Details of the Researcher

PHOTO

Hiroaki Misawa
Section
Graduate School of Science
Job title
Associate Professor
Degree

  • 博士（理学）（東北大学）

Research History 4

  • 2007/04 - Present
    Tohoku University　Graduate School of Science　Associate professor

  • 1998/04 - 2007/03
    Tohoku University, Assistant Professor

  • 1995/06 - 1998/03
    Tohoku University, Research Assistant

  • 1989/09 - 1995/05
    Nagoya University, Research Assistant

Education 2

  • Tohoku University　Graduate School, Division of Natural Science　地球物理学

    - 1989/08

  • Tohoku University　Faculty of Science　天文及び地球物理学科第二

    - 1985/03

Committee Memberships 18

  • VLBI科学諮問委員会　委員

    2022/09 - Present

  • VLBI懇談会　機関幹事

    2019/11 - Present

  • 国立天文台電波天文周波数委員会　台外委員

    2019/06 - 2025/06

  • 日本地球惑星科学連合　学生優秀発表賞審査員

    2023/05 - 2023/05

  • 日本地球惑星科学連合　学生優秀発表賞審査員

    2022/05 - 2022/06

  • 日本地球惑星科学連合　学生優秀発表賞審査員

    2018/05 - 2018/05

  • 日本地球惑星科学連合　学生優秀発表賞審査員

    2017/05 - 2017/05

  • 日本地球惑星科学連合　学生優秀発表賞審査員

    2016/05 - 2016/05

  • 地球電磁気・地球惑星圏学会　学生発表賞審査委員

    2015/10 - 2015/11

  • 地球電磁気・地球惑星圏学会　学生発表賞審査委員

    2015/10 - 2015/11

  • 国際ディジタル地球年国内委員会　委員

    2006/10 - 2009/03

  • 国際ディジタル地球年国内委員会　委員

    2006/10 - 2009/03

  • 学術会議 地球電磁気学研究連絡委員会 地球電磁気・超高層大気データ問題検討小委員会　委員

    2004/06 - 2006/09

  • 学術会議 地球電磁気学研究連絡委員会 地球電磁気・超高層大気データ問題検討小委員会　委員

    2004/06 - 2006/09

  • 学術会議 地球電磁気学研究連絡委員会 将来計画策定ワーキンググループ　委員

    2001/04 - 2002/03

  • 学術会議 地球電磁気学研究連絡委員会 将来計画策定ワーキンググループ　委員

    2001/04 - 2002/03

  • 日本地球惑星科学連合　学生優秀発表賞審査員

    2017/05 -

  • 日本地球惑星科学連合　学生優秀発表賞審査員

    2016/05 -

Show all ︎Show first 5

Professional Memberships 3

  • 米国地球物理学会

  • 日本天文学会

  • 地球電磁気・地球惑星圏学会

Research Interests 3

  • physics of upper atmosphere

  • physics of planetary magnetosphere

  • Physics of solar radio emissions

Research Areas 1

  • Natural sciences / Space and planetary science / Physics of Planetary Magnetospheres

Awards 1

  1. 特別研究員等審査会専門委員（書面担当）表彰

    2018/07　日本学術振興会

Papers 235

  1. Long-term variable nature of Jupiterʼs auroral radio emissions - II

    Hiroaki Misawa, Fuminori Tsuchiya

    Proc. Symp. Planet. Sci. 2025　2025/04

  2. Optical photon-counting observation of the Crab pulsar with the Kanata telescope using a prototype IMONY Peer-reviewed

    Takeshi Nakamori, Kazuaki Hashiyama, Rin Sato, Masayoshi Shoji, Anju Sato, Eiji Ono, Yuga Ouchi, Tatsuya Nakaoka, Koji S Kawabata, Toshio Terasawa, Hiroaki Misawa, Fuminori Tsuchiya, Kazuhiro Takefuji, Yasuhiro Murata, Dai Takei, Kazuki Ueno, Hiroshi Akitaya

    Publications of the Astronomical Society of Japan　2025/03/08

    Publisher: Oxford University Press (OUP)

    DOI： 10.1093/pasj/psaf009 　

    ISSN： 0004-6264

    eISSN： 2053-051X

    More details Close

    Abstract We have developed an optical photon-counting imaging system, IMONY, as an instrument for short-scale time-domain astronomy. In this study, we utilized a Geiger avalanche photodiode array with a $4\times 4$ pixel configuration, with each pixel measuring 100 µm. We developed a dedicated analog frontend board and constructed a data acquisition system with an FPGA to time-stamp each photon with a time resolution of 100 ns. We mounted a prototype model of the system on the 1.5 m Kanata telescope, intending to observe the Crab pulsar and conduct joint observations with the Iitate and Usuda radio telescopes in Japan. We successfully demonstrated that IMONY could image the Crab pulsar as an expected point source and acquire the well-known pulse shape. We found that the time lag between the optical and radio main pulses was $304\pm 35$ µs, consistent with previous studies.

  3. Development of wideband antennas (V)

    Hideki Ujihara, Hideyuki Nosaka, Yoji Kuwayama, Hiroaki Misawa, Hajime Kita, Fuminori Tsuchiya, Tomohiko Mitani

    IEICE Technical Report　124　(427)　104-107　2025/03

  4. Properties of EMIC Waves and EMIC Wave-Driven Electron Precipitation in Subauroral Latitudes Observed at Athabasca, Canada Peer-reviewed

    Asuka Hirai, Fuminori Tsuchiya, Takahiro Obara, Yoshizumi Miyoshi, Yuto Katoh, Yasumasa Kasaba, Kazuo Shiokawa, Atsushi Kumamoto, Yoshiya Kasahara, Shoya Matsuda, Hiroaki Misawa, Satoshi Kurita, Chae-Woo Jun, Hiroyo Ohya, Martin G. Connors

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　130　(3)　2025/03

    DOI： 10.1029/2024JA033357 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  5. The Radio & Plasma Wave Investigation (RPWI) for the JUpiter ICy moons Explorer (JUICE) Peer-reviewed

    J. E. Wahlund, J. E.S. Bergman, L. Åhlén, W. Puccio, B. Cecconi, Y. Kasaba, I. Müller-Wodarg, H. Rothkaehl, M. Morawski, O. Santolik, J. Soucek, J. Grygorczuk, Wisniewski, P. Henri, J. L. Rauch, O. Le Duff, A. Retinò, M. Mansour, S. Stverak, J. Laifr, D. Andrews, M. André, I. Benko, M. Berglund, V. Cripps, C. Cully, J. Davidsson, A. Dimmock, N. J.T. Edberg, A. I. Eriksson, J. Fredriksson, R. Gill, S. Gomis, B. Holback, S. E. Jansson, F. Johansson, E. P.G. Johansson, Y. Khotyaintsev, B. Mårtensson, M. W. Morooka, T. Nilsson, D. Ohlsson, D. Pelikan, L. Richard, F. Shiwa, E. Vigren, H. C. Wong, X. Bonnin, J. N. Girard, L. Grosset, F. Henry, L. Lamy, J. P. Lebreton, P. Zarka, Y. Katoh, H. Kita, A. Kumamoto, H. Misawa, F. Tsuchiya, M. Galand, T. Barcinski, J. Baran, T. Kowalski, P. Szewczyk, B. Grison, J. Jansky, I. Kolmasova, R. Lan, D. Pisa, U. Taubenschuss, L. Uhlir, K. Bochra, M. Borys, M. Duda, T. Kucinski, M. Ossowski, P. Palma, M. Tokarz, F. Colin, P. Dazzi, E. De Léon, T. Hachemi, A. L. Millet, O. Randrianboarisson, O. Sene, T. Chust, O. Le Contel, P. Canu, L. Hadid, F. Sahraoui, Y. Zouganelis, D. Alison, N. Ba, A. Jeandet, M. Lebassard, J. D. Techer, F. Mehrez, L. Varizat, A. V. Sumant, G. Sou

    Space Science Reviews　221　(1)　2025/02

    DOI： 10.1007/s11214-024-01110-0 　

    ISSN： 0038-6308

    eISSN： 1572-9672

  6. Properties of EMIC waves and EMIC wave-driven REP observed in subauroral latitudes Peer-reviewed

    Asuka Hirai, Fuminori Tsuchiya, Takahiro Obara, Yoshizumi Miyoshi, Yuto Katoh, Yasumasa Kasaba, Kazuo Shiokawa, Atsushi Kumamoto, Yoshiya Kasahara, Shoya Matsuda, Hiroaki Misawa, Satoshi Kurita, Chae-Woo Jun, Hiroyo Ohya, Martin Connors

    2024/09/30

    DOI： 10.22541/essoar.172770775.56789190/v1 　

  7. Solar wind response of the dawn-dusk asymmetry in the Io plasma torus using the Haleakala T60 and HISAKI satellite observations Peer-reviewed

    Hiroyasu Kondo, Fuminori Tsuchiya, Masato Kagitani, Shinnosuke Satoh, Hiroaki Misawa, Yuki Nakamura, Go Murakami, Tomoki Kimura, Atsushi Yamazaki, Ichiro Yoshikawa, Hajime Kita, Chihiro Tao

    2024/05/28

    DOI： 10.22541/essoar.171692989.93103153/v1 　

  8. Preparation status at Tohoku University for low-frequency solar and planetary radio observations

    Proc. Symp. Planet. Sci. 2024　2024/04

  9. Solar Type J Radio Bursts and the Associated Coronal Loop Peer-reviewed

    S. W. Feng, H. X. Xie, H. Misawa

    The Astrophysical Journal　964　(2)　108-108　2024/03

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/ad267f 　

    ISSN： 0004-637X

    eISSN： 1538-4357

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    Abstract The solar type J radio burst is a variant of type III bursts, which are a probe for understanding solar energetic electrons and local electron density. This study investigates a type J burst event on 2017 September 9. We have combined the data from the extreme-ultraviolet (EUV) imaging and the EUV Imaging Spectrometer (EIS) to analyze the event. Within 4 minutes several type J bursts with similar morphology occur. Two of them, with clear fundamental and second harmonic bands, are studied in detail. We find a delay of 2 ± 0.5 s between their different harmonic bands. During type J bursts, only one coronal loop brightens significantly at its northern footpoint, in correlation with the continuous injection of erupting jets into the loop. The EUV intensity of the brightening footpoint is correlated with the radio flux at 245 and 410 MHz, with correlation coefficients of 0.2 and 0.4, respectively. These observations suggest that the type J bursts should originate from this coronal loop. By analyzing the electron number density distribution along the coronal loop diagnosed from the EIS data and the time evolution of the plasma frequency calculated from the type J burst, we determine that the velocities of the energetic electrons exciting the two type Js are 0.10 ± 0.02c and 0.12 ± 0.02c. Our results confirm previous studies on type J bursts.

  10. Ray tracing for Jupiter’s icy moon ionospheric occultation of Jovian auroral radio sources Peer-reviewed

    Rikuto Yasuda, Tomoki Kimura, Baptiste Cecconi, Hiroaki Misawa, Fuminori Tsuchiya, Yasumasa Kasaba, Shinnosuke Satoh, Shotaro Sakai, Corentin Louis

    2024/03

    DOI： 10.5194/egusphere-egu24-6850 　

  11. Spatio-Temporal Characteristics of IPDP-Type EMIC Waves on April 19, 2017: Implications for Loss of Relativistic Electrons in the Outer Belt Peer-reviewed

    Asuka Hirai, Fuminori Tsuchiya, Takahiro Obara, Yuto Katoh, Yoshizumi Miyoshi, Kazuo Shiokawa, Yasumasa Kasaba, Hiroaki Misawa, Chae Woo Jun, Satoshi Kurita, Martin G. Connors, Aaron T. Hendry, Atsuki Shinbori, Yuichi Otsuka, Takuya Tsugawa, Michi Nishioka, Septi Perwitasari, Jerry W. Manweiler

    Journal of Geophysical Research: Space Physics　128　(8)　2023/08

    DOI： 10.1029/2023JA031479 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  12. Causalities of occurrence features of Io-related Jupiter's radio emission

    H. Misawa, A. Kumamoto, R. Yasuda

    Proc. Symp. Planet. Sci. 2023　24　2023/04

  13. Reconsideration for causalities of occurrence features of Io-related Jupiter's radio emission

    H. Misawa, A. Kumamoto, R. Yasuda

    Proc. Symp. Planet. Sci. 2022　2022/05

  14. Multi-frequency radio observations of the radio-loud magnetar XTE J1810−197 Peer-reviewed

    Sujin Eie, Toshio Terasawa, Takuya Akahori, Tomoaki Oyama, Tomoya Hirota, Yoshinori Yonekura, Teruaki Enoto, Mamoru Sekido, Kazuhiro Takefuji, Hiroaki Misawa, Fuminori Tsuchiya, Shota Kisaka, Takahiro Aoki, Mareki Honma

    Publications of the Astronomical Society of Japan　73　(6)　1563-1574　2021/12/02

    Publisher: Oxford University Press (OUP)

    DOI： 10.1093/pasj/psab098 　

    ISSN： 0004-6264

    eISSN： 2053-051X

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    <title>Abstract</title> We report on the multi-frequency multi-epoch radio observations of the magnetar XTE J1810−197, which exhibited a radio outburst from 2018 December after its 10-year quiescent period. We performed quasi-simultaneous observations with VERA (22 GHz), Hitachi (6.9 GHz and 8.4 GHz), Kashima (2.3 GHz), and Iitate (0.3 GHz) radio telescopes located in Japan to trace the variability of the magnetar radio pulsations during the observing period from 2018 December 13 to 2019 June 12. The pulse width becomes narrower as the observing frequency goes higher, analogous to the general profile narrowing behavior of ordinary pulsars. When assuming a simple power law in the range of 2.3 GHz and 8.7 GHz, the radio spectrum of the magnetar goes steeper with the average spectral index 〈α〉 ≈ −0.85 for the first four months. The wide-band radio spectra gathered from our observations and the literature suggest that XTE J1810−197 would have a double-peaked spectrum with a valley point in 22–150 GHz, where the first spectral peak implies a gigahertz-peaked spectrum (GPS) feature with a peak at a few GHz. The GPS and the high-frequency peak have been identified in the spectra of other radio-loud magnetars, thus they may be intrinsic features that can give a new insight to the understanding of various emission mechanisms and the surrounding environments of radio magnetars. Our study emphasizes the importance of simultaneous long-term broad-band observations toward radio-loud magnetars to capture the puzzling spectral features and establish a link to other types of neutron stars.

  15. Calibration of the JUICE RWI Antennas by Numerical Simulation Peer-reviewed

    G. Fischer, M. Panchenko, W. Macher, Y. Kasaba, H. Misawa, M. Tokarz, L. Wisniewski, B. Cecconi, J. Bergman, J.‐E. Wahlund

    Radio Science　56　(11)　2021/11

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2021rs007309 　

    ISSN： 0048-6604

    eISSN： 1944-799X

  16. メートル波帯VLBI観測に向けて： 飯舘観測所の電波環境

    三澤浩昭, 土屋史紀, 小林秀行, 小山友明, 河野祐介, 赤堀卓也, 高橋慶太郎, 鈴木駿策

    2020年度VLBI懇談会シンポジウム集録　2021/08

  17. Enhanced x-ray emission coinciding with giant radio pulses from the Crab Pulsar Peer-reviewed

    Teruaki Enoto, Toshio Terasawa, Shota Kisaka, Chin-Ping Hu, Sebastien Guillot, Natalia Lewandowska, Christian Malacaria, Paul S. Ray, Wynn C.G. Ho, Alice K. Harding, Takashi Okajima, Zaven Arzoumanian, Keith C. Gendreau, Zorawar Wadiasingh, Craig B. Markwardt, Yang Soong, Steve Kenyon, Slavko Bogdanov, Walid A. Majid, Tolga Güver, Gaurava K. Jaisawal, Rick Foster, Yasuhiro Murata, Hiroshi Takeuchi, Kazuhiro Takefuji, Mamoru Sekido, Yoshinori Yonekura, Hiroaki Misawa, Fuminori Tsuchiya, Takahiko Aoki, Munetoshi Tokumaru, Mareki Honma, Osamu Kameya, Tomoaki Oyama, Katsuaki Asano, Shinpei Shibata, Shuta J. Tanaka

    Science　372　(6538)　187-190　2021/04/09

    Publisher: American Association for the Advancement of Science (AAAS)

    DOI： 10.1126/science.abd4659 　

    ISSN： 0036-8075

    eISSN： 1095-9203

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    Giant radio pulses (GRPs) are sporadic bursts emitted by some pulsars that last a few microseconds and are hundreds to thousands of times brighter than regular pulses from these sources. The only GRP-associated emission outside of radio wavelengths is from the Crab Pulsar, where optical emission is enhanced by a few percentage points during GRPs. We observed the Crab Pulsar simultaneously at x-ray and radio wavelengths, finding enhancement of the x-ray emission by 3.8 ± 0.7% (a 5.4σ detection) coinciding with GRPs. This implies that the total emitted energy from GRPs is tens to hundreds of times higher than previously known. We discuss the implications for the pulsar emission mechanism and extragalactic fast radio bursts.

  18. Invitation to low-frequency radio astronomy -- Initiatives by Tohoku University --

    Proc. Symp. Planet. Sci. 2021　2021/04

  19. Origin of Jupiter's hectometric radiations (HOM) viewed from their polarization characteristics

    Misawa, H., F. Tsuchiya, A. Kumamoto, Y. Kasahara, Y. Miyoshi, M. Kitahara, S. Nakamura

    Proc. Symp. Planet. Sci. 2021　2021/04

  20. Examination of the Relation between Jupiter's Inner Magnetosphere and Magnetic Reconfiguration Events

    Misawa, H., H. Kita and F. Tsuchiya

    Proc. Symp. Planet. Sci. 2020　2020/04

  21. Seasonal variation of north–south asymmetry in the intensity of Saturn Kilometric Radiation from 2004 to 2017 Peer-reviewed

    Yuki Nakamura, Yasumasa Kasaba, Tomoki Kimura, Laurent Lamy, Baptiste Cecconi, Georg Fischer, Ayumu Sasaki, Chihiro Tao, Fuminori Tsuchiya, Hiroaki Misawa, Atsushi Kumamoto, Akira Morioka

    Planetary and Space Science　178　(15)　104711　2019/11/15

    DOI： 10.1016/j.pss.2019.104711 　

    ISSN： 0032-0633

  22. Solar Fast-drifting Radio Bursts in an X1.3 Flare on 2014 April 25 Peer-reviewed

    Tan, B, N. Chen, Y.-H. Yang, C. Tan, S. Masuda, X. Chen, H. Misawa

    Astrophysical Journal　855　90 (10pp)　2019/11/01

    DOI： 10.3847/1538-4357/ab4718 　

    ISSN： 0004-637X

  23. Meeting the Magnetic EMC Challenges for the In-Situ Field Measurements on the Juice Mission Peer-reviewed

    P. Brown, U. Auster, J. E.S. Bergman, J. Fredriksson, Y. Kasaba, M. Mansour, A. Pollinger, R. Baughen, M. Berglund, D. Hercik, H. Misawa, A. Retino, M. Bendyk, W. Magnes, B. Cecconi, M. K. Dougherty, G. Fischer

    Proceedings of 2019 ESA Workshop on Aerospace EMC, Aerospace EMC 2019　2019/05

    DOI： 10.23919/AeroEMC.2019.8788942 　

  24. Azimuthal Variation in the Io Plasma Torus Observed by the Hisaki Satellite From 2013 to 2016 Peer-reviewed

    F. Tsuchiya, R. Arakawa, H. Misawa, M. Kagitani, R. Koga, F. Suzuki, R. Hikida, K. Yoshioka, A. Steffl, F. Bagenal, P. Delamere, T. Kimura, Y. Kasaba, G. Murakami, I. Yoshikawa, A. Yamazaki, M. Yoneda

    Journal of Geophysical Research: Space Physics　124　(5)　3236-3254　2019/05

    DOI： 10.1029/2018JA026038 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  25. Expected Source Region of Jupiter’s Hectometric Radiation Relating to Magnetotail Reconnection

    Misawa, H, F. Tsuchiya, T. Mizuguchi

    Proc. Symp. Planet. Sci. 2019　2019/04

  26. Two-element radio interferometer for the observation of Jupiter's synchrotron radiation Peer-reviewed

    Tsuchiya, F, H. Misawa, H. Kita, A. Morioka, T. Kondo

    Proc. International Sympo. Planetary Science 2011　47-58　2019/03

    DOI： 10.5047/pisps.047 　

  27. Short-term variation in the dawn-dusk asymmetry of the Jovian radiation belt obtained from GMRT and Hisaki EXCEED observations Peer-reviewed

    Kita, H, H. Misawa, A. Bhardwaj, F. Tsuchiya, G. Murakami, C. Tao, T. Kimura, K. Yoshioka, A. Yamazaki, Y. Kasaba, I. Yoshikawa, M. Fujimoto

    Astrophys. J. Lett.　872　(2)　2019/02

    DOI： 10.3847/2041-8213/ab0427 　

    ISSN： 2041-8205

    eISSN： 2041-8213

  28. Impact of Io's volcanic activity to environment and dynamics in the Jovian magnetosphere : from HISAKI results

    Tsuchiya, F, K. Yoshioka, T. Kimura, G. Murakami, A. Yamazaki, M. Kagitani, C. Tao, H. Kita, R. Koga, F. Suzuki, R. Hikida, Y. Kasaba, H. Misawa, T. Sakanoi, I. Yoshikawa

    Proceedings of Symposium on Planetary Science 2019　2019

  29. Temporal and Spatial Correspondence of Pc1/EMIC Waves and Relativistic Electron Precipitations Observed with Ground‐Based Multi‐Instruments on 27 March 2017 Peer-reviewed

    Hirai, A, F. Tsuchiya T. Obara, Y. Kasaba, Y. Katoh, H. Misawa, K. Shiokawa, Y. Miyoshi, S. Kurita, S. Matsuda, M. Connors, T. Nagatsuma, K. Sakaguchi, Y. Kasahara, A. Kumamoto, A, Matsuoka M, Shoji I. Shinohara, J. M. Albert

    Geophys. Res. Lett.　(24)　13182-13191　2018/12

    DOI： 10.1029/2018GL080126 　

  30. Energetic electron precipitation associated with pulsating aurora observed by VLF radio propagation during the recovery phase of a substorm on 27 March 2017 Peer-reviewed

    Tsuchiya, F, A. Hirai, T. Obara, H. Misawa, S. Kurita, Y. Miyoshi, K. Shiokawa, M. Connors, M. Ozaki, Y. Kasahara, A. Kumamoto, Y. Kasaba, A, Matsuoka M, Shoji I. Shinohara

    Geophys. Res. Lett.　45　(23)　12651-12660　2018/12

    DOI： 10.1029/2018GL080222 　

  31. サブオーロラ帯におけるEMIC波動と高エネルギー電子降下観測

    平井あすか, 土屋史紀, 小原隆博, 笠羽康正, 加藤雄人, 三澤浩昭, 塩川和夫, 三好由純, 栗田怜, Martin Connors

    宇宙航空研究開発機構特別資料: 第15回「宇宙環境シンポジウム」講演論文集　11-16　2018/11

    ISSN： 2433-2232

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    放射線帯外帯の相対論的電子は、磁気圏内で発生するプラズマ波動との相互作用により散乱され地球大気に降下する。この過程は、磁気嵐の主相における外帯消失の要因の一つと考えられており、降下した相対論的電子は、国際宇宙ステーションや低軌道衛星への悪影響、下部電離圏での電子密度増加に伴う通信障害を引き起こし得る。本研究では、放射線帯の相対論的電子を降下消失させる電磁イオンサイクロトロン（EMIC）波動に着目した。電子降下は、VLF/LF帯の人工電波を用いて観測した。地上と電離圏下端の間を長距離伝搬する電波の信号は、電子降下に伴う電離圏D領域高度での局所的な擾乱により振幅・位相変調をうける。本研究では、複合地上観測により、2017年3月27日の磁気嵐主相時のEMIC波動とそれに伴う相対論的電子降下の時空間対応を調べた。その結果、数10秒から数分の時間スケールで変化するEMIC波動強度の増大時に、相対論的電子が散乱され大気に降下消失することが明らかとなった。

  32. Investigating solar wind‐driven electric field influence on long‐term dynamics of Jovian synchrotron radiation Peer-reviewed

    Han, S, G. Murakami, H. Kita, F. Tsuchiya C. Tao, H. Misawa, A. Yamazaki, M. Nakamura

    J. Geiophys. Res.　123　(11)　9508-9516　2018/11

    DOI： 10.1029/2018JA025849 　

  33. Enhancement of the Jovian Magnetospheric Plasma Circulation Caused by the Change in Plasma Supply From the Satellite Io Peer-reviewed

    F. Tsuchiya, K. Yoshioka, T. Kimura, R. Koga, G. Murakami, A. Yamazaki, M. Kagitani, C. Tao, F. Suzuki, R. Hikida, I. Yoshikawa, Y. Kasaba, H. Kita, H. Misawa, T. Sakanoi

    Journal of Geophysical Research: Space Physics　123　(8)　6514-6532　2018/08

    DOI： 10.1029/2018JA025316 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  34. 木星の磁気圏尾部再結合現象に関連するヘクトメートル電波の同定

    三澤浩昭, 土屋史紀, 水口岳宏

    第19回惑星圏研究会集録集　19　SPS2018_81　2018/04

  35. Detection of Propagating Fast Sausage Waves through Detailed Analysis of a Zebra-pattern Fine Structure in a Solar Radio Burst Peer-reviewed

    K. Kaneda, H. Misawa, K. Iwai, S. Masuda, F. Tsuchiya, Y. Katoh, T. Obara

    Astrophysical Journal Letters　855　(2)　doi:10.3847/2041-8213/aab2a5　2018/03/10

    Publisher: Institute of Physics Publishing

    DOI： 10.3847/2041-8213/aab2a5 　

    ISSN： 2041-8213 2041-8205

  36. Hitomi X-ray studies of giant radio pulses from the Crab pulsar Peer-reviewed

    Felix Aharonian, Hiroki Akamatsu, Fumie Akimoto, Steven W. Allen, Lorella Angelini, Marc Audard, Hisamitsu Awaki, Magnus Axelsson, Aya Bamba, Marshall W. Bautz, Roger Blandford, Laura W. Brenneman, Gregory V. Brown, Esra Bulbul, Edward M. Cackett, Maria Chernyakova, Meng P. Chiao, Paolo S. Coppi, Elisa Costantini, Jelle De Plaa, Cor P. De Vries, Jan Willem Den Herder, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan E. Eckart, Teruaki Enoto, Yuichiro Ezoe, Andrew C. Fabian, Carlo Ferrigno, Adam R. Foster, Ryuichi Fujimoto, Yasushi Fukazawa, Akihiro Furuzawa, Massimiliano Galeazzi, Luigi C. Gallo, Poshak Gandhi, Margherita Giustini, Andrea Goldwurm, Liyi Gu, Matteo Guainazzi, Yoshito Haba, Kouichi Hagino, Kenji Hamaguchi, Ilana M. Harrus, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Kiyoshi Hayashida, Junko S. Hiraga, Ann Hornschemeier, Akio Hoshino, John P. Hughes, Yuto Ichinohe, Ryo Iizuka, Hajime Inoue, Yoshiyuki Inoue, Manabu Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Masachika Iwai, Jelle Kaastra, Tim Kallman, Tsuneyoshi Kamae, Jun Kataoka, Satoru Katsuda, Nobuyuki Kawai, Richard L. Kelley, Caroline A. Kilbourne, Takao Kitaguchi, Shunji Kitamoto, Tetsu Kitayama, Takayoshi Kohmura, Motohide Kokubun, Katsuji Koyama, Shu Koyama, Peter Kretschmar, Hans A. Krimm, Aya Kubota, Hideyo Kunieda, Philippe Laurent, L. E.E. Shiu-Hang, Maurice A. Leutenegger, Olivier O. Limousin, Michael Loewenstein, Knox S. Long, David Lumb, Greg Madejski, Yoshitomo Maeda, Daniel Maier, Kazuo Makishima, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Brian R. McNamara, Missagh Mehdipour, Eric D. Miller, Jon M. Miller, Shin Mineshige

    Publications of the Astronomical Society of Japan　70　(2)　doi:10.1093/pasj/psx083　2018/03/01

    DOI： 10.1093/pasj/psx083 　

    ISSN： 0004-6264

    eISSN： 2053-051X

  37. Variation of Jupiter's Aurora Observed by Hisaki/EXCEED: 3. Volcanic Control of Jupiter's Aurora Peer-reviewed

    Chihiro Tao, Tomoki Kimura, Fuminori Tsuchiya, Go Muirakami, Kazuo Yoshioka, Atsushi Yamazaki, Sarah V. Badman, Hiroaki Misawa, Hajime Kita, Yasumasa Kasaba, Ichiro Yoshikawa, Masaki Fujimoto

    Geophysical Research Letters　45　(1)　71-79　2018/01/16

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1002/2017GL075814 　

    ISSN： 1944-8007 0094-8276

    eISSN： 1944-8007

  38. Feasibility of the exploration of the ice crust structures of Jupiter's moon based on Jovian radio wave observations Peer-reviewed

    Kumamoto, A. Y. Kasaba, F. Tsuchiya, H. Misawa, H. Kita, W. Puccio, J.E. Wahlund, J. Bergman, B. Cecconi, Y. Goto, J. Kimura, T. Kobayashi

    Planetary Radio Emission VIII　127-136　2018

    DOI： 10.1553/PRE8s127 　

  39. Feasibility of the exploration of the subsurface structures of Jupiter's icy moons by interference of Jovian hectometric and decametric radiation Peer-reviewed

    Kumamoto, A, Y. Kasaba, F. Tsuchiya, H. Misawa, H. Kita, W. Puccio, J.-E. Wahlund, J. Bergman, B. Cecconi, Y. Goto, J. Kimura, T. Kobayashi

    Planetary Radio Emissions VIII　127-136　2018

    DOI： 10.1553/PRE8s127 　

  40. Software-Type Wave-Particle Interaction Analyzer (S-WPIA) by RPWI for JUICE: Science Objectives and Implementation Peer-reviewed

    Katoh, Y, H. Kojima, K. Asamura, Y. Kasaba, F. Tsuchiya, Y. Kasahara, T. Imachi, H. Misawa, A. Kumamoto, S. Yagitani, K. Ishisaka, T. Kimur, M. Hikishima, Y. Miyoshi, M. Shoji, M. Kitahara, O. Santolik, J. Bergman, W. Puccio, R. Gill, M. Wieser, W. Schmidt, S. Barabash, J. E. Wahlund

    Planetary Radio Emission VIII　2016　2018

    DOI： 10.1553/PRE8s495 　

  41. A Flux Comparison of Northern and Southern Saturn Kilometric Radio Bursts During Southern Summer Peer-reviewed

    Kasaba Y, T. Kimura, D. Maruno, A. Morioka, B. Cecconi, L. Lamy, C.M. Jackman, C. Tao, H. Kita, H. Misawa, F. Tsuchiya, A. Kumamoto

    Planetary Radio Emission VIII　2018

    DOI： 10.1553/PRE8s205 　

  42. Database of solar radio bursts observed by solar radio spectro-polarimeter AMATERAS Peer-reviewed

    Tsuchiya, F, H. Misawa, T. Obara, K. Iwai, K. Kaneda, S. Matsumoto, A. Kumamoto, Y. Katoh, M. Yagi, B. Cecconi

    Planetary Radio Emission VIII　2018

    DOI： 10.1553/PRE8s445 　

  43. Polarization Characteristics of Zebra Patterns in Type IV Solar Radio Bursts Peer-reviewed

    Kaneda, K, H. Misawa, K. Iwai, F. Tsuchiya, T. Obara, Y. Katoh, S. Masuda

    Astrophys. J.　842　45K　2017/06

    DOI： 10.3847/1538-4357/aa74c1 　

    ISSN： 1538-4357

  44. Polarization Characteristics of Zebra Patterns in Type IV Solar Radio Bursts Peer-reviewed

    K. Kaneda, H. Misawa, K. Iwai, F. Tsuchiya, T. Obara, Y. Katoh, S. Masuda

    ASTROPHYSICAL JOURNAL　842　(1)　doi:10.3847/1538-4357/aa74c1　2017/06

    DOI： 10.3847/1538-4357/aa74c1 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  45. Occurrence characteristics of Jupiter's quasi-periodic decametric radio emission in the magnetospheric plasma enhancement period

    H. Misawa, F. Tsuchiya

    Proc. Symp. Planet. Sci. 2017　SPS2017_38　2017/04

  46. Radio and Plasma Wave Investigations (RPWI) in Japan-NOW: Engineering Model Development

    Yasumasa Kasaba, Hiroaki Misawa, Fuminori Tsuchiya, Yoshiya Kasahara, Tomohiko Imachi, Tomoki Kimura, Y Katoh, Atsushi Kumamoto, Hirotsugu Kojima, Satoshi Yagitani, Mitsunori Ozaki, U Ishisaka, Chihiro Tao, Takumi Abe, Yoshizumi Miyoshi

    第 18 回宇宙科学シンポジウム 講演集　SA6000118040　2017

  47. Io and magnetospheric plasma interaction derived from the HISAKI observation

    Fuminori Tsuchiya, Kazuo Yoshioka, Masato Kagitani, Tomoki Kimura, Go Murakami, Atsushi Yamazaki, Hiroaki Misawa, Yasumasa Kasaba, Ichiro Yoshikawa, Takeshi Sakanoi, Ryoichi Koga, Ryo Arakawa, Fumiharu Suzuki, Reina Hikida

    第 18 回宇宙科学シンポジウム 講演集　SA6000118040　2017

  48. WIDE-BAND SPECTRA of GIANT RADIO PULSES from the CRAB PULSAR Peer-reviewed

    Ryo Mikami, Katsuaki Asano, Shuta J. Tanaka, Shota Kisaka, Mamoru Sekido, Kazuhiro Takefuji, Hiroshi Takeuchi, Hiroaki Misawa, Fuminori Tsuchiya, Hajime Kita, Yoshinori Yonekura, Toshio Terasawa

    Astrophysical Journal　832　(2)　2016/12/01

    DOI： 10.3847/0004-637X/832/2/212 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  49. Auroral evidence of radial transport at Jupiter during January 2014 Peer-reviewed

    R. L. Gray, S. V. Badman, B. Bonfond, T. Kimura, H. Misawa, J. D. Nichols, M. F. Vogt, L. C. Ray

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　121　(10)　9972-9984　2016/10

    DOI： 10.1002/2016JA023007 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  50. Back to Jupiter, with renovated point of view and focus on icy moons -- Toward the Flight of Radio and Plasma Wave Instruments -- Invited

    Kasaba, Y, H. Misawa, F. Tsuchiya, Y. Kasahara, T. Imachi, T. Kimura, Y. Katoh, A. Kumamoto, H. Kojima, S. Yagitani, M. Ozaki, K. Ishisaka, C. Tao, Y. Miyoshi, T. Abe, B. Cecconi, M.W. Morooka, J.-E. Wahlund, JUICE-RPWI Japan team

    Japanese Soc. Planet. Sci.　25　(3)　96-107　2016/09

  51. Very Long Baseline Interferometry Experiment on Giant Radio Pulses of Crab Pulsar toward Fast Radio Burst Detection Peer-reviewed

    K. Takefuji, T. Terasawa, T. Kondo, R. Mikami, H. Takeuchi, H. Misawa, F. Tsuchiya, H. Kita, M. Sekido

    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC　128　(966)　2016/08

    DOI： 10.1088/1538-3873/128/966/084502 　

    ISSN： 0004-6280

    eISSN： 1538-3873

  52. Characteristics of solar wind control on Jovian UV auroral activity deciphered by long-term Hisaki EXCEED observations: Evidence of preconditioning of the magnetosphere? Peer-reviewed

    Hajime Kita, Tomoki Kimura, Chihiro Tao, Fuminori Tsuchiya, Hiroaki Misawa, Takeshi Sakanoi, Yasumasa Kasaba, Go Murakami, Kazuo Yoshioka, Atsushi Yamazaki, Ichiro Yoshikawa, Masaki Fujimoto

    GEOPHYSICAL RESEARCH LETTERS　43　(13)　6790-6798　2016/07

    DOI： 10.1002/2016GL069481 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  53. Variation characteristics of Jupiter's radio emission during the HISAKI Jupiter observation campaign in 2015

    Misawa, H, F. Tsuchiya, T. Kimura, Y. Kasaba, A. Kumamoto

    Proc. 17th Symp. Planet. Sci.　17　SPS2016_66　2016/04

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  54. Summary of JSPS program on international collaboration for planetary plasma and atmospheric dynamics research based on Hawaiian planetary telescopes

    Sakanoi, T, M. Kagitani, H. Nakagawa, N. Terada, T. Kuroda, Y. Kasaba, T. Obara, H. Misawa, F. Tsuchiya

    Proceedings of Symposium on Planetary Science 2016　2016

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  55. FREQUENCY DEPENDENCE OF POLARIZATION OF ZEBRA PATTERN IN TYPE-IV SOLAR RADIO BURSTS Peer-reviewed

    Kazutaka Kaneda, H. Misawa, K. Iwai, F. Tsuchiya, T. Obara

    ASTROPHYSICAL JOURNAL LETTERS　808　(2)　2015/08

    DOI： 10.1088/2041-8205/808/2/L45 　

    ISSN： 2041-8205

    eISSN： 2041-8213

  56. Relation between the short-term variation of the Jovian radiation belt and thermosphere derived from radio and infrared observations Peer-reviewed

    Hajime Kita, Hiroaki Misawa, Anil Bhardwaj, Fuminori Tsuchiya, Takeshi Sakanoi, Yasumasa Kasaba, Chihiro Tao, Yoshizumi Miyoshi, Akira Morioka

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　120　(8)　6614-6623　2015/08

    DOI： 10.1002/2015JA021374 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  57. SOLAR MICRO-TYPE III BURST STORMS AND LONG DIPOLAR MAGNETIC FIELD IN THE OUTER CORONA Peer-reviewed

    A. Morioka, Y. Miyoshi, K. Iwai, Y. Kasaba, S. Masuda, H. Misawa, T. Obara

    ASTROPHYSICAL JOURNAL　808　(2)　2015/08

    DOI： 10.1088/0004-637X/808/2/191 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  58. Relativistic electron precipitations in association with diffuse aurora: Conjugate observation of SAMPEX and the all-sky TV camera at Syowa Station Peer-reviewed

    Satoshi Kurita, Akira Kadokura, Yoshizumi Miyoshi, Akira Morioka, Yuka Sato, Hiroaki Misawa

    GEOPHYSICAL RESEARCH LETTERS　42　(12)　4702-4708　2015/06

    DOI： 10.1002/2015GL064564 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  59. Variation characteristics of Jupiter’s hectometric radiation during the Jupiter observation campaign in Jan., 2014

    Misawa, H, F. Tsuchiya, T. Kimura, A. Kumamoto

    Proc. 15th Symp. Planet. Sci.　15　SPS2015_45　2015/04

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  60. Observational evidence of electron pitch angle scattering driven by ECH waves Peer-reviewed

    Satoshi Kurita, Yoshizumi Miyoshi, Christopher M. Cully, Vassilis Angelopoulos, Olivier Le Contel, Mitsuru Hikishima, Hiroaki Misawa

    GEOPHYSICAL RESEARCH LETTERS　41　(22)　8076-8080　2014/11

    DOI： 10.1002/2014GL061927 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  61. SPECTRAL STRUCTURES AND THEIR GENERATION MECHANISMS FOR SOLAR RADIO TYPE-I BURSTS Peer-reviewed

    K. Iwai, Y. Miyoshi, S. Masuda, F. Tsuchiya, A. Morioka, H. Misawa

    ASTROPHYSICAL JOURNAL　789　(1)　2014/07

    DOI： 10.1088/0004-637X/789/1/4 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  62. GENERATION MECHANISM OF THE SLOWLY DRIFTING NARROWBAND STRUCTURE IN THE TYPE IV SOLAR RADIO BURSTS OBSERVED BY AMATERAS Peer-reviewed

    Y. Katoh, K. Iwai, Y. Nishimura, A. Kumamoto, H. Misawa, F. Tsuchiya, T. Ono

    ASTROPHYSICAL JOURNAL　787　(1)　2014/05

    DOI： 10.1088/0004-637X/787/1/45 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  63. Long-term occurrence features of Jupiter's auroral radio emissions

    H. Misawa, M. Yoneda, T. Mizuguchi, F. Tsuchiya, A. Morioka

    Proc. 14th Symposium on Planetary Science　2014/05

  64. Substorm onset process: Ignition of auroral acceleration and related substorm phases Peer-reviewed

    Akira Morioka, Yoshizumi Miyoshi, Yasumasa Kasaba, N. Sato, Akira Kadokura, Hiroaki Misawa, Yukinaga Miyashita, Ian Mann

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　119　(2)　1044-1059　2014/02

    DOI： 10.1002/2013JA019442 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  65. Observations of Infrared and Synchrotron Emission from Jupiter during Sprint-A/EXCEED Campaign

    Kita, H, H. Misawa, F. Tsuchiya, S. Fujisawa, T. Sakanoi, Y. Kasaba

    2014惑星圏研究会集録　2014

  66. Effect of solar UV/EUV heating on the intensity and spatial distribution of Jupiter's synchrotron radiation Peer-reviewed

    H. Kita, H. Misawa, F. Tsuchiya, C. Tao, A. Morioka

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　118　(10)　6106-6115　2013/10

    DOI： 10.1002/jgra.50568 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  67. PEAK FLUX DISTRIBUTIONS OF SOLAR RADIO TYPE-I BURSTS FROM HIGHLY RESOLVED SPECTRAL OBSERVATIONS Peer-reviewed

    K. Iwai, S. Masuda, Y. Miyoshi, F. Tsuchiya, A. Morioka, H. Misawa

    ASTROPHYSICAL JOURNAL LETTERS　768　(1)　2013/05

    DOI： 10.1088/2041-8205/768/1/L2 　

    ISSN： 2041-8205

  68. Short-term Variation Phenomena in Jupiter's Radiation Belt: Their Relation with the Magnetospheric Events

    Misawa, H, T. Mizuguchi

    Proc. Symp. Planet. Sci. 2013　14　SPS2013_57　2013/05

  69. Io's volcanism controls Jupiter's radio emissions Peer-reviewed

    M. Yoneda, F. Tsuchiya, H. Misawa, B. Bonfond, C. Tao, M. Kagitani, S. Okano

    GEOPHYSICAL RESEARCH LETTERS　40　(4)　671-675　2013/02

    DOI： 10.1002/grl.50095 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  70. Effect of solar UV/EUV heating on the intensity and spatial distribution of Jupiter's synchrotron radiation Peer-reviewed

    H. Kita, H. Misawa, F. Tsuchiya, C. Tao, A. Morioka

    Journal of Geophysical Research: Space Physics　118　(10)　6105-6115　2013

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1002/jgra.50568 　

    ISSN： 2169-9402

  71. Two-element radio interferometer for the observation of Jupiter's synchrotron radiation Peer-reviewed

    Tsuchiya, F, H. Misawa, H. Kita, A. Morioka, T. Kondo

    Proc. International Symposium on Planetary Science 2011　2013

  72. Universal time control of AKR: Earth is a spin-modulated variable radio source Peer-reviewed

    Akira Morioka, Yoshizumi Miyoshi, Satoshi Kurita, Yasumasa Kasaba, Vassilis Angelopoulos, Hiroaki Misawa, Hirotsugu Kojima, James P. McFadden

    Journal of Geophysical Research: Space Physics　118　(3)　1123-1131　2013

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1002/jgra.50180 　

    ISSN： 2169-9402

  73. Geomagnetic storms and their sources on the sun: the rising phase of the sunspot cycle Peer-reviewed

    Saito, S, S.-I. Asasofu, S. Watari, N. Sato, H. Misawa

    Antarctic Record　57　(1)　1-15　2013

    DOI： 10.15094/00009679 　

    ISSN： 0085-7289

  74. A simulation study of Io-related Jovian decametric radiation: Control factor of occurrence probability Peer-reviewed

    K. Matsuda, Y. Katoh, N. Terada, H. Misawa

    Journal of Geophysical Research: Space Physics　118　(8)　5082-5098　2013

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1002/jgra.50493 　

    ISSN： 2169-9402

  75. Narrowband frequency-drift structures in solar type IV bursts Peer-reviewed

    Yukio Nishimura, Takayuki Ono, Fuminori Tsuchiya, Hiroaki Misawa, Atsushi Kumamoto, Yuto Katoh, Satoshi Masuda, Yoshizumi Miyoshi

    EARTH PLANETS AND SPACE　65　(12)　1555-1562　2013

    DOI： 10.5047/eps.2013.09.009 　

    ISSN： 1343-8832

    eISSN： 1880-5981

  76. Investigation on rapid variations of Jupiter's inner magnetosphere

    Misawa,H, T. Mizuguchi

    Proc. Symp. Planet. Sci. 2012　13　SPS2012_46　2012/12

  77. THEMIS observation of chorus elements without a gap at half the gyrofrequency Peer-reviewed

    S. Kurita, Y. Katoh, Y. Omura, V. Angelopoulos, C. M. Cully, O. Le Contel, H. Misawa

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　117　2012/11

    DOI： 10.1029/2012JA018076 　

    ISSN： 0148-0227

  78. Source location of falling tone chorus Peer-reviewed

    Satoshi Kurita, Hiroaki Misawa, Christopher M. Cully, Olivier Le Contel, Vassilis Angelopoulos

    GEOPHYSICAL RESEARCH LETTERS　39　2012/11

    DOI： 10.1029/2012GL053929 　

    ISSN： 0094-8276

  79. Polarization and direction of arrival of Jovian quasiperiodic bursts observed by Cassini Peer-reviewed

    T. Kimura, B. Cecconi, P. Zarka, Y. Kasaba, F. Tsuchiya, H. Misawa, A. Morioka

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　117　2012/11

    DOI： 10.1029/2012JA017506 　

    ISSN： 2169-9380

  80. A simulation study of the current-voltage relationship of the Io tail aurora Peer-reviewed

    K. Matsuda, N. Terada, Y. Katoh, H. Misawa

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　117　A10214　2012/10

    DOI： 10.1029/2012JA017790 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  81. Simulation study of the quasi-steady parallel electric field in the Io-Jupiter system: Excitation of the Io tail aurora and part of the Io-related Jovian decametric radiation Peer-reviewed

    Matsuda, K, N. Terada, Y. Katoh, H. Misawa

    J. Geophys. Res.　117　2012/10

    DOI： 10.1029/2012JA017790 　

  82. Effect of photo-dissociation on the spreading of OH and O clouds in Saturn's inner magnetosphere Peer-reviewed

    Hiroyasu Tadokoro, Hiroaki Misawa, Fuminori Tsuchiya, Yuto Katoh, Akira Morioka, Mizuki Yoneda

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　117　2012/09

    DOI： 10.1029/2011JA017492 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  83. IPRT/AMATERAS: A New Metric Spectrum Observation System for Solar Radio Bursts Peer-reviewed

    K. Iwai, F. Tsuchiya, A. Morioka, H. Misawa

    SOLAR PHYSICS　277　(2)　447-457　2012/04

    DOI： 10.1007/s11207-011-9919-y 　

    ISSN： 0038-0938

  84. Fundamental characteristics of field-aligned auroral acceleration derived from AKR spectra Peer-reviewed

    A. Morioka, Y. Miyoshi, N. Kitamura, H. Misawa, F. Tsuchiya, J. D. Menietti, F. Honary

    Journal of Geophysical Research: Space Physics　117　(A2)　n/a-n/a　2012/02

    DOI： 10.1029/2011ja017137 　

    ISSN： 0148-0227

    eISSN： 2169-9402

  85. Fundamental characteristics of field-aligned auroral acceleration derived from AKR spectra Peer-reviewed

    A. Morioka, Y. Miyoshi, N. Kitamura, H. Misawa, F. Tsuchiya, J. D. Menietti, F. Honary

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　117　2012/02

    DOI： 10.1029/2011JA017137 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  86. THEMIS observation of chorus elements without a gap at half the gyrofrequency Peer-reviewed

    S. Kurita, Y. Katoh, Y. Omura, V. Angelopoulos, C. M. Cully, O. Le Contel, H. Misawa

    Journal of Geophysical Research: Space Physics　117　(11)　2012

    DOI： 10.1029/2012JA018076 　

    ISSN： 2169-9402

  87. Polarization and direction of arrival of Jovian quasiperiodic bursts observed by Cassini Peer-reviewed

    T. Kimura, B. Cecconi, P. Zarka, Y. Kasaba, F. Tsuchiya, H. Misawa, A. Morioka

    Journal of Geophysical Research: Space Physics　117　(11)　2012

    DOI： 10.1029/2012JA017506 　

    ISSN： 2169-9402

    eISSN： 2169-9402

  88. A simulation study of the current-voltage relationship of the Io tail aurora Peer-reviewed

    K. Matsuda, N. Terada, Y. Katoh, H. Misawa

    Journal of Geophysical Research: Space Physics　117　(10)　2012

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2012JA017790 　

    ISSN： 2169-9402

  89. Effect of photo-dissociation on the spreading of OH and O clouds in Saturn's inner magnetosphere Peer-reviewed

    Hiroyasu Tadokoro, Hiroaki Misawa, Fuminori Tsuchiya, Yuto Katoh, Akira Morioka, Mizuki Yoneda

    Journal of Geophysical Research: Space Physics　117　(9)　2012

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2011JA017492 　

    ISSN： 2169-9402

  90. Fundamental characteristics of field-aligned auroral acceleration derived from AKR spectra Peer-reviewed

    A. Morioka, Y. Miyoshi, N. Kitamura, H. Misawa, F. Tsuchiya, J. D. Menietti, F. Honary

    Journal of Geophysical Research: Space Physics　117　(2)　2012

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2011JA017137 　

    ISSN： 2169-9402

  91. SOLAR RADIO TYPE-I NOISE STORM MODULATED BY CORONAL MASS EJECTIONS Peer-reviewed

    K. Iwai, Y. Miyoshi, S. Masuda, M. Shimojo, D. Shiota, S. Inoue, F. Tsuchiya, A. Morioka, H. Misawa

    ASTROPHYSICAL JOURNAL　744　(2)　2012/01

    DOI： 10.1088/0004-637X/744/2/167 　

    ISSN： 0004-637X

  92. Survey of Accelerated Particles in a Solar Active Region Using Hinode/XRT and Ground-Based Type-I Radio Burst Observations Peer-reviewed

    Kazumasa Iwai, Hiroaki Misawa, Fuminori Tsuchiya, Akira Morioka, Satoshi Masuda, Yoshizumi Miyoshi

    HINODE-3: THE 3RD HINODE SCIENCE MEETING　454　249-252　2012

    ISSN： 1050-3390

  93. Short-term changes in Jupiter's synchrotron radiation at 325 MHz: Enhanced radial diffusion in Jupiter's radiation belt driven by solar UV/EUV heating Peer-reviewed

    F. Tsuchiya, H. Misawa, K. Imai, A. Morioka

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　116　2011/09

    DOI： 10.1029/2010JA016303 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  94. The role of the electron convection term for the parallel electric field and electron acceleration in MHD simulations Peer-reviewed

    K. Matsuda, N. Terada, Y. Katoh, H. Misawa

    PHYSICS OF PLASMAS　18　(8)　2011/08

    DOI： 10.1063/1.3622204 　

    ISSN： 1070-664X

    eISSN： 1089-7674

  95. On the simultaneity of substorm onset between two hemispheres Peer-reviewed

    A. Morioka, Y. Miyoshi, F. Tsuchiya, H. Misawa, Y. Kasaba, T. Asozu, S. Okano, A. Kadokura, N. Sato, H. Miyaoka, K. Yumoto, G. K. Parks, F. Honary, J. G. Trotignon, P. M. E. Decreau, B. W. Reinisch

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　116　2011/04

    DOI： 10.1029/2010JA016174 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  96. Transport and loss of the inner plasma sheet electrons: THEMIS observations Peer-reviewed

    S. Kurita, Y. Miyoshi, F. Tsuchiya, Y. Nishimura, T. Hori, Y. Miyashita, T. Takada, A. Morioka, V. Angelopoulos, J. P. McFadden, H. U. Auster, J. M. Albert, V. Jordanova, H. Misawa

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　116　2011/03

    DOI： 10.1029/2010JA015975 　

    ISSN： 0148-0227

  97. Periodicity analysis of Jovian quasi-periodic radio bursts based on Lomb-Scargle periodograms Peer-reviewed

    Tomoki Kimura, Fuminori Tsuchiya, Hiroaki Misawa, Akira Morioka, Hiromasa Nozawa, Masaki Fujimoto

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　116　2011/03

    DOI： 10.1029/2010JA016076 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  98. Direct and indirect generation of Jovian quasiperiodic radio bursts by relativistic electron beams in the polar magnetosphere Peer-reviewed

    Tomoki Kimura, Fuminori Tsuchiya, Hiroaki Misawa, Akira Morioka, Yukitoshi Nishimura

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　116　2011/03

    DOI： 10.1029/2010JA016119 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  99. Whistler mode chorus enhancements in association with energetic electron signatures in the Jovian magnetosphere Peer-reviewed

    Y. Katoh, F. Tsuchiya, Y. Miyoshi, A. Morioka, H. Misawa, R. Ujiie, W. S. Kurth, A. T. Tomas, N. Krupp

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　116　2011/02

    DOI： 10.1029/2010JA016183 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  100. Short-term changes in Jupiter's synchrotron radiation at 325 MHz: Enhanced radial diffusion in Jupiter's radiation belt driven by solar UV/EUV heating Peer-reviewed

    F. Tsuchiya, H. Misawa, K. Imai, A. Morioka

    Journal of Geophysical Research: Space Physics　116　(9)　2011

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2010JA016303 　

    ISSN： 2169-9402

  101. On the simultaneity of substorm onset between two hemispheres Peer-reviewed

    A. Morioka, Y. Miyoshi, F. Tsuchiya, H. Misawa, Y. Kasaba, T. Asozu, S. Okano, A. Kadokura, N. Sato, H. Miyaoka, K. Yumoto, G. K. Parks, F. Honary, J. G. Trotignon, P. M.E. Décréau, B. W. Reinisch

    Journal of Geophysical Research: Space Physics　116　(4)　2011

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2010JA016174 　

    ISSN： 2169-9402

  102. Periodicity analysis of Jovian quasi-periodic radio bursts based on Lomb-Scargle periodograms Peer-reviewed

    Tomoki Kimura, Fuminori Tsuchiya, Hiroaki Misawa, Akira Morioka, Hiromasa Nozawa, Masaki Fujimoto

    Journal of Geophysical Research: Space Physics　116　(3)　2011

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2010JA016076 　

    ISSN： 2169-9402

    eISSN： 2169-9402

  103. Transport and loss of the inner plasma sheet electrons: THEMIS observations Peer-reviewed

    S. Kurita, Y. Miyoshi, F. Tsuchiya, Y. Nishimura, T. Hori, Y. Miyashita, T. Takada, A. Morioka, V. Angelopoulos, J. P. McFadden, H. U. Auster, J. M. Albert, V. Jordanova, H. Misawa

    Journal of Geophysical Research: Space Physics　116　(3)　2011

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2010JA015975 　

    ISSN： 2169-9402

  104. Direct and indirect generation of Jovian quasiperiodic radio bursts by relativistic electron beams in the polar magnetosphere Peer-reviewed

    Tomoki Kimura, Fuminori Tsuchiya, Hiroaki Misawa, Akira Morioka, Yukitoshi Nishimura

    Journal of Geophysical Research: Space Physics　116　(3)　2011

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2010JA016119 　

    ISSN： 2169-9402

    eISSN： 2169-9402

  105. Whistler mode chorus enhancements in association with energetic electron signatures in the Jovian magnetosphere Peer-reviewed

    Y. Katoh, F. Tsuchiya, Y. Miyoshi, A. Morioka, H. Misawa, R. Ujiie, W. S. Kurth, A. T. Tomás, N. Krupp

    Journal of Geophysical Research: Space Physics　116　(2)　2011

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2010JA016183 　

    ISSN： 2169-9402

  106. 木星準周期的電波バースト現象の励起機構

    木村 智樹, 土屋 史紀, 三澤 浩昭, 森岡 昭

    第11回惑星圏研究会収録　73　2011

  107. Radiation and excitation of Jovian Quasi-Periodic Bursts

    Kimura T, Misawa H, Morioka A, Tsuchiya F, Kasaba Y, Cecconi B, Zarka P, MacDowall RJ, Hess RA

    European Planetary Science Congress -Division for Planetary Science Joint Meeting proceeding　1　638　2011

  108. 木星内部磁気圏でのコーラス放射と放射線帯電子生成過程 Invited Peer-reviewed

    加藤雄人他

    遊星人　2011

  109. Expectation for SKA as a powerful system for Jupiter's inner magnetosphereinvestigations

    Misawa, H, F. Tsuchiya

    Proc. SKA2010 WS　2011

  110. Perspectives of future explorations of Jupiter's inner magnetosphere viewed from remote radio observations

    Misawa, H, F. Tsuchiya

    第11回惑星圏シンポジウム集録集　2011

  111. Variation characteristics of Jupiter's radio emission in the solar quiet period

    Misawa, H

    第11回惑星圏シンポジウム集録集　2011

  112. Characteristics of Jovian ionospheric Alfven resonator observed by using wave modulations of L-burst emissions Peer-reviewed

    T. Koshida, T. F. Shibata, S. Taguchi, H. Misawa

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　115　2010/12

    DOI： 10.1029/2010JA016065 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  113. Asymmetrical features of frequency and intensity in the Io-related Jovian decametric radio sources: Modeling of the Io-Jupiter system Peer-reviewed

    K. Matsuda, H. Misawa, N. Terada, Y. Katoh

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　115　2010/12

    DOI： 10.1029/2010JA015844 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  114. Two-step evolution of auroral acceleration at substorm onset Peer-reviewed

    A. Morioka, Y. Miyoshi, Y. Miyashita, Y. Kasaba, H. Misawa, F. Tsuchiya, R. Kataoka, A. Kadokura, T. Mukai, K. Yumoto, D. J. Menietti, G. Parks, K. Liou, F. Honary, E. Donovan

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　115　2010/11

    DOI： 10.1029/2010JA015361 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  115. Jupiter's magnetospheric change by Io's volcanoes Peer-reviewed

    M. Yoneda, H. Nozawa, H. Misawa, M. Kagitani, S. Okano

    GEOPHYSICAL RESEARCH LETTERS　37　2010/06

    DOI： 10.1029/2010GL043656 　

    ISSN： 0094-8276

  116. Occurrence statistics and ray tracing study of Jovian quasiperiodic radio bursts observed from low latitudes Peer-reviewed

    Tomoki Kimura, Fuminori Tsuchiya, Hiroaki Misawa, Akira Morioka, Hiromasa Nozawa

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　115　2010/05

    DOI： 10.1029/2009JA014647 　

    ISSN： 0148-0227

  117. Asymmetrical features of frequency and intensity in the Io-related Jovian decametric radio sources: Modeling of the Io-Jupiter system Peer-reviewed

    K. Matsuda, H. Misawa, N. Terada, Y. Katoh

    Journal of Geophysical Research: Space Physics　115　(12)　2010

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2010JA015844 　

    ISSN： 2169-9402

  118. Characteristics of Jovian ionospheric Alfvn resonator observed by using wave modulations of L-burst emissions Peer-reviewed

    T. Koshida, T. F. Shibata, S. Taguchi, H. Misawa

    Journal of Geophysical Research: Space Physics　115　(12)　2010

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2010JA016065 　

    ISSN： 2169-9402

  119. Multi-frequency total flux measurements of Jupiter’s synchrotron radiation in 2007 Peer-reviewed

    F. Tsuchiya, H. Misawa, K. Imai, A. Morioka, T. Kondo

    Advances in Geosciences: Volume 19: Planetary Science (PS)　19　601-612　2010/01/01

    Publisher: World Scientific Publishing Co.

    DOI： 10.1142/9789812838162_0045 　

  120. イオ関連デカメートル電波発生源の準定常構造に関する計算機実験 Peer-reviewed

    松田和也, 三澤浩昭, 寺田直樹, 加藤雄人

    SENAC　43　(2)　67-74　2010

  121. 太陽活動静穏期における木星電波の時間変動特性

    三澤浩昭

    第11回惑星圏研究会集録　2010

  122. Expectation for SKA as a powerful system for Jupiter's inner magnetosphere investigations

    Misawa, H, F. Tsuchiya

    Proc. Japan SKA Workshop 2010　2010

  123. 電波観測に基づく木星内部磁気圏探査への展望

    三澤浩昭, 土屋史紀

    第11回惑星圏研究会集録　2010

  124. GMRT Observations of Jupiter's Synchrotron Radio Emission at 610 MHz Peer-reviewed

    Anil Bhardwaj, C. H. Ishwara-Chandra, N. Udaya Shankar, Hiroaki Misawa, Kota Imai, Yoshizumi Miyoshi, Fuminori Tsuchiya, Tetsuro Kondo, Akira Morioka

    LOW-FREQUENCY RADIO UNIVERSE　407　369-+　2009

  125. A Jovian Small Orbiter for Magnetospheric and Auroral Studies with the Solar-Sail Project Peer-reviewed

    Y. Kasaba, T. Takashima, H. Misawa

    FUTURE PERSPECTIVES OF SPACE PLASMA AND PARTICLE INSTRUMENTATION AND INTERNATIONAL COLLABORATIONS　1144　228-+　2009

    DOI： 10.1142/6494-vol7 　

    ISSN： 0094-243X

  126. Vertical evolution of auroral acceleration at substorm onset Peer-reviewed

    A. Morioka, Y. Miyoshi, F. Tsuchiya, H. Misawa, K. Yumoto, G. K. Parks, R. R. Anderson, J. D. Menietti, F. Honary

    ANNALES GEOPHYSICAE　27　(2)　525-535　2009

    DOI： 10.5194/angeo-27-525-2009 　

    ISSN： 0992-7689

    eISSN： 1432-0576

  127. Storm-time electron flux precipitation in the inner radiation belt caused by wave-particle interactions Peer-reviewed

    H. Tadokoro, F. Tsuchiya, Y. Miyoshi, Y. Katoh, A. Morioka, H. Misawa

    Annales Geophysicae　27　(4)　1669-1677　2009

    DOI： 10.5194/angeo-27-1669-2009 　

    ISSN： 0992-7689 1432-0576

  128. 木星電波の発生域の考察

    三澤浩昭, 土屋史紀, 森岡昭, 野澤宏大

    第10回惑星圏研究会集録　2009

  129. 赤道横断磁気ループ(TEL)型太陽爆発に伴う新型磁気嵐 Peer-reviewed

    斎藤尚生, 三澤浩昭, 佐藤夏雄, 赤祖父俊一, W. Sun, C. S. Deehr

    南極資料　53　(3)　233-258　2009

    DOI： 10.15094/00009506 　

    ISSN： 0085-7289

  130. A Jovian Small Orbiter for Magnetospheric and Auroral Studies with the Solar-Sail Project Peer-reviewed

    Y. Kasaba, T. Takashima, H. Misawa

    FUTURE PERSPECTIVES OF SPACE PLASMA AND PARTICLE INSTRUMENTATION AND INTERNATIONAL COLLABORATIONS　1144　228-+　2009

    DOI： 10.1063/1.3169297 　

    ISSN： 0094-243X

  131. Radiation characteristics of quasi-periodic radio bursts in the Jovian high-latitude region Peer-reviewed

    Tomoki Kimura, Fuminori Tsuchiya, Hiroaki Misawa, Akira Morioka, Hiromasa Nozawa

    PLANETARY AND SPACE SCIENCE　56　(15)　1967-1976　2008/12

    DOI： 10.1016/j.pss.2008.09.021 　

    ISSN： 0032-0633

  132. Investigation of local time dependence of Mercury's sodium exosphere based on a numerical simulation Peer-reviewed

    Hiroaki Misawa, Aya Sonobe, Akira Morioka, Shoichi Okano

    PLANETARY AND SPACE SCIENCE　56　(13)　1681-1687　2008/11

    DOI： 10.1016/j.pss.2008.07.029 　

    ISSN： 0032-0633

  133. AKR breakup and auroral particle acceleration at substorm onset Peer-reviewed

    A. Morioka, Y. Miyoshi, F. Tsuchiya, H. Misawa, K. Yumoto, G. K. Parks, R. R. Anderson, J. D. Menietti, E. F. Donovan, F. Honary, E. Spanswick

    Journal of Geophysical Research: Space Physics　113　(9)　2008/09/01

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2008JA013322 　

    ISSN： 2169-9402

  134. AKR breakup and auroral particle acceleration at substorm onset Peer-reviewed

    A. Morioka, Y. Miyoshi, F. Tsuchiya, H. Misawa, K. Yumoto, G. K. Parks, R. R. Anderson, J. D. Menietti, E. F. Donovan, F. Honary, E. Spanswick

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　113　(A9)　2008/09

    DOI： 10.1029/2008JA013322 　

    ISSN： 2169-9380

    eISSN： 2169-9402

  135. Occurrence and source characteristics of the high-latitude components of Jovian broadband kilometric radiation Peer-reviewed

    Tomoki Kimura, Fuminori Tsuchiya, Hiroaki Misawa, Akira Morioka, Hiromasa Nozawa

    PLANETARY AND SPACE SCIENCE　56　(8)　1155-1168　2008/06

    DOI： 10.1016/j.pss.2008.03.001 　

    ISSN： 0032-0633

  136. 木星電波の情報とは?

    三澤浩昭

    第9回惑星圏研究会集録　2008

  137. 木星磁気圏内でのピックアップイオンの熱化に関する計算機実験 Invited Peer-reviewed

    加藤雄人

    SENAC　41　2008/01

  138. Observation of Mercury's sodium exosphere by MSASI in the BepiColombo mission Peer-reviewed

    I. Yoshikawa, S. Kameda, K. Matsuura, K. Hikosaka, G. Murakami, K. Yoshioka, H. Nozawa, D. Rees, S. Okano, H. Misawa, A. Yamazaki, O. Korablev

    PLANETARY AND SPACE SCIENCE　55　(11)　1622-1633　2007/09

    DOI： 10.1016/j.pss.2006.01.010 　

    ISSN： 0032-0633

  139. Dual structure of auroral acceleration regions at substorm onsets as derived from auroral kilometric radiation spectra Peer-reviewed

    A. Morioka, Y. Miyoshi, F. Tsuchiya, H. Misawa, T. Sakanoi, K. Yumoto, R. R. Anderson, J. D. Menietti, E. F. Donovan

    Journal of Geophysical Research: Space Physics　112　(6)　2007/06/01

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2006JA012186 　

    ISSN： 2169-9402

  140. Micro-type III radio bursts Peer-reviewed

    Akira Morioka, Yoshizumi Miyoshi, Satoshi Masuda, Fuminori Tsuchiya, Hiroaki Misawa, Hiroshi Matsumoto, Kozo Hashimoto, Hiroshi Oya

    ASTROPHYSICAL JOURNAL　657　(1)　567-576　2007/03

    DOI： 10.1086/510507 　

    ISSN： 0004-637X

  141. 木星広帯域キロメータ電波の出現特性と発生機構

    木村 智樹, 土屋 史紀, 三澤 浩昭, 森岡 昭

    惑星電磁圏・大気圏研究会集録　93　2007

  142. Investigations of plasma environment of Jupiter's polar upper ionosphere by spectrum analysis of auroral radio emissions

    Misawa, H, A. Morioka, H. Nozawa, F. Tsuchiya

    Proceedings of the 39th ISAS Lunar and Planetary Symposium　2007

  143. Development of a dual frequency system for the observation of the Jovian Synchrotron Radiation using the Iitate Planetary Radio Telescope (IPRT)

    Imai, K, H. Misawa, F. Tsuchiya, A. Morioka, T. Watanabe, R. Kudo

    Proceedings of the 39th ISAS Lunar and Planetary Symposium　2007

  144. Characteristics of short term variations of the Jovian synchrotron radiation at a frequency of 327MHz

    Nomura, S, H. Misawa, F. Tsuchiya, A. Morioka

    Proceedings of the 39th ISAS Lunar and Planetary Symposium　2007

  145. Response of Jovian magnetospheric activity to the polarity change of Interplanetary Magnetic Field Invited Peer-reviewed

    Kimura, T, F. Tsuchiya, H. Misawa, A. Morioka

    Proceedings of the 39th ISAS Lunar and Planetary Symposium　2007

  146. Source of high energy electrons in Saturn's outer magnetosphere Invited

    Kawaragi, K, A. Morioka, H. Misawa, F. Tsuchiya

    Proceedings of the 39th ISAS Lunar and Planetary Symposium　2007

  147. Investigations of the Local Time dependence of Mercury's sodium exosphere based on a numerical simulation

    Sonobe, A, H. Misawa, A. Morioka, S. Okano

    Proceedings of the 39th ISAS Lunar and Planetary Symposium　2007

  148. 木星電波の長期変動

    三澤浩昭, 森岡昭, 土屋史紀

    第8回惑星圏研究会集録集　2007

  149. Implication for the solar wind effect on the Io plasma torus Peer-reviewed

    H. Nozawa, H. Misawa, M. Kagitani, F. Tsuchiya, S. Takahashi, A. Morioka, T. Kimura, S. Okano, H. Yamamoto, R. Sood

    GEOPHYSICAL RESEARCH LETTERS　33　(16)　2006/08

    DOI： 10.1029/2005GL025623 　

    ISSN： 0094-8276

  150. Rotationally driven quasi-periodic radio emissions in the Jovian magnetosphere Peer-reviewed

    A. Morioka, H. Nozawa, H. Misawa, F. Tsuchiya, Y. Miyoshi, T. Kimura, W. Kurth

    Journal of Geophysical Research: Space Physics　111　(4)　2006/04/01

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2005JA011563 　

    ISSN： 2169-9402

    eISSN： 2169-9402

  151. Rotationally driven quasi-periodic radio emissions in the Jovian magnetosphere Peer-reviewed

    A Morioka, H Nozawa, H Misawa, F Tsuchiya, Y Miyoshi, T Kimura, W Kurth

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　111　(A4)　2006/04

    DOI： 10.1029/2005JA011563 　

    ISSN： 0148-0227

  152. How tenuous is Jupiter’s polar upper ionosphere? - Diagnosis by using Jupiter’s auroral radio emission -

    Misawa, H, H. Nozawa, A. Morioka, F. Tsuchiya

    Proc. 2nd Kanazawa Workshop on Waves in Plasmas　2006/03

  153. Observation of the sodium exosphere from mercury magnetospheric orbiter Peer-reviewed

    Ichiro Yoshikawa, Hiromasa Nozawa, Shingo Kameda, Shoichi Okano, Hiroaki Misawa

    MERCURY, MARS AND SATURN　38　(4)　659-+　2006

    DOI： 10.1016/j.asr.2005.05.134 　

    ISSN： 0273-1177

  154. Occurrence characteristics and source mechanisms of Quasi-Periodic LF/VLF radio burst from Jovian polar magnetosphere (木星極域磁気圏起源準周期的 LF/VLF 電波バースト現象 の出現特性と発生機構)

    Kimura Tomoki, Morioka Akira, Misawa Hiroaki, Tsuchiya Fuminori, Nozawa Hiromasa

    第62回生存圏シンポジウム 第13回 生存圏波動分科会 プロシーディング　WAVE13　2006

  155. Initial results of Husafell solar radio spectrograph Peer-reviewed

    Hiyama, Y, T. Ono, M. Iizima, H. Misawa, F Tsuchiya, A. Morioka, N. Sato

    Advances in Polar Upper Atmosphere Research　20　76-85　2006

  156. 電波観測から探る木星極域電離圏の姿 -Io-DAM Faraday回転解析の初期結果-

    三澤浩昭, 森岡昭, 野澤宏大, 土屋史紀

    第7回惑星圏研究会集録　2006

  157. Investigation of dynamics of the Jovian radiation belt by a multi-frequency observation

    Misawa, H, F. Tsuchiya, S. Nomura, A. Morioka, Y. Miyoshi, T. Kondo

    Proc. 38th ISAS Lunar Planet. Symp.　2006

  158. 月面低周波電波天文計画-II

    河野宣之, 野田寛大, 井上充, 氏原秀樹, 松本甲太郎, 岩田隆浩, 宮原啓, 森岡昭, 三澤浩昭, 小野高幸, 土屋史紀

    第7回惑星圏研究会集録　2006

  159. Small Jovian Orbitor for Magnetospheric and Auroal Studies

    笠羽康正, 三澤浩昭, 高島健, 川口淳一郎, 木星小オービターサブWG, ソーラーセールWG

    第7回惑星圏研究会集録　2006

  160. ソーラーセール計画における木星小型周回探査（含：木星Flyby探査）

    笠羽康正, 高島健, 三澤浩昭, 木星小衛星検討サブWG, 川口淳一郎, ソーラーセールWG

    第６回宇宙科学シンポジウム集録　2006

  161. 木星探査機搭載用広帯域デジタル電波受信機の基礎研究

    越田友則, 小野高幸, 飯島雅英, 熊本篤志, 三澤浩昭, 土屋史紀

    第６回宇宙科学シンポジウム集録　2006

  162. micro Type III burst 群と太陽面現象－Akebono, Geotail観測

    森岡昭, 三澤浩昭, 土屋史紀, 三好由純, 松本紘, 橋本弘蔵, 大家寛

    第６回宇宙科学シンポジウム集録　2006

  163. Observation of the sodium exosphere from mercury magnetospheric orbiter Peer-reviewed

    Ichiro Yoshikawa, Hiromasa Nozawa, Shingo Kameda, Shoichi Okano, Hiroaki Misawa

    ADVANCES IN SPACE RESEARCH　38　(4)　659-663　2006

    DOI： 10.1016/j.asr.2005.05.134 　

    ISSN： 0273-1177

    eISSN： 1879-1948

  164. Dynamic features of Io's extended sodium distributions Peer-reviewed

    S Takahashi, H Misawa, H Nozawa, A Morioka, S Okano, R Sood

    ICARUS　178　(2)　346-359　2005/11

    DOI： 10.1016/j.icarus.2005.08.006 　

    ISSN： 0019-1035

  165. Auroral kilometric radiation activity during magnetically quiet periods Peer-reviewed

    A Morioka, YS Miyoshi, F Tsuchiya, H Misawa, A Kumamoto, H Oya, H Matsumoto, K Hashimoto, T Mukai

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　110　(A11)　2005/11

    DOI： 10.1029/2005JA011204 　

    ISSN： 0148-0227

  166. Relationship between the Jovian magnetospheric plasma density and Io torus emission Peer-reviewed

    H Nozawa, H Misawa, S Takahashi, A Morioka, S Okano, R Sood

    GEOPHYSICAL RESEARCH LETTERS　32　(11)　2005/06

    DOI： 10.1029/2005GL022759 　

    ISSN： 0094-8276

  167. Auroral kilometric radiation and magnetosphere-ionosphere coupling process during magnetic storms Peer-reviewed

    T Seki, A Morioka, YS Miyoshi, F Tsuchiya, H Misawa, W Gonzalez, T Sakanoi, H Oya, H Matsumoto, K Hashimoto, T Mukai

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　110　(A5)　2005/05

    DOI： 10.1029/2004JA010961 　

    ISSN： 0148-0227

  168. Expectation for Jupiter Polar Orbitor

    三澤浩昭

    Proc. 4th Planetary Elctro-magnetosphere and Atmosphere Symp.　2005/03

  169. Auroral kilometric radiation activity during magnetically quiet periods Peer-reviewed

    A. Morioka, Y. S. Miyoshi, F. Tsuchiya, H. Misawa, A. Kumamoto, H. Oya, H. Matsumoto, K. Hashimoto, T. Mukai

    Journal of Geophysical Research: Space Physics　110　(11)　2005

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2005JA011204 　

    ISSN： 2169-9402

  170. Auroral kilometric radiation and magnetosphere-ionosphere coupling process during magnetic storms Peer-reviewed

    T. Seki, A. Morioka, Y. S. Miyoshi, F. Tsuchiya, H. Misawa, W. Gonzalez, T. Sakanoi, H. Oya, H. Matsumoto, K. Hashimoto, T. Mukai

    Journal of Geophysical Research: Space Physics　110　(5)　2005

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2004JA010961 　

    ISSN： 2169-9402

  171. Mercury Sodium Atmosphere Spectral Imager (MSASI) Peer-reviewed

    Nozawa, H, I. Yoshikawa, S. Kameda, H. Misawa, S. Okano, M. Taguchi, A. Yamazaki, Y. Kasaba, K. Takamizawa, O. Korablev

    JAXA Research and Development Report　5　JAXA-RR-05-007E-52　2005

    Publisher: Japan Aerospace Exploration Agency

    ISSN： 1349-1113

    More details Close

    The Mercury Sodium Atmosphere Spectral Imager (MSASI) on the BepiColombo/Mercury Magnetospheric Orbiter (MMO) is a high-dispersion Fabry-Perot imager. MSASI will address a wealth of fundamental scientific questions pertaining to the Mercury's exosphere. Together, our measurement on the overall scale will provide ample new information on regolith-exospheremagnetosphere coupling as well as new understanding of the dynamics governing the 'surfacebounded exosphere'. It arises quite clearly from continuous ground-based observations that the regolith of Mercury releases a fraction of its content to Mercury's exosphere. Some processes are identified up to now as leading to this ejection. These processes are associated with different energies of ejection, behavior in different regions of Mercury's surface and eject different types of population from the surface. The responsible processes are (1) Chemical sputtering, (2) Thermal desorption, (3) Photon-stimulated desorption, (4) Ion sputtering, and (5) Micro-meteoroid impact/vaporization. Each candidate seems to be fairly operative, but any cannot completely explain phenomena observed from the Earth. Also, the fate of ejecta from the regolith is still unknown. Some are expected to return to the lithosphere, the other are lost to interplanetary space. Circulation of lithospheric sodium atoms via exosphere-magnetosphere might bring a significant change in the composition of surface layer on Mercury. The MSASI measurements clearly and definitely can identify the release mechanism, how exospheric sodium is born from the regolith, and bring comprehensive picture of global circulation of regolith materials. Also, BepiColombo is the first and unique opportunity to study the formation, circulation, maintenance of this surface-bounded exosphere, which is a different type of terrestrial atmosphere. Below we describe in somewhat more detail the primary scientific objectives of MSASI.

  172. Development of the observation system for the Jovian synchrotron radiation using an aperture synthesis array Peer-reviewed

    Watanabe, T, H. Misawa, F. Tsuchiya, Y. Miyoshi, T. Abe, A. Morioka

    Tohoku Geophys. J.　37　(1)　1-90　2005

    Publisher: Faculty of Science, Tohoku University

    ISSN： 0040-8794

  173. 月面低周波電波観測天文台 －太陽・惑星電波研究における意義と初期電波受信系の検討－

    三澤浩昭, 近藤哲朗, 今井一雅, 森岡 昭, 土屋史紀, 月面低周波電波天文研究会

    第27回ＩＳＡＳ太陽系科学シンポジウム集録集　2005

  174. 月からの低周波電波観測：初期受信システムの検討

    三澤浩昭, 土屋史紀, 近藤哲朗, 竹内 央, 小野高幸, 森岡昭, 月面低周波電波天文研究会

    第6回惑星電磁圏・大気圏研究会集録　2005

  175. Investigation of the origin of Io-related decametric radiation: Consideration of polarization characteristics

    Hiroaki Misawa

    Proc. 37th ISAS Lunar Planet. Symp.　2004/12

  176. H-3(+) emissions in the Jovian sub-auroral region and auroral activity Peer-reviewed

    A Morioka, S Yaegashi, H Nozawa, H Misawa, YS Miyoshi, F Tsuchiya, S Okano

    GEOPHYSICAL RESEARCH LETTERS　31　(16)　2004/08

    DOI： 10.1029/2004GL020390 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  177. Ground-based observation for Jupiter's planetosphere by Tohoku University

    三澤浩昭, 森岡昭, 岡野章一, 小野高幸, 飯島雅英, 土屋史紀

    Proc. 4th CAWSES Electro-Magnetosphere Symp.　2004/08

  178. Long-term variability of [SII] emissions from the Io plasma torus between 1997 and 2000 Peer-reviewed

    H Nozawa, H Misawa, S Takahashi, A Morioka, S Okano, R Sood

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　109　(A7)　2004/07

    DOI： 10.1029/2003JA010241 　

    ISSN： 0148-0227

  179. Source characteristics and radiation mechanism of Jovian anomalous continuum Peer-reviewed

    A Morioka, T Yuasa, YS Miyoshi, F Tsuchiya, H Misawa

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　109　(A6)　2004/06

    DOI： 10.1029/2004JA010409 　

    ISSN： 0148-0227

  180. Source characteristics and radiation mechanism of Jovian anomalous continuum Peer-reviewed

    A. Morioka, T. Yuasa, Y. S. Miyoshi, F. Tsuchiya, H. Misawa

    Journal of Geophysical Research: Space Physics　109　(6)　2004

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2004JA010409 　

    ISSN： 2169-9402

  181. Long-term variability of [SII] emissions from the Io plasma torus between 1997 and 2000 Peer-reviewed

    H. Nozawa, H. Misawa, S. Takahashi, A. Morioka, S. Okano, R. Sood

    Journal of Geophysical Research: Space Physics　109　(7)　2004

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2003JA010241 　

    ISSN： 2169-9402

  182. Investigations of the Jovian inner magnetosphere using the EISCAT radar system

    三澤浩昭, 森岡昭, 土屋史紀, 三好由純, 渡邉拓男, 野村詩穂, 近藤哲朗

    Proc. on Future of Science on EISCAT　2004/01

  183. Investigations of the Jovian inner magnetosphere by spectrum observation of synchrotron radiation

    Misawa, H, F. Tsuchiya, Y. Miyoshi, H. Nozawa, A. Morioka, T. Watanabe, S. Nomura, T. Kondo

    Proc. 36th ISAS Lunar Planet. Symp.　2003/12

  184. Development of a primary feed system for the parabolic rectangular reflector antenna dedicated for planetary radio emission

    Misawa, H, R. Kudo, F. Tsuchiya, A. Morioka, T. Kondo

    Proc. 3rd CRL TDC Symp.　2003/12

  185. Investigations of the Jovian inner magnetosphere by spectrum observation of synchrotron radiation

    三澤浩昭, 土屋史紀, 森岡昭, 三好由純, 渡邉拓男, 野村詩穂, 近藤哲朗

    Proc. 7th Wave Sicence Working Group Meeting　2003/09

  186. AKR disappearance during magnetic storms Peer-reviewed

    A Morioka, Y Miyoshi, T Seki, F Tsuchiya, H Misawa, H Oya, H Matsumoto, K Hashimoto, T Mukai, K Yumoto, T Nagatsuma

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　108　(A6)　2003/06

    DOI： 10.1029/2002JA009796 　

    ISSN： 0148-0227

  187. A study of distribution characteristics of Mercury’s atmosphere: Current status of a model calculation and ground-based observation

    三澤浩昭, 高見澤広司

    Proc. 2nd Planetary Electro-Magnetosphere and Atmosphere Symp.　2003/03

  188. AKR disappearance during magnetic storms Peer-reviewed

    A. Morioka, Y. Miyoshi, T. Seki, F. Tsuchiya, H. Misawa, H. Oya, H. Matsumoto, K. Hashimoto, T. Mukai, K. Yumoto, T. Nagatsuma

    Journal of Geophysical Research: Space Physics　108　(6)　2003

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2002JA009796 　

    ISSN： 2169-9402

  189. Rebuilding process of the outer radiation belt during the 3 November 1993 magnetic storm: NOAA and Exos-D observations Peer-reviewed

    Yoshizumi Miyoshi, Akira Morioka, Takahiro Obara, Hiroaki Misawa, Tsugunobu Nagai, Yoshiya Kasahara

    Journal of Geophysical Research: Space Physics　108　(1)　2003

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/2001JA007542 　

    ISSN： 2169-9402

  190. Radiation tests of optical glasses for BepiColombo/MMO imaging camera Peer-reviewed

    H. Misawa, I. Yoshikawa, T. Takashima, R. Honda, Y. Uchihori, H. Kitamura, N. Takeyama

    Report of Institute of Space and Astronautical Science　2003

  191. Rebuilding process of the outer radiation belt during the 3 November 1993 magnetic storm: NOAA and Exos-D observations Peer-reviewed

    Y Miyoshi, A Morioka, T Obara, H Misawa, T Nagai, Y Kasahara

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　108　(A1)　2003/01

    DOI： 10.1029/2001JA007542 　

    ISSN： 0148-0227

  192. Jupiter's radio waves and Investigations of the magnetosphere

    三澤浩昭

    Proc. 5th SGEPSS Wave Science Group Symp.　2002/09

  193. Spectrum observation of Jupiter's synchrotorn radiation at the frequencies of 325, 929, and 2250MHz: Plan and present status

    H. Misawa, A. Morioka, F. Tsuchiya, Y. Miyoshi, T. Kondo

    Proc. 35th ISAS Lunar Planet. Symp.　207-210　2002

  194. Investigations of distribution characteristics of Mercury's atmosphere: Studies based on a model calculation and ground-base observation

    H. Misawa, A. Morioka, S, Okano, K. Takamizawa

    Proc. 35th ISAS Lunar Planet. Symp.　199-202　2002

  195. Duration of Jovian magnetospheric disturbances inferred from decametric radio storms Peer-reviewed

    A Morioka, F Tsuchiya, Y Miyoshi, H Misawa, H Oya, K Furukawa

    EARTH PLANETS AND SPACE　54　(12)　1277-1281　2002

    DOI： 10.1186/BF03352455 　

    ISSN： 1343-8832

  196. Extended distributions of Iogenic sodium atoms and their release mechanisms

    Takahashi, S, H. Misawa, H. Nozawa, N. Washio, A. Morioka, S. Okano

    Proc. 34th ISAS Lunar Planet. Symp.　65-68　2001/08

  197. Sodium cloud distribution around Io

    Suzuki,S, S. Takahashi, H. Nozawa, H. Misawa, A. Morioka, S. Okano

    Proc. 34th ISAS Lunar Planet. Symp.　61-64　2001/08

  198. Imaging observation of the Io plasma torus

    Nozawa, H, H. Misawa, S. Takahashi, A. Morioka, S. Okano

    Proc. 34th ISAS Lunar Planet. Symp.　57-60　2001/08

  199. Pitch angle distribution of relativistic electrons in the inner radiation belt and its relation to equatorial plasma wave turbulence phenomena Peer-reviewed

    A Morioka, H Misawa, Y Miyoshi, H Oya, M Iizima, T Nagai

    GEOPHYSICAL RESEARCH LETTERS　28　(5)　931-934　2001/03

    DOI： 10.1029/2000GL011886 　

    ISSN： 0094-8276

  200. Newly developed meter to decimeter wave range radio telescope for the investigation of planetary environments

    H. Misawa, A. Morioka, F. Tsuchiya, Y. Miyoshi, T. Watanabe, R. Kudo, T. Kondo

    Proc. 34th ISAS Lunar Planet. Symp.　175-178　2001

  201. Velocity fluctuations in the interplanetary scintillation pattern Peer-reviewed

    Chashei, IV, Shishov, VI, M Kojima, H Misawa

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　105　(A12)　27409-27417　2000/12

    DOI： 10.1029/2000JA900107 　

    ISSN： 0148-0227

  202. Release mechanism of extended sodium atoms originated from Jovian satellite Io

    Takahashi, S, H.Misawa, H. Nozawa, N. Washio, A. Morioka, S. Okano

    Proceedings of 33rd Lunar and Planetary Symposium　145-148　2000/08

  203. Long term modulation of low altitude proton radiation belt by the earth's atmosphere Peer-reviewed

    Y. Miyoshi, A. Morioka, H. Misawa

    Geophysical Research Letters　27　(14)　2169-2172　2000/07/15

    Publisher: American Geophysical Union

    DOI： 10.1029/1999GL003721 　

    ISSN： 0094-8276

  204. Observation of short term variation of Jovian synchrotron radiation at a frequency of 2290MHz Peer-reviewed

    Y Miyoshi, H Misawa, A Morioka, T Kondo, Y Koyama, J Nakajima

    PLANETARY IONOSPHERES AND MAGNETOSPHERES　26　(10)　1533-1536　2000

    ISSN： 0273-1177

  205. Variability of [SII] emission from the Io plasma torus Peer-reviewed

    H Nozawa, H Misawa, S Takahashi, A Morioka, S Okano, R Sood, K Yumoto

    PLANETARY IONOSPHERES AND MAGNETOSPHERES　26　(10)　1525-1528　2000

    ISSN： 0273-1177

  206. Distribution of sodium cloud near Io and in the inner Jovian magnetosphere Peer-reviewed

    S Takahashi, H Misawa, H Nozawa, A Morioka, R Sood, S Okano, K Yumoto

    PLANETARY IONOSPHERES AND MAGNETOSPHERES　26　(10)　1529-1532　2000

    ISSN： 0273-1177

  207. On the sources of Jovian hectometric radiation Peer-reviewed

    F Nakagawa, A Morioka, H Misawa

    PLANETARY IONOSPHERES AND MAGNETOSPHERES　26　(10)　1541-1544　2000

    ISSN： 0273-1177

  208. Investigations of the origin of Io-related decametric radiation: Preliminary results of the 3D ray tracing analysis using a new global magnetic field model

    H. Misawa

    Proceedings of the 33rd ISAS Lunar and Planetary Symposium　157-160　2000

  209. Model calculation of neutral sodium atmosphere of Mercury

    K. Takamizawa, H. Misawa, A. Morioka

    Proceedings of the 33rd ISAS Lunar and Planetary Symposium　149-152　2000

  210. Observations of Jovian decimetric radiation at a frequency of 327MHz Peer-reviewed

    H. Misawa, A. Morioka

    Advances in Space Research　26　(10)　1537-1540　2000

    Publisher: Elsevier Ltd

    DOI： 10.1016/S0273-1177(00)00087-9 　

    ISSN： 0273-1177

  211. Distribution and dynamics of sodium atoms originated from Jovian satellite Io

    Takahashi, S, H. Misawa, H. Nozawa, A. Morioka, S. kano, R. Sood

    Proceedings of the 32nd ISAS Lunar and Planetary Symposium　224-227　1999/08

  212. Observations of the Io plasma torus with a transportable telescope system

    Nozawa, H, H. Misawa, S. Takahashi, A. Morioka, S. Okano, R. Sood

    Proceedings of the 32nd ISAS Lunar and Planetary Symposium　220-223　1999/08

  213. Jovian electron modulations by the solar wind interaction with the magnetosphere Peer-reviewed

    F Tsuchiya, A Morioka, H Misawa

    EARTH PLANETS AND SPACE　51　(9)　987-996　1999

    DOI： 10.1186/BF03351569 　

    ISSN： 1343-8832

  214. Observation of short-term variation of Jupiter's synchrotron radiation Peer-reviewed

    Y Miyoshi, H Misawa, A Morioka, T Kondo, Y Koyama, J Nakajima

    GEOPHYSICAL RESEARCH LETTERS　26　(1)　9-12　1999/01

    DOI： 10.1029/1998GL900244 　

    ISSN： 0094-8276

  215. Observations of volcanic gases originated from Io-IV

    H.Misawa, S.Takahashi, H.Nozawa, N.Washio, A.Morioka, S.Okano, R.Sood

    Proceedings of the 21st Solar System Science Symposium　83-86　1999

  216. Periodic LF wave radiation associated with pulsating aurora Peer-reviewed

    Takizawa,H, A. Morioka, H. Misawa, H. Miyaoka

    Proc. NIPR Symp. Upper Atmos. Phys.　11　11, 61-71-71　1998

    Publisher: National Institute of Polar Research

    ISSN： 0914-5613

    More details Close

    The pulsating aurora accompanied with LF waves was found from the observation by the ground-based SIT all-sky TV and a sounding rocket S-520-12 launched from Andφya, Norway at 0206 : 00 UT on February 26,1990. On the basis of the correlation analysis, the LF waves lagged behind auroral emission by 8s. This evidence is explained by the assumption that the pulsating LF waves were generated by precipitating low energy electrons modulated near the magnetic equator simultaneously with high energy auroral electrons causing the auroral emission. It was also derived from the ray tracing method, that the LF waves were generated in the altitude range from 2000km to 4700km along the magnetic field line of L=6.7 on which pulsating auroral patch existed.

  217. Observations of the volcanic gases originated from Io

    H.Misawa, S. Takahashi, H. Nozawa, A.Morioka, R.Sood, S. Okano, K. Yumoto

    Proceedings of the 31st ISAS Lunar and Planetary Symposium　46-49　1998

  218. Observations off the volcanic gases originated from Io-III

    H.Misawa, S.Takahashi, H.Nozawa, A.Morioka, R.Sood, S.Okano, K.Yumoto

    Proc. 20th ISAS Solar System Sci.　13-16　1998

  219. Calibration of gain and phase for a phased array system installed on a radio telescope Peer-reviewed

    Kikuo Asai, Masayoshi Kojima, Yoshio Ishida, Kazuo Maruyama, Naohiko Yoshimi, Hiroaki Misawa, Kazuhide Miyasato

    Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi)　80　(8)　28-38　1997

    Publisher: John Wiley and Sons Inc.

    DOI： 10.1002/(SICI)1520-6424(199708)80:8<28::AID-ECJA4>3.0.CO;2-0 　

    ISSN： 8756-6621

  220. Modulation of Jovian electrons by the solar wind Peer-reviewed

    A. Morioka, F. Tsuchiya, H. Misawa

    Advances in Space Research　20　(2)　205-208　1997

    Publisher: Elsevier Ltd

    DOI： 10.1016/S0273-1177(97)00534-6 　

    ISSN： 0273-1177

  221. Polarization characteristics of Io-related Jovian decametric radiations Peer-reviewed

    H Misawa, H Oya, M Iizima

    JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY　49　S67-S78　1997

    DOI： 10.5636/jgg.49.Supplement_S67 　

    ISSN： 0022-1392

  222. Design of an asymmetric parabolic cylinder antenna with high aperture efficiency

    Kikuo Asai, Masayoshi Kojima, Hiroaki Misawa, Yoshio Ishida, Kazuo Maruyama, Naohiko Yoshimi, Masaaki Wakasa, Masue Karakida

    Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi)　79　(2)　11-21　1996

    Publisher: John Wiley and Sons Inc.

    DOI： 10.1002/ecja.4410790202 　

    ISSN： 8756-6621

  223. Acceleration phenomena observed by interplanetary scintillation at 0.1-0.3 AU Peer-reviewed

    M. Kojima, H. Misawa, H. Watanabe, Y. Yamauchi

    Astrophysics and Space Science　243　(1)　229-237　1996

    Publisher: Springer Netherlands

    DOI： 10.1007/BF00644061 　

    ISSN： 0004-640X

  224. IPS observations at STELAB for the fruitful coming decade Peer-reviewed

    K. Asai, Y. Ishida, M. Kojima, K. Maruyama, H. Misawa, N. Yoshimi

    Astrophysics and Space Science　243　(1)　247-250　1996

    Publisher: Springer Netherlands

    DOI： 10.1007/BF00644063 　

    ISSN： 0004-640X

  225. Dependence of velocity fluctuations on solar wind speeds from an IPS analysis method Peer-reviewed

    H Misawa, M Kojima

    SOLAR WIND EIGHT - PROCEEDINGS OF THE EIGHTH INTERNATIONAL SOLAR WIND CONFERENCE　(382)　113-116　1996

    ISSN： 0094-243X

  226. Micro-turbulence in the solar wind at 5-76 Rs observed with interplanetary scintillation Peer-reviewed

    Y Yamauchi, M Kojima, M Tokumaru, H Misawa, H Mori, T Tanaka, H Takaba, T Kondo, PK Manoharan

    JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY　48　(10)　1201-1217　1996

    ISSN： 0022-1392

  227. Investigation of Jovian inner-magnetosphere with the Observations of Synchrotron Radiation from Jupiter

    Hiroaki Misawa, Akira Morioka

    Proceedings of 6th STEP Symposium　1996

  228. I

    H. Misawa, Y. Miyoshi, A. Morioka, T. Kondo, M. Kojima, Y. Koyama, J. Nakajima

    Proceedings of the 29th ISAS Lunar and Planetary Symposium　193　1996

  229. Observations of Volcanic Gases originated from Io

    H.Misawa, S.Takahashi, H.Nozawa, A.Morioka, S.Okano

    Proceedings of the 18th Solar System Science symposium　46　1996

  230. Velocity observations at high latitude and the acceleration phenomena Peer-reviewed

    M. Kojima, K. Asai, Y. Kozuka, H. Misawa, H. Watanabe, Y. Yamauchi

    Advances in Space Research　16　(9)　101-110　1995

    DOI： 10.1016/0273-1177(95)00320-E 　

    ISSN： 0273-1177

  231. Multi-station system for solar wind observations using the interplanetary scintillation method Peer-reviewed

    K Asai, Y Ishida, M Kojima, K Maruyama, H Misawa, N Yoshimi

    JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY　47　(11)　1107-1112　1995

    ISSN： 0022-1392

  232. THE SPECTRUM OF ELECTRON-DENSITY FLUCTUATIONS IN THE SOLAR-WIND AND ITS VARIATIONS WITH SOLAR-WIND SPEED Peer-reviewed

    PK MANOHARAN, M KOJIMA, H MISAWA

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　99　(A12)　23411-23420　1994/12

    ISSN： 0148-0227

  233. The spectrum of electron density fluctuations in the solar wind and its variations with solar wind speed Peer-reviewed

    P. K. Manoharan, M. Kojima, H. Misawa

    Journal of Geophysical Research: Space Physics　99　(12)　23411-23420　1994

    Publisher: Blackwell Publishing Ltd

    DOI： 10.1029/94JA01955 　

    ISSN： 2169-9402

  234. Polarization of Io-Related Jupiter's Decametric Radiations

    Hiroaki Misawa, Hiroshi Oya, Masahide Iizima

    Proceedings of Eighth International Symposium on Solar Terrestrial Physics　47　1994

  235. SOLAR-WIND OBSERVED WITHIN O.3 AU WITH INTERPLANETARY SCINTILLATION Peer-reviewed

    M KOJIMA, H WASHIMI, H MISAWA, K HAKAMADA

    SOLAR WIND SEVEN　3　201-204　1992

Show all ︎Show first 5

Misc. 72

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    小林秀行, 赤堀卓也, 河野裕介, 小山友明, 三澤浩昭, 土屋史紀, 岳藤一宏, 高橋慶太郎

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  2. かにパルサーの巨大電波パルス:X線との相関解析のためのデータベース概要

    寺澤敏夫, 寺澤敏夫, 榎戸輝揚, 木坂将大, HU Chin-Ping, HU Chin-Ping, 村田泰宏, 竹内央, 岳藤一宏, 岳藤一宏, 関戸衛, 米倉覚則, 三澤浩昭, 土屋史紀, 青木貴弘, 徳丸宗利, 本間希樹, 亀谷收, 小山友明, 浅野勝晃, 柴田晋平, 田中周太, ARZOUMANIAN Zaven, GENDREAU Keith C.

    日本天文学会年会講演予稿集　2021　2021

    ISSN： 1347-0639

  3. かにパルサーの巨大電波パルスに伴うX線超過の発見

    榎戸輝揚, 寺澤敏夫, 寺澤敏夫, 木坂将大, HU Chin-Ping, HU Chin-Ping, 村田泰宏, 竹内央, 岳藤一宏, 岳藤一宏, 関戸衛, 米倉覚則, 三澤浩昭, 土屋史紀, 青木貴弘, 徳丸宗利, 本間希樹, 亀谷收, 小山友明, 浅野勝晃, 柴田晋平, 田中周太, ARZOUMANIAN Zaven, GENDREAU Keith C.

    日本天文学会年会講演予稿集　2021　2021

    ISSN： 1347-0639

  4. かにパルサーの巨大電波パルスに伴うX線超過の理論モデル

    木坂将大, 榎戸輝揚, 寺澤敏夫, 寺澤敏夫, HU Chin-Ping, HU Chin-Ping, 村田泰宏, 竹内央, 岳藤一宏, 岳藤一宏, 関戸衛, 米倉覚則, 三澤浩昭, 土屋史紀, 青木貴弘, 徳丸宗利, 本間希樹, 亀谷收, 小山友明, 浅野勝晃, 柴田晋平, 田中周太, ARZOUMANIAN Zaven, GENDREAU Keith C.

    日本天文学会年会講演予稿集　2021　2021

    ISSN： 1347-0639

  5. 2017.11.7 Crab pulsar large glitch観測速報(2):波形変化の有無検証

    木坂将大, 榎戸輝揚, 寺澤敏夫, 徳丸宗利, 俵海人, 岳藤一宏, 関戸衛, 三澤浩昭, 土屋史紀, 村田泰宏, 竹内央, 米倉覚則, 青木貴弘, 新沼浩太郎, 藤澤健太, 本間希樹, 小山友明, 柴田晋平, 浅野勝晃, 田中周太

    日本天文学会年会講演予稿集　2018　245　2018/02/20

    ISSN： 1347-0639

  6. Arch Filament Systemの大気構造とその時間発展

    石川遼太郎, 上野悟, 一本潔, 三澤浩昭, 土屋史紀, 小原隆博

    日本天文学会年会講演予稿集　2018　83　2018/02/20

    ISSN： 1347-0639

  7. 2017.11.7 Crab pulsar large glitch観測速報(1):概要

    寺澤敏夫, 徳丸宗利, 俵海人, 岳藤一宏, 関戸衛, 三澤浩昭, 土屋史紀, 村田泰宏, 竹内央, 米倉覚則, 青木貴弘, 新沼浩太郎, 藤澤健太, 本間希樹, 小山友明, 榎戸輝揚, 木坂将大, 柴田晋平, 浅野勝晃, 田中周太

    日本天文学会年会講演予稿集　2018　245　2018/02/20

    ISSN： 1347-0639

  8. 太陽電波ゼブラパターンの準周期的変動とその起源

    金田和鷹, 三澤浩昭, 岩井一正, 増田智, 土屋史紀, 加藤雄人, 小原隆博

    日本地球惑星科学連合大会予稿集(Web)　2018　ROMBUNNO.PEM19‐P04 (WEB ONLY)　2018

  9. 太陽風シンチレーションによるCrabパルサー巨大電波パルス間の非ポアソン性の評価

    小林瑛史, 寺澤敏夫, 三澤浩昭, 土屋史紀, 北元, 関戸衛, 岳藤一宏, 竹内央, 徳丸宗利, 山崎了, 木坂将大, 三上諒, 廣島渚, 廣島渚

    日本天文学会年会講演予稿集　2017　2017

    ISSN： 1347-0639

  10. Fast Radio Burst(FRB)探索ソフトウェアの準備状況

    寺澤敏夫, 本間希樹, 木坂将大, 青木貴弘, 新沼浩太郎, 藤澤健太, 関戸衛, 岳藤一宏, 北元, 土屋史紀, 三澤浩昭, 竹内央

    日本天文学会年会講演予稿集　2017　2017

    ISSN： 1347-0639

  11. HISAKI衛星で観測された2015年イオ火山イベントにおけるイオトーラス中硫黄イオンのSystem IV周期の変動

    荒川崚, 三澤浩昭, 土屋史紀, 鍵谷将人, 吉川一朗, 吉岡和夫, 鈴木文晴, 木村智樹, 村上豪, 山崎敦

    地球電磁気・地球惑星圏学会総会及び講演会(Web)　142nd　ROMBUNNO.R009‐P22 (WEB ONLY)　2017

  12. みんなでふたたび木星へ, そして氷衛星へ その4 ～電波・プラズマ波動観測器RPWIの飛翔へ

    笠羽 康正, 三澤 浩昭, 土屋 史紀, 笠原 禎也, 井町 智彦, 木村 智樹, 加藤 雄人, 熊本 篤志, 小嶋 浩嗣, 八木谷 聡, 尾崎 光紀, 石坂 圭吾, 垰 千尋, 三好 由純, 阿部 琢美, Baptiste Cecconi, 諸岡 倫子, Jan-Erik Wahlund, JUICE-RPWI日本チーム

    日本惑星科学会誌「遊星人」　25　(3)　96-107　2016/09

    DOI： 10.14909/yuseijin.25.3_96 　

  13. Statistical study of the response of Jovian EUV aurora to the solar wind from Hisaki observations

    H. Kita, T. Kimura, C. Tao, F. Tsuchiya, H. Misawa, T. Sakanoi, Y. Kasaba, G. Murakami, K. Yoshioka, A. Yamazaki, I. Yoshikawa

    Proceedings of Symposium on Planetary Science 2016　SPS2016_37　2016/04/01

  14. The Radio and Plasma Wave Investigation (RPWI) for JUICE: Start of Engineering Model Development

    KASABA Yasumasa, MISAWA Hiroaki, TSUCHIYA Fuminori, KASAHARA Yoshiya, IMACHI Tomohiko, KIMURA Tomoki, KATOH Yuto, KUMAMOTO Atsushi, KOJIMA Hirotsugu, YAGITANI Satoshi, ISHISAKA Keigo, MIYOSHI Yoshizumi

    地球電磁気・地球惑星圏学会総会及び講演会(Web)　140th　2016

  15. カニパルサー巨大電波パルスのStacking解析

    三上諒, 寺澤敏夫, 浅野勝晃, 田中周太, 木坂将大, 三澤浩昭, 土屋史紀, 北元, 関戸衛, 岳藤一宏, 竹内央

    日本天文学会年会講演予稿集　2016　2016

    ISSN： 1347-0639

  16. イオプラズマトーラス発光非対称からの木星内部磁気圏における朝夕電場の評価

    荒川崚, 村上豪, 三澤浩昭, 土屋史紀, 北元

    日本地球惑星科学連合大会予稿集(Web)　2016　ROMBUNNO.PCG21‐P16 (WEB ONLY)　2016

  17. The Radio and Plasma Wave Investigation (RPWI) for JUICE: Contributions from Japan

    KASABA Yasumasa, MISAWA Hiroaki, TSUCHIYA Fuminori, KASAHARA Yoshiya, IMACHI Tomohiko, KIMURA Tomoki, KATOH Yuto, KUMAMOTO Atsushi, KOJIMA Hirotsugu, YAGITANI Satoshi, ISHISAKA Keigo, MIYOSHI Yoshizumi

    地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)　138th　2015

  18. Science objectives and implementation of Software-type Wave-Particle Interaction Analyzer (SWPIA) by RPWI for JUICE

    KATOH Yuto, KOJIMA Hirotsugu, ASAMURA Kazushi, KASABA Yasumasa, TSUCHIYA Fuminori, KASAHARA Yoshiya, IMACHI Tomohiko, MISAWA Hiroaki, KUMAMOTO Atsushi, YAGITANI Satoshi, ISHISAKA Keigo, KIMURA Tomoki, MIYOSHI Yoshizumi

    日本地球惑星科学連合大会予稿集(Web)　2015　2015

  19. The Radio & Plasma Wave Investigation (RPWI) for JUICE: Contribution plan from Japan

    KASABA Yasumasa, MISAWA Hiroaki, TSUCHIYA Fuminori, KASAHARA Yoshiya, IMACHI Tomohiko, KIMURA Tomoki, KATOH Yuto, KUMAMOTO Atsushi, KOJIMA Hirotsugu, YAGITANI Satoshi, ISHISAKA Keigo, MIYOSHI Yoshizumi

    日本地球惑星科学連合大会予稿集(Web)　2015　2015

  20. 多地点連携観測により得られたカニパルサー巨大電波パルスの広帯域スペクトル

    三上諒, 寺澤敏夫, 浅野勝晃, 田中周太, 木坂将大, 関戸衛, 岳藤一宏, 川合栄治, 竹内央, 三澤浩昭, 土屋史紀, 北元, 米倉覚則, 亀谷收, 本間希樹, 藤沢健太, 新沼浩太郎, 青木貴弘

    日本天文学会年会講演予稿集　2015　2015

    ISSN： 1347-0639

  21. CrabパルサーGRP間の相関:太陽風シンチレーション効果の可能性

    寺澤敏夫, 三澤浩昭, 土屋史紀, 北元, 関戸衛, 岳藤一宏, 竹内央, 徳丸宗利, 三上諒, 廣島渚, 浅野勝晃, 田中周太, 木坂将大

    日本天文学会年会講演予稿集　2015　2015

    ISSN： 1347-0639

  22. 325MHz帯におけるカニパルサーGRPのdispersion measureとdecay timeの時間変動

    廣島渚, 寺澤敏夫, 三上諒, 浅野勝晃, 田中周太, 木坂将大, 三澤浩昭, 土屋史紀, 北元, 関戸衛, 岳藤一宏, 竹内央

    日本天文学会年会講演予稿集　2015　2015

    ISSN： 1347-0639

  23. The Radio & Plasma Wave Investigation (RPWI) for JUICE: Contribution plan from Japan

    KASABA Yasumasa, MISAWA Hiroaki, TSUCHIYA Fuminori, KASAHARA Yoshiya, IMACHI Tomohiko, KIMURA Tomoki, KATOH Yuto, KUMAMOTO Atsushi, KOJIMA Hirotsugu, YAGITANI Satoshi, ISHISAKA Keigo, MIYOSHI Yoshizumi

    地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)　136th　2014

  24. 多地点連携によるカニパルサー電波高時間分解能観測

    三上諒, 寺澤敏夫, 浅野勝晃, 田中周太, 木坂将大, 関戸衛, 岳藤一宏, 竹内央, 小高裕和, 佐藤有, 佐藤有, 河合誠之, 田中康之, 寺田幸功, 小山志勇, 亀谷収, 本間希樹, 青木貴弘, 三澤浩昭, 土屋史紀, 北元

    日本天文学会年会講演予稿集　2014　2014

    ISSN： 1347-0639

  25. 電波干渉計及びひさき衛星を用いた木星放射線帯空間変動現象の考察

    北元, 土屋史紀, 村上豪, 三澤浩昭

    地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)　136th　ROMBUNNO.S001‐07　2014

  26. A letter of appreciation for the support to the students of the Planetary and Space Physics group, Department of Geophysics, Graduate School of Science, Tohoku University

    Tsuchiya F, Sato Y, Katoh Y, Nakagawa H, Kuroda T, Okano S, Ono T, Kasaba Y, Misawa H, Kumamoto A, Sakanoi T, Terada N, Murata I

    Planetary People　20　(3)　228-229　2011

    Publisher: The Japanese Society for Planetary Sciences

    ISSN： 0918-273X

  27. A numerical study of global water group neutral cloud distribution in Saturn's inner magnetosphere

    田所裕康, 三澤浩昭, 土屋史紀, 加藤雄人, 森岡昭, 米田瑞樹

    第１１回惑星圏研究会集録　113-116　2010/03

    Publisher: 東北大学理学研究科 惑星プラズマ・大気研究センター

  28. A numerical study of energetic ion distribution in Saturn's inner magnetosphere

    田所裕康, 三澤浩昭, 土屋史紀, 加藤雄人, 森岡昭

    第１１回惑星圏研究会集録　157-159　2010/03

    Publisher: 東北大学理学研究科 惑星プラズマ・大気研究センター

  29. Contribution of whistler-mode chorus to the loss of plasma sheet electrons: THEMIS observations

    KURITA Satoshi, MIYOSHI Yoshizumi, TSUCHIYA Fuminori, NISHIMURA Yukitoshi, HORI Tomoaki, MIYASHITA Yukinaga, TAKADA Taku, MORIOKA Akira, MISAWA Hiroaki

    地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)　128th　ROMBUNNO.B006-P013　2010

  30. Leaked emissions due to the In-house broadband powerline communications (2): Measurements by HF radio astronomy antennas

    Masatoshi Ohichi, Masahiro Kitagawa, Hiroaki Misawa, Fuminori Tsuchiya

    IEICE Technical Report　2010/01/01

  31. The radiation belt electron loss into the atmosphere: Initial analyses with LF radio observations at Ny-.ANGS.lesund

    TSUCHIYA FUMINORI, MISAWA HIROAKI, MORIOKA AKIRA, MIYOSHI YOSHIZUMI, SHIOKAWA KAZUO, KIKUCHI TAKASHI, OGAWA YASUNOBU

    極域科学・宙空圏・気水圏・生物・地学シンポジウム講演予稿集(CD-ROM)　2010　ROMBUNNO.PU03　2010

  32. Storm time loss of radiation belt electrons into the atmosphere: initial results from VLF/LF observation at Ny-Alesund

    TSUCHIYA FUMINORI, MISAWA HIROAKI, MORIOKA AKIRA, MIYOSHI YOSHIZUMI, SHIOKAWA KAZUO, KIKUCHI TAKASHI, OGAWA YASUNOBU

    地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)　128th　ROMBUNNO.B006-P019　2010

  33. Leaked Emissions due to the In-House Broadband Powerline Communications (1). Measurements of the Electric Field Strength at a Distance and Direct Measurements of the Common-Mode Current

    Masatoshi OHISHI, Masahiro KITAGAWA, Hiroaki MISAWA, Fuminori TSUCHIYA

    IEICE Technical Report　2009/08/12

  34. 土星内部磁気圏における中性粒子密度分布モデル

    田所裕康, 三澤浩昭, 土屋史紀, 加藤雄人, 森岡昭, 米田瑞樹

    第１０回惑星圏研究会集録　155-158　2009/03

    Publisher: 東北大学理学研究科 惑星プラズマ・大気研究センター

  35. 月低周波電波望遠鏡:LLFASTの観測システムとロードマップ

    岩田隆浩, 竹内央, 野田寛大, 浅利一善, 今井一雅, 成行泰裕, 三澤浩昭, 土屋史紀, 熊本篤志, 近藤哲朗, 中城智之, 河野宣之

    宇宙科学技術連合講演会講演集(CD-ROM)　53rd　2009

    ISSN： 1884-1945

  36. LLFAST計画:木星電波観測のための月-地球スペースVLBI

    岩田隆浩, 今井一雅, 野田寛大, 竹内央, 三澤浩昭, 土屋史紀, 熊本篤志, 近藤哲朗, 中城智之, 成行泰裕, 浅利一善, 河野宣之

    地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)　126th　2009

  37. LLFAST計画:サンプラーユニットの検討

    近藤哲朗, 岩田隆浩, 今井一雅, 野田寛大, 竹内央, 三澤浩昭, 土屋史紀, 熊本篤志, 中城智之, 成行泰裕, 浅利一善, 河野宣之

    地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)　126th　2009

  38. LLFAST計画:木星電波e-VLBI観測ネットワークとその将来計画

    今井一雅, 岩田隆浩, 近藤哲朗, 石井敦利, 三澤浩昭, 土屋史紀, 中城智之, 大野敏光, 今井雅文, 野田寛大, 竹内央, 熊本篤志, 成行泰裕, 河野宣之

    地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)　126th　2009

  39. Two-step evolution of auroral acceleration and pseudo-/full-substorms

    MORIOKA Akira, MIYOSHI Yoshizumi, TSUCHIYA Fuminori, MISAWA Hiroaki, KASABA Yasumasa, KATAOKA Ryuho, KADOKURA Akira, YUMOTO Kiyohumi, MATSUMOTO Hiroshi

    地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD−ROM)　126th　ROMBUNNO.B006-33　2009

  40. Development of Electric field and Plasma Wave Investigations for Future Space Missions : ERG、 SCOPE and beyond

    Yasumasa Kasaba, Atsushi Kumamoto, Takayuki Ono, Hiroaki Misawa, Hirotsugu Kojima, Yoshikatsu Ueda, Satoshi Yagitani, Yoshiya Kasahara, Keigo Ishisaka

    第9回宇宙科学シンポジウム・ P2-74　2009

  41. Statistical analysis of the inner edge of the electron plasma sheet based on THEMIS observations

    KURITA Satoshi, MISAWA Hiroaki, TSUCHIYA Fuminori, MORIOKA Akira, MIYOSHI Yoshizumi, NISHIMURA Yukitoshi, HORI Tomoaki, MIYASHITA Yukinaga, TAKADA Taku, ANGELOPOULOS Vassilis, MCFADDEN James P

    地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)　126th　ROMBUNNO.B006-P034　2009

  42. Leaked Emissions due to the In-House Broadband Powerline Communications (1) : Measurements of the Electric Field Strength at a Distance and Direct Measurements of the Common-Mode Current

    OHISHI Masatoshi, KITAGAWA Masahiro, MISAWA Hiroaki, TSUCHIYA Fuminori

    IEICE technical report　Vol. 109, No. 185, EMCJ2009-40, pp. 29-34　(185)　29-34　2009

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

    More details Close

    Measurements on the leaked electric field, when the in-house broadband power line communication (PLC) devices are in use, have so far been made with the separation distance not exceeding 10m. We measured the field strength farther than 10m, that has not been known, and found cases that the field strength exceeds the ambient noise by more than 20dB at the separation distance of 30m. We also made "direct" measurements on the common mode current (CMI) "on" the in-house power line, that has been regarded as the source of the leaked field, and found cases that the CMI exceeds the CMI limit for the Japanese PLC devices by more than 20dB.

  43. Loss processes in Saturn’s inner magnetosphere: Phase space density analysis

    田所裕康, 三澤浩昭, 土屋史紀, 加藤雄人, 森岡昭, 三好由純, 平木康隆, 米田瑞樹

    第９回惑星圏研究会集録　121-123　2008/03

    Publisher: 東北大学理学研究科 惑星プラズマ・大気研究センター

  44. 小型科学衛星シリーズ初号機の概要及び目指すサイエンス

    上野宗孝, 吉川一朗, 吉岡和夫, 寺田直樹, 笠羽康正, 土屋史紀, 鍵谷将人, 三澤浩昭, 高橋幸弘, 坂野井健, 山崎敦, 澤井秀次郎, 福田盛介, 坂井真一郎, 上水和典

    日本天文学会年会講演予稿集　2008　2008

    ISSN： 1347-0639

  45. Lunar Observatory in a future Lunar Mission

    花田英夫, 岩田隆浩, 佐々木晶, 河野宣之, 荒木博志, 野田寛大, 今井一雅, 三澤浩昭, 近藤哲朗

    宇宙科学技術連合講演会講演集(CD-ROM)　52nd　ROMBUNNO.3A11　2008

    ISSN： 1884-1945

  46. 小型衛星初号機搭載極端紫外分光器の開発の現状について

    吉川一朗, 上野宗孝, 笠羽康正, 山崎敦, 寺田直樹, 土屋史紀, 鍵谷将人, 三澤浩昭, 吉岡和夫, 村上豪

    地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)　124th　ROMBUNNO.B009-06　2008

  47. 小型宇宙望遠鏡TOPSによる惑星オーロラ・電磁圏観測の科学目標

    土屋史紀, 佐藤毅彦, 野澤宏大, 山崎敦, 笠羽康正, 寺田直樹, 垰千尋, 三澤浩昭, 鍵谷将人, 岡野章一, 森岡昭, 荻野竜樹, 深沢圭一郎, 今井一雅

    日本天文学会年会講演予稿集　2007　286　2007/08/20

    ISSN： 1347-0639

  48. Dual structure of auroral acceleration regions at substorm onsets as derived from auroral kilometric radiation spectra Peer-reviewed

    A. Morioka, Y. Miyoshi, F. Tsuchiya, H. Misawa, T. Sakanoi, K. Yumoto, R. R. Anderson, J. D. Menietti, E. F. Donovan

    JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS　112　(A6)　doi:10.1029/2006JA012186　2007/06

    DOI： 10.1029/2006JA012186 　

    ISSN： 2169-9380

  49. Electron flux enhancement in the low-altitude inner belt during storms （英文）

    田所裕康, 土屋史紀, 加藤雄人, 三好由純, 三澤浩昭, 森岡昭

    第８回惑星圏研究会集録　165-170　2007/03

    Publisher: 東北大学理学研究科 惑星プラズマ・大気研究センター

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    日本語主体の雑誌であるが本課題は英文で記述してある

  50. 小型宇宙望遠鏡TOPSによる水星・金星・火星流出大気観測の科学目標

    寺田直樹, 山崎敦, 三澤浩昭, 土屋史紀, 上野宗孝, 亀田真吾, 二穴喜文, 横田勝一郎, 渡部重十, 吉川一朗

    日本天文学会年会講演予稿集　2007　2007

    ISSN： 1347-0639

  51. Observation of electron pitch angle distribution in Saturn's inner magnetosphere

    Tadokoro Hiroyasu, Misawa Hiroaki, Tsuchiya Fuminori, Katoh Yuto, Morioka Akira, Miyoshi Yoshizumi

    Abstracts for fall meeting of the Japanese Society for Planetary Science　2007　(0)　142-142　2007

    Publisher: THE JAPANESE SOCIETY FOR PLANETARY SCIENCES

    DOI： 10.14909/jsps.2007f.0.142.0 　

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    The Magnetospheric Imaging Instrument (MIMI) onboard the Cassini spacecraft has observed energetic particles in Saturn&#039;s magnetosphere. In order to clarify energetic particle distribution, we have investigated pitch angle distributions of 20 keV – a few MeV electrons in the inner magnetosphere (&lt;15 Rs). In this presentation, we will discuss the effect of absorption by the E-ring and the possibility of wave-particle interactions based on the Radio and Plasma Wave Science (RPWS) data.

  52. 小型宇宙望遠鏡TOPSによる惑星電磁圏領域の科学目標

    土屋史紀, 寺田直樹, 山崎敦, 今井一雅, 深沢圭一郎, 二穴喜文, 鍵谷将人, 亀田真吾, 笠羽康正, 三澤浩昭, 森岡昭, 野澤宏大, 荻野竜樹, 佐藤毅彦, 垰千尋, 上野宗孝, 横田勝一郎, 吉川一朗, 渡部重十, 高橋幸弘

    地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)　122nd　ROMBUNNO.B009-P028　2007

  53. Electron flux enhancement in the inner radiation belt during moderate magnetic storms Peer-reviewed

    H. Tadokoro, F. Tsuchiya, Y. Miyoshi, H. Misawa, A. Morioka, D. S. Evans

    ANNALES GEOPHYSICAE　25　(6)　1359-1364　2007

    ISSN： 0992-7689

    eISSN： 1432-0576

  54. Plasma distribution around the Titan orbit

    Kawaragi, K.・A. Morioka, H. Misawa, F. Tsuchiya

    Proceedings of the 39th ISAS Lunar and Planetary Symposium　2006

  55. 小オービタによる木星電磁圏観測:科学目標

    笠羽 康正, 高島 健, 三澤 浩昭

    宇宙科学シンポジウム　5　129-132　2005/01/06

    Publisher: 宇宙科学研究所

  56. 25pXA-1 Small Jovian Orbiter: Scientific Objectives

    Kasaba Y, Takashima T, Misawa H, Tsuchiya F, Yamazaki A, Jovian Small, Orbiter Team

    Meeting Abstracts of the Physical Society of Japan　60　(0)　217-217　2005

    Publisher: The Physical Society of Japan

    ISSN： 1342-8349

  57. The response of the Jovian synchrotron radiation at 325 MHz associated with the strong solar activity during October to November 2003

    Tsuchiya, F, H. Misawa, T. Watanabe, S. Nomura, K, Imai, A. Morioka, Y. Miyoshi, T. Kondo

    Proceedings of the 37th Lunar and Planetary Symposium　167-170　2005

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    筆頭

  58. Analysis of Short Term Variation of Jovian Synchrotron Radiation at a Frequency of 327 MHz

    S. Nomura, H. Misawa, F. Tsuchiya, A. Morioka

    Proceedings of the 37th Lunar and Planetary Symposium　151-154　2005

  59. Search for lunar radio emissions caused by meteoroid impacts: Radio observation at 325MHz during the Perseids in Aug. 2004

    Tsuchiya, F, H. Misawa, A. Berezhnoy

    Proc. of the 38th ISAS Lunar and Planet. Symp.　208-211　2005

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    筆頭

  60. 月裏側での低周波電波観測の提案

    野田寛大, 河野宣之, 井上允, 河野裕介, 小野高幸, 土屋史紀, 三沢浩昭, 森岡昭, 近藤哲朗, 竹内央, 岩田隆浩, 松本甲太郎, 小島正宜, 徳丸宗利

    日本惑星科学会秋季講演会予稿集　2004　2004

  61. 小型木星極軌道オービタを使った木星電磁圏探査

    笠羽康正, 高島健, 三沢浩昭, 土屋史紀, 森岡昭, 関華奈子, 平原聖文, 津田雄一, 森治

    太陽系科学シンポジウム　25th　2004

  62. First light of Jovian synchrotron radiation with the Iitate Planetary Radio Telescope

    Tsuchiya, F, H. Misawa, R. Kudo, Y. Miyoshi, T. Watanabe, A. Morioka, T. Kondo

    Proceedings of the 36th Lunar and Planetary Symposium　2003

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    筆頭

  63. Interference Measurements in HF and UHF Bands Caused by Extension of Power Line Communication Bandwidth for Astronomical purpose

    F. Tsuchiya, H. Misawa, T. Nakajo, I. Tomizawa, J. Nakajima, M. Ohishi, M. Tokumaru, T. Ono, A. Morioka

    Proceedings of 7th International Symposium on Power-Line Communications　2003

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    筆頭

  64. Measurements of harmful interferences in the HF-UHF bands caused by extension of Power Line Communication bandwidth

    F. Tsuchiya, H. Misawa, T. Nakajo, I. Tomizawa, J. Nakajima, M. Ohishi, T. Ono

    IVS CRL technology development center news　21　12-15　2002/11

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    筆頭

  65. Performance test of newly developed radio telescope and receivers at the Iitate Observatory

    F. Tsuchiya, H. Misawa, Y. Miyoshi, T. Watanabe, R. Kudo, A. Morioka, T. Kondo

    Proceedings of the 35th Lunar and Planetary Symposium　211-214　2002

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    筆頭

  66. 木星シンクロトロン放射強度短期時間変動の観測 (鹿島宇宙電波観測用大型アンテナによる研究成果特集) -- (電波科学観測成果)

    三好 由純, 三澤 浩昭, 森岡 昭

    通信総合研究所季報　47　(1)　169-177　2001/03

    Publisher: 電気通信振興会

    ISSN： 0914-9279

  67. Development of observation system for the Jovian synchrotron radiation at 327 MHz Peer-reviewed

    Watanabe, T, H. Misawa, F. Tsuchiya, Y. Miyoshi, Y. Fukuda, T. Abe, A. Morioka

    Tohoku Geophys. Journ.　36　(1)　25-37-37　2001

    Publisher: Faculty of Science, Tohoku University

    ISSN： 0040-8794

  68. Simultaneous observation between electron precipitation by DMSP satellite and pulsating aurora at Syowa Station in Antarctica.

    TAKIZAWA HIROKAZU, MORIOKA AKIRA, MISAWA HIROAKI, SATO NATSUO, MIYAOKA HIROSHI

    地球惑星科学関連学会合同大会予稿集　1998　157　1998/05

  69. Auroral LF Waves and pulsating aurora.

    TAKIZAWA HIROKAZU, MORIOKA AKIRA, MISAWA HIROAKI, TAKAHASHI YUKIHIRO, MIYAOKA HIROSHI, SATO NATSUO

    地球惑星科学関連学会合同大会予稿集　1997　421　1997/03

  70. Calibration of Gain and Phase on the Phased Array System Installed in a Radio Telescope

    ASAI Kikuo, KOJIMA Masayoshi, ISHIDA Yoshio, MARUYAMA Kazuo, YOSHIMI Naohiko, MISAWA Hiroaki, MIYASATO Kazuhide

    The Transactions of the Institute of Electronics,Information and Communication Engineers. B-(0xF9C2)　79　(12)　994-1002　1996/12/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0915-1885

  71. Calibration of Phased Array System

    Asai K, Kojima M, Ishida Y, Maruyama K, Yoshimi N, Misawa H, Miyasato K

    Proceedings of the IEICE General Conference　1996　(1)　95-95　1996/03/11

    Publisher: The Institute of Electronics, Information and Communication Engineers

  72. Jovian Electron Release and The Solar Wind

    F. Tsuchiya, A. Morioka, H. Misawa

    Proceedings of the 29th ISAS Lunar and Planetary Symposium　1996

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    筆頭

Show all ︎Show first 5

Books and Other Publications 2

  1. Polarization of Jovian Decametric Radiation

    H. Misawa

    1997

  2. Dependence of Velocity Fluctuations on Solar Wind Speeds from an IPS analysis method

    Hiroaki Misawa, Masayoshi Kojima

    1996

Presentations 315

  1. メートル波帯太陽・惑星電波観測用広帯域フィードシステムの開発-IV

    桑山陽次, 三澤浩昭, 土屋史紀, 北元, 氏原秀樹

    日本天文学会2025年春季年会　2025/03/19

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    本学修士学生

  2. 広帯域アンテナの開発(V)

    氏原秀樹, 野坂秀之, 桑山陽次, 三澤浩昭, 北 元, 土屋史紀, 三谷友彦

    電子情報通信学会・無線電力伝送研究会 (WPT)　2025/03/11

  3. Long term variations of Jupiter‘s auroral radio emission -II

    Hiroaki Misawa, Fuminori Tsuchiya

    Symposium on Planetary Sciences 2025　2025/03/03

  4. Ionosphere, rare atmosphere and radar survey of Jupiter's icy moons Invited

    Symposium on Planetary Sciences 2025　2025/03/05

  5. Campaign observations of Jupiter's radiation belts by radio telescopes and JUNO

    Symposium on Planetary Sciences 2025　2025/03/03

  6. Analysis of the spatial structure of Jupiter's radiation belt electrons using the large radio interferometer GMRT: Simultaneous Observation Campaign with JUNO

    Symposium on Planetary Sciences 2025　2025/03/03

  7. 東北大太陽電波観測系機関報告

    三澤浩昭, 土屋史紀, 桑山陽次, 佐藤愼也

    2024年度太陽研究者連絡会シンポジウム　2025/02/18

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    本人

  8. 東北⼤低周波電波観測：現況と近未来

    三澤浩昭, 土屋史紀, 北元, 桑山陽次, 和賀正道

    宇宙電波懇談会シンポジウム2025　2025/01/08

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    本人

  9. 東北大学機関報告：低周波VLBI観測に向けた準備状況

    三澤浩昭, 土屋史紀, 北元, 桑山陽次, 和賀正道

    VLBI懇談会シンポジウム2024　2024/12/09

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    本人

  10. メートル波広帯域フィードの開発

    桑山陽次, 三澤浩昭, 土屋史紀, 北元, 氏原秀樹

    VLBI懇談会シンポジウム2024　2024/12/09

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    本学修士学生

  11. 低周波 VLBI 観測のためのデータフォーマット変換に関する研究

    藤田和真, 藤澤健太, 新沼浩太郎, 小林秀行, 三澤浩昭, 小山友明, 寺家隆明, 藏原昂平, 鈴木駿策, 吉浦伸太郎, 岳藤一宏

    VLBI懇談会シンポジウム2024　2024/12/09

  12. Long-term variable nature of Jupiter’s auroral radio emissions - II

    Hiroaki Misawa, Fuminori Tsuchiya

    2024/11/26

  13. High-Frequency part of the Radio & Plasma Wave Investigation (RPWI) aboard JUICE: Lunar-Earth flyby in Aug 2024 and beyond

    Yasumasa Kasaba, Cecconi Baptiste, Fuminori Tsuchiya, Hiroaki Misawa, Hajime Kita, Rikuto Yasuda, Yuto Katoh, Atsushi Kumamoto, Tomoki Kimura, Yoshizumi Miyoshi, Yoshiya Kasahara, Shoya Matsuda, Satoshi Yagitani, Mitsunori Ozaki, Hirotsugu Kojima, Satoshi Kurita, Wahlund J.-E.

    2024/11/24

  14. Development of a wideband feed system for the solar and planetary radio telescope in Tohoku University

    Yoji Kuwayama, Hiroaki Misawa, Fuminori Tsuchiya, Hajime Kita, Hideki Ujihara

    2024/11/25

  15. メートル波帯太陽・惑星電波観測用広帯域フィードシステムの開発-III

    桑山陽次, 三澤浩昭, 土屋史紀, 北 元, 氏原秀樹

    日本天文学会2024年秋季年会　2024/09/11

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    本学修士学生

  16. Lunar Subsurface Exploration Using Passive Radar based on AKR observations by KAGUYA/LRS

    Emi Tanaka, Fuminori Tsuchiya, Atsushi Kumamoto, Yasumasa Kasaba, Hiroaki Misawa, Rikuto Yasuda

    Japan Geoscience Union Meeting 2024　2024/05/27

  17. Solar wind response of dawn-dusk asymmetry in Io plasma torus with the Haleakala T60 and HISAKI satellite observations

    Hiroyasu Kondo, Fuminori Tsuchiya, Masato Kagitani, Shinnosuke Satoh, Hiroaki Misawa, Go Murakami, Yuki Nakamura, Tomoki Kimura, Atsushi Yamazaki, Ichiro Yoshikawa, Hajime Kita

    Japan Geoscience Union Meeting 2024　2024/05/28

  18. 3D occultation modeling of Jovian auroral radio waves to uncover the ionospheric formation process of icy moons

    Rikuto Yasuda, Tomoki Kimura, Baptiste Cecconi, Hiroaki Misawa, Fuminori Tsuchiya, Yasumasa Kasaba, Corentin Louis, Shotaro Sakai, Shinnosuke Satoh

    Japan Geoscience Union Meeting 2024　2024/05/28

  19. High-Frequency part of the Radio & Plasma Wave Investigation (RPWI) aboard JUICE: toward the Lunar-Earth flyby in Aug 2024

    Yasumasa Kasaba, Baptiste Cecconi, Fuminori Tsuchiya, Hiroaki Misawa, Hajime Kita, Rikuto Yasuda, Yuto Katoh, Atsushi Kumamoto, Tomoki Kimura, Yoshizumi Miyoshi, Yoshiya Kasahara, Shoya Matsuda, Satoshi Yagitani, Mitsunori Ozaki, Hirotsugu Kojima, Satoshi Kurita, Jan-Erik Wahlund, JUICE RPWI team

    Japan Geoscience Union Meeting 2024　2024/05/28

  20. Characteristics of spectral fine structures of metric type II radio bursts

    Hiroaki Misawa, Fuminori Tsuchiya, Yozi Kuwayama

    Japan Geoscience Union Meeting 2024　2024/05/29

  21. Development of a wideband feed system for the solar and planetary radio telescope in Tohoku University

    Japan Geoscience Union Meeting 2024　2024/05/29

  22. メートル波帯太陽・惑星電波観測用広帯域フィードシステムの開発-II

    桑山陽次, 三澤浩昭, 土屋史紀, 北元, 氏原秀樹

    日本天文学会2024年春季年会　2024/03/15

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    本学修士学生

  23. TREED: 21cm 線グローバルシグナル観測に向けた検討・開発状況

    吉浦伸太郎, 河野裕介, 藏原昂平, 大木愛花, 高橋智, 岡松郁弥, 中西裕之, 三澤浩昭, 北元

    日本天文学会2024年春季年会　2024/03/14

  24. 低周波数太陽電波バースト観測研究の動向 Invited

    三澤浩昭

    太陽圏宇宙線プラズマ合同研究シンポジウム　2024/03/06

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    本人

  25. TREED project:宇宙暗黒時代以後の21cm線グローバルシグナル観測

    吉浦伸太郎, 高橋 智, 岡松郁弥, 河野裕介, 藏原昂平, 大木愛花, 中西裕之, 三澤浩昭, 北 元

    宇宙電波懇談会シンポジウム 2024　2024/03/04

  26. 東北⼤低周波電波観測：その取組と今後

    三澤浩昭, 土屋史紀, 北 元, 桑山陽次

    宇宙電波懇談会シンポジウム 2024　2024/03/04

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    本人

  27. 東北大太陽電波観測系機関報告

    三澤浩昭, 土屋史紀, 桑山陽次

    2023年度太陽研究者連絡会シンポジウム　2024/02/20

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    本人

  28. 低周波(系外)惑星電波観測に向けた準備状況

    三澤浩昭, 土屋史紀, 北元, 桑山陽次, 小林秀行

    第25回惑星圏研究会　2024/02/20

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    本人

  29. 太陽・惑星電波観測用広帯域フィードシステムの開発

    桑山陽次, 三澤浩昭, 土屋史紀, 北元, 氏原秀樹

    第25回惑星圏研究会　2024/02/20

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    本学修士学生

  30. 飯舘・蔵王観測所を用いた低周波VLBI実験

    北元, 三澤浩昭, 土屋史紀, 近藤哲朗, 岳藤一宏

    第25回惑星圏研究会　2024/02/20

  31. 東北大学HF帯電波観測所における木星・銀河・太陽電波観測の現況

    熊本篤志, 加藤雄人, 土屋史紀, 三澤浩昭, 蓮田亮大, 西原智昭, 石田裕昭, 山川竜太, 千葉翔太, 大家寛

    第25回惑星圏研究会　2024/03/20

  32. Solar wind response of dawn-dusk asymmetry in Io plasma torus with the Haleakala T60 and HISAKI satellite observations

    Symposium on Planetary Sciences 2024　2024/02/20

  33. メートル波太陽‧惑星電 波観測用広帯域フィードシステムの開発

    桑山陽次, 三澤浩昭, 土屋史紀, 北 元, 氏原秀樹

    2023年度 VLBI懇談会シンポジウム　2023/12/13

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    本学修士学生

  34. GMRTによる連星矮星2MJ0746+20 観測計画

    土屋史紀, 三澤浩昭, 北元, 安田陸人, 桑山陽次, 木村智樹, 藤井友香, 小林秀行

    2023年度 VLBI懇談会シンポジウム　2023/12/13

  35. TREED project: 21cm線グローバルシグナル検出に向けた 開発の計画と状況

    吉浦 伸太郎, 高橋 智, 岡松 郁弥, 河野 裕介, 藏原 昂平, 大木 愛花, 中西 裕之, 三澤 浩昭, 北 元

    2023年度 VLBI懇談会シンポジウム　2023/12/15

  36. 東北大機関報告: 低周波電波観測の現況

    三澤浩昭, 土屋史紀, 北 元, 桑山陽次, 熊本篤志

    2023年度 VLBI懇談会シンポジウム　2023/12/13

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    本人

  37. New open database of high-resolution solar radio bursts observed by the spectropolarimeter AMATERAS

    Hiroaki Misawa, Fuminori Tsuchiya, Takahiro Obara, Kazumasa Iwai, Yoji Kuwaya

    2023/09/26

  38. Method to explore the lunar surface and subsurface structure by passive radar using AKR observed by Kaguya/LRS

    Emi Tanaka, Fuminori Tsuchiya, Atsushi Kumamoto, Yasumasa Kasab, Hiroaki Misaw, Rikuto Yasud, Hajime Kita

    2023/09/25

  39. Low-frequency VLBI observation with Iitate and Zao observatories

    Hajime Ki, Hiroaki Misaw, Fuminori Tsuchiya, Tetsuro Kondo, Kazuhiro Takefuji

    2023/09/25

  40. Radio & Plasma Wave Investigation (RPWI) aboard JUICE: The first half year of the long travel to Jupiter and Icy Moons

    Yasumasa Kasaba, Fuminori Tsuchiya, Hiroaki Misaw, Yuto Katoh, Hajime Ki, Tomoki Kimura, Atsushi Kumamoto, Rikuto Yasuda, Shinnosuke Satoh, Shotaro Sakai, Yoshizumi Miyoshi, Yoshiya Kasahara, Shoya Matsuda, Satoshi Yagitani, Mitsunori Ozaki, Hirotsugu Kojim, Satoshi Kuri, Cecconi Baptiste, Wahlund JanErik, JUICE RPWI tea

    2023/09/26

  41. Feasibility study of ionospheric explorations at Jupiter's icy moons using Faraday rotation effect

    Rikuto Yasud, Tomoki Kimura, Hiroaki Misaw, Fuminori Tsuchiya, Shinnosuke Satoh, Yasumasa Kasaba, Shotaro Sakai, Atsushi Kumamo

    2023/09/26

  42. 低周波数電波観測による太陽～恒星・惑星科学

    三澤浩昭, 土屋史紀, 熊本篤志, 北 元, 小林秀行, 寺澤敏夫, 岳藤一宏, 木坂将大

    日本天文学会2023年秋季年会　2023/09/22

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    本人

  43. メートル波帯太陽・惑星電波観測用広帯域フィードシステムの開発

    桑山陽次, 三澤浩昭, 土屋史紀, 北元, 氏原秀樹

    日本天文学会2023年秋季年会　2023/09/21

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    本学修士学生

  44. 低周波数高感度電波観測による惑星科学研究：SKAへの期待 Invited

    三澤浩昭

    SKA-Japanウェビナーシリーズ　2023/07/04

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    本人

  45. Polarization characteristics of Jupiter's hectometric radio emission International-presentation

    Hiroaki Misawa, Fuminori Tsuchiya, Atsushi Kumamoto, Rikuto Yasuda, Yoshiya Kasahara, Yoshizumi Miyoshi, Satoko Nakamura

    Japan Geoscience Union Meeting 2023　2023/05/25

  46. Numerical simulation of passive radar for ionospheric explorations at Jupiter's icy moons International-presentation

    Rikuto Yasuda, Tomoki Kimura, Hiroaki Misawa, Fuminori Tsuchiya, Shinnosuke Satoh, Yasumasa Kasaba, Shotaro Sakai, Atsushi Kumamoto, Baptiste Cecconi, Corentin Louis, Philippe Zarka

    Japan Geoscience Union Meeting 2023　2023/05/25

  47. Localized hot electron injection on the dusk side during transient brightening in Io plasma torus observed by Hisaki

    Kento Furukawa, Fuminori Tsuchiya, Masato Kagitani, Kazuo Yoshioka, Ichiro Yoshikawa, Tomoki Kimura, Hajime Kita, Go Murakami, Atsushi Yamazaki, Hiroaki Misawa, Yasumasa Kasaba, Masafumi Imai

    Japan Geoscience Union Meeting 2023　2023/05/25

  48. Radio & Plasma Wave Investigation (RPWI) aboard JUICE: Post launch status and its expected sciences for Jupiter and Icy Moons

    Yasumasa Kasaba, Fuminori Tsuchiya, Hiroaki Misawa, Atsushi Kumamoto, Yuto Katoh, Hajime Kita, Tomoki Kimura, Rikuto Yasuda, Shinnosuke Satoh, Shotaro Sakai, Yoshizumi Miyoshi, Masahiro Kitahara, Yoshiya Kasahara, Shoya Matsuda, Satoshi Yagitani, Mitsunori Ozaki, Hirotsugu Kojima, Satoshi Kurita, Baptiste Cecconi, Jan-Erik Wahlund, RPWI team, JUICE

    Japan Geoscience Union Meeting 2023　2023/05/25

  49. 惑星科学「低周波数高感度観測による惑星科学研究：SKAへの期待」 Invited

    三澤浩昭, 熊本篤志, 土屋史紀, 北 元, 佐川英夫, 安田陸人

    SKA Japanワークショップ2022　2023/03/08

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    本人

  50. 東北大太陽電波望遠鏡の運用状況

    三澤浩昭, 土屋史紀, 小原隆博

    太陽研連シンポジウム2022　2023/02/21

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    本人

  51. 東北⼤機関報告：低周波電波観測の現況

    三澤浩昭, ⼟屋史紀, 熊本篤志, 北 元, 笠⽻康正

    VLBI懇談会シンポジウム2022　2022/12/23

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    本人

  52. Numerical radar simulation for the explorations of the ionospheres of Jupiter's icy moons

    Rikuto Yasuda, Tomoki Kimura, Hiroaki Misawa, Fuminori Tsuchiya, Shinnosuke Satoh, Shotaro Sakai, Atsushi Kumamoto, Yasumasa Kasaba, Baptiste Cecconi, Corentin Louis, Philippe Zarka

    The 152 th SGEPSS General Assembly　2022/11/06

  53. Localized hot electron inflow on the dusk side during transient brightening in Io plasma torus observed by Hisaki/EXCEED

    Kento Furukawa, Fuminori Tsuchiya, Masato Kagitani, Kazuo Yoshioka, Ichiro Yoshikawa, Tomoki Kimura, Hajime Kita, Go Murakami, Atsushi Yamazaki, Hiroaki Misawa, Yasumasa Kasaba

    The 152 th SGEPSS General Assembly　2022/11/07

  54. Mercury Flybys of BepiColombo/Mio PWI and Prelaunch of JUICE RPWI: Collaborations with Europe

    Yasumasa Kasaba, Hirotsugu Kojima, Satoshi Kurita, Satoshi Yagitani, Mitsunori Ozaki, Yoshiya Kasahara, Shoya Matsuda, Fuminori Tsuchiya, Hiroaki Misawa, Atsushi Kumamoto, Tomoki Kimura, Hajime Kita, Masahiro Kitahara, Shotaro Sakai, Rikuto Yasuda, Yoshizumi Miyoshi, PWI Team, BepiColombo Mio, RPWI Team JUICE

    The 152 th SGEPSS General Assembly　2022/11/06

  55. Method to explore the lunar subsurface structure by passive radar using auroral kilometric radiation with Kaguya/LRS

    The 152 th SGEPSS General Assembly　2022/11/05

  56. Causalities of occurrence features of Io-related Jupiter's radio emission : Examination of non-uniform energy supply from Io

    Hiroaki Misawa, Atsushi Kumamoto, Rikuto Yasuda

    The 152 th SGEPSS General Assembly　2022/11/05

  57. Numerical radar simulation for the explorations of the ionospheres of Jupiter’s icy moons

    Rikuto Yasuda, Tomoki Kimura, Hiroaki Misawa, Fuminori Tsuchiya, Atsushi Kumamoto, Yasumasa Kasaba

    Planetary, Solar, Radio and Heliospheric Radio Emissions (PRE) IX Conference　2022/09/26

  58. Reconsideration for causalities of occurrence features of Jupiter's Io-related radio emission

    Hiroaki Misawa, Atsushi Kumamoto, Rikuto Yasuda

    Planetary, Solar, Radio and Heliospheric Radio Emissions (PRE) IX Conference　2022/09/26

  59. Numerical radar simulation for the explorations of the ionosphere at Jupiter’s icy moons

    Rikuto Yasuda, Tomoki Kimura, Hiroaki Misawa, Fuminori Tsuchiya, Atsushi Kumamoto, Yasumasa Kasaba

    Magnetospheres of the Outer Planets Meeting 2022　2022/07/14

  60. Localized hot electron inflow on the dusk side during transient brightening in Io plasma torus observed by Hisaki/EXCEED

    Kento Furukawa, Fuminori Tsuchiya, Masato Kagitani, Kazuo Yoshioka, Ichiro Yoshikawa, Tomoki Kimura, Hajime Kita, Go Murakami, Atsushi Yamazaki, Hiroaki Misawa, Yasumasa Kasaba

    Magnetospheres of the Outer Planets Meeting 2022　2022/07/12

  61. - Reconsideration for causalities of occurrence features of Io-related Jupiter’s radio emission

    Hiroaki Misawa, Atsushi Kumamoto, Rikuto Yasuda

    Magnetospheres of the Outer Planets Meeting 2022　2022/07/12

  62. Temporal and spatial variation of the source region of IPDP type-EMIC waves: Case study on 19 April 2017

    Japan Geoscience Union Meeting 2022　2022/06/01

  63. Dependence of frequency drift rates on solar activity cycle for ordinary and micro type III bursts

    Japan Geoscience Union Meeting 2022　2022/05/30

  64. Localized hot electron inflow on the dusk side during transient brightening in Io plasma torus observed by Hisaki/EXCEED

    Kento Furukawa, Fuminori Tsuchiya, Masato Kagitani, Kazuo Yoshioka, Ichiro Yoshikawa, Tomiki Kimura, Hajime Kita, Go Murakami, Astushi Yamazaki, Hiroaki Misawa, Yasumasa Kasaba

    Japan Geoscience Union Meeting 2022　2022/05/26

  65. Reconsideration for causalities of occurrence features of Jupiter's Io-related radio emission

    Hiroaki Misawa, Atsushi Kumamoto, Rikuto Yasuda

    Japan Geoscience Union Meeting 2022　2022/05/26

  66. Numerical radar simulation for the explorations of the ionosphere at Jupiter's icy moons

    Rikuto Yasuda, Tomoki Kimura, Hiroaki Misawa, Fuminori Tsuchiya, Atsushi Kumamoto, Yasumasa Kasaba

    Japan Geoscience Union Meeting 2022　2022/05/26

  67. Radio & Plasma Wave Investigation (RPWI) aboard JUICE: Sciences and their feasibilities for Jupiter and Icy Moons

    Yasumasa Kasaba, Fuminori, Tsuchiya, Hiroaki Misawa

    Japan Geoscience Union Meeting 2022　2022/05/26

  68. Ordinary type III burstとMicro type III burstの出現様相の太陽活動依存性

    関 佑一朗, 三澤浩昭, 土屋史紀, 小原隆博, 森岡 昭, 増田 智, 岩井一正, 藤木謙一

    2021年度太陽研連シンポジウム　2022/02/14

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    本学修士学生

  69. 東北大太陽電波望遠鏡の運用状況

    三澤浩昭, 土屋史紀, 小原隆博, 関佑一朗, 寺岡耕平

    2021年度太陽研連シンポジウム　2022/02/14

  70. Reconsideration for causalities of occurrence features of Io-related Jupiter's radio emission

    2022/02/08

  71. Numerical radar simulation for the explorations of the ionosphere at Jupiter's icy moons

    2022/02/08

  72. The mechanism of frequency increase of IPDP type EMIC waves: event analysis of ground and satellite observations on 19 April 2017

    A. Hirai, F. Tsuchiya, T. Obara, Y. Kasaba, Y. Katoh, H. Misawa, K. Shiokawa, Y. Miyoshi, C.-W. Jun, S. Kurita, M. Connors, A. Hendry

    American Geophysical Union 2021 Fall meeting　2021/12

  73. 東北⼤機関報告： 低周波電波観測の現在と近未来

    三澤浩昭, 土屋史紀, 熊本篤志, 笠羽康正, 北元

    2021年度VLBI懇談会シンポジウム　2021/12/02

  74. 太陽活動第23-24周期でのOrdinary type III burstとMicro type III burstの出現特性の太陽活動依存性

    関 佑一朗, 三澤 浩昭, 小原 隆博, 土屋 史紀, 増田 智, 岩井 一正, 森岡 昭

    地球電磁気・地球惑星圏学会 第150回講演会　2021/11/02

  75. 地上-衛星観測によるIPDPタ イプEMIC波動の周波数上昇に関するイベント解析

    平井 あすか, 土屋 史紀, 小原 隆博, 笠羽 康正, 加藤 雄人, 三澤 浩昭, 塩川 和夫, 三好 由純, 田 采祐, 栗田 怜, Connors Martin, Hendry Aaron

    地球電磁気・地球惑星圏学会 第150回講演会　2021/11/02

  76. Radio & Plasma Wave Investigation (RPWI) aboard JUICE: 木星および氷衛星への科学目標およびその実現性

    笠羽 康正, 三澤 浩昭, 土屋 史紀, 熊本 篤志, 木村 智樹, 北 元, 安田 陸人, 加藤 雄人, 三好 由純, 笠原 禎也, 八木谷 聡, 小嶋 浩嗣, Cecconi B, Wahlund Jan-Erik

    地球電磁気・地球惑星圏学会 第150回講演会　2021/11/01

  77. Numerical radar simulation for the explorations of the ionosphere at Jupiter's icy moons

    2021/11/01

  78. 東北大の低周波電波・可視赤外望遠鏡：その取り組みと 今後

    三澤浩昭, 土屋史紀, 熊本篤志, 笠羽康正, 坂野井 健, 鍵谷将人

    研究会「大学運用型望遠鏡による天文学の成果と今後」　2021/10/28

  79. Current status and future plan of the HF-UHF ground-based radio observation systems of Tohoku University for solar and extra-solar system explorations

    H. Misawa, A. Kumamoto, F. Tsuchiya, Y. Kasaba, H. Kita, H. Kobayashi, T. Terasawa, T. Enoto, K. Takefuji, Y. Kubo

    Magnetospheres of the Outer Planets Meeting　2021/07

  80. Numerical simulation of the passive subsurface radar for Jupiter’s icy moons

    Tomoki Kimura, Rikuto Yasuda, Fuminori Tsuchiya, Atsushi Kumamoto, Hiroaki Misawa, Yasumasa Kasaba

    Magnetospheres of the Outer Planets Meeting　2021/07

  81. Io plasma torus and Jovian aurora activities seen by Hisaki and future icy moon UV observation platform

    F. Tsuchiya, G. Murakami, A. Yamazaki, K. Yoshioka, T. Kimura, C. Tao, R. Koga, H. Kita, M. Kuwabara, K. Masunaga, S. Sakai, M. Kagitani, R. Hikida, T. Sakanoi, H. Misawa, Y. Kasaba, I. Yoshikawa, the Hisaki science team, the LAPYUTA, working team

    Magnetospheres of the Outer Planets Meeting　2021/07/12

  82. 太陽電波で探る太陽高エネルギー粒子現象 Invited

    三澤浩昭

    Space-Sun-Earthランチセミナー　2021/06/15

  83. Performance, Operation and their Feasibilities for Jupiter and Icy Moons: High Frequency Receiver of Radio & Plasma Wave Investigation (RPWI) aboard JUICE during the Flight Model Test campaign

    2021/06/04

  84. Properties of EMIC waves observed by Van Allen Probes and ground-based magnetometers during relativistic electron precipitation

    2021/06/05

  85. Closure of the Onagawa Magnetic Field Observatory of Tohoku University

    2021/06/06

  86. Numerical radar simulation for the explorations of the ionosphere and plume at Jupiter's icy moons

    2021/06/04

  87. Numerical simulation of the passive subsurface radar for Jupiter's icy moons

    2021/06/04

  88. Expected source regions of Jupiter’s hectometric radio components viewed from their polarization characteristics

    2021/06/04

  89. 太陽高エネルギー電子短期増大現象時のⅢ型電波バーストと電子エネルギーの関連性

    藤本 達也, 三澤 浩昭, 土屋 史紀, 小原 隆博

    日本地球惑星科学連合2021年大会　2021/06/05

  90. Electron acceleration region in a small solar flare observed with Nobeyama Radioheliograph and MUSER

    2021/06/06

  91. Occurrence dependence on solar activity cycle for ordinary type III bursts and micro-type III bursts

    Yuichiro Seki, Hiroaki Misawa, Takahiro Obara, Fuminori Tsuchiya

    2021/06/05

  92. かにパルサーの巨大電波パルス：X線との相関解析のためのデータベース概要

    寺澤敏夫, 榎戸輝揚, 木坂将大, C.-P. Hu, 村田泰宏, 竹内央, 岳藤一宏, 関戸 衛, 米倉覚則, 三澤浩昭, 土屋史紀, 青木貴弘, 徳丸宗利, 本間希樹, 亀谷收, 小山友明, 浅野勝晃, 柴田晋平, 田中周太, Z. Arzoumanian, K. C. Gendreau, the NICER collaboration

    日本天文学会2020年秋季年会　2021/03

  93. かにパルサーの巨大電波パルスに伴うＸ線超過の理論モデル

    木坂将大, 榎戸輝揚, 寺澤敏夫, C.-P. Hu, 村田泰宏, 竹内央, 岳藤一宏, 関戸 衛, 米倉覚則, 三澤浩昭, 土屋史紀, 青木貴弘, 徳丸宗利, 本間希樹, 亀谷收, 小山友明, 浅野勝晃, 柴田晋平, 田中周太, Z. Arzoumanian, K. C. Gendreau, the NICER collaboration

    日本天文学会2021年 春季年会

  94. かにパルサーの巨大電波パルスに伴うＸ線超過の発見

    榎戸輝揚, 寺澤敏夫, 木坂将大, C.-P. Hu, 村田泰宏, 竹内央, 岳藤一宏, 関戸 衛, 米倉覚則, 三澤浩昭, 土屋史紀, 青木貴弘, 徳丸宗利, 本間希樹, 亀谷收, 小山友明, 浅野勝晃, 柴田晋平, 田中周太, Z. Arzoumanian, K. C. Gendreau, the NICER collaboration

    日本天文学会2021年 春季年会

  95. 氷衛星レーダー環境探査に向けた電波伝搬シミュレーション

    安田陸人, 木村智樹, 三澤浩昭, 土屋史紀, 熊本篤志, 笠羽康正

    第22回 惑星圏研究会

  96. 低周波電波観測への誘い – 東北大の取組 –

    三澤浩昭, 土屋史紀, 熊本篤志, 笠羽康正, 北 元, 小林秀行, 寺澤敏夫, 榎戸輝揚, 岳藤一宏, 久保勇樹

    第22回 惑星圏研究会

  97. 木星数MHz帯電波の発生源：偏波特性にもとづく考察

    三澤浩昭, 土屋史紀, 熊本篤志, 笠原禎也, 三好由純, 北原理弘, 中村紗都子

    第22回 惑星圏研究会

  98. 東北大太陽電波望遠鏡の運用状況

    三澤浩昭, 土屋史紀, 小原隆博, 藤本達也, 関 佑一朗

    太陽研究者連絡会シンポジウム

  99. メートル波帯VLBI観測に向けて：飯舘観測所の電波環境

    三澤浩昭, 土屋史紀, 小林秀行, 小山友明, 河野祐介, 赤堀卓也, 高橋慶太郎, 鈴木駿策

    2020年度VLBI懇談会シンポジウム

  100. Energetic electron precipitation associated with pulsating aurora: Statistical analysis

    土屋史紀, 平井あすか, 小原隆博, 三澤浩昭, 三好由純, 塩川和夫, 大矢浩代, M. Connors, 笠原禎也, 熊本篤志, 小路真史, 篠原 育

    地球電磁気・地球惑星圏学会 第148回講演会

  101. 太陽メートル波帯II型電波バーストのスペクトル微細構造と高エネルギー粒子現象との関係 - Ⅱ

    三澤浩昭, 土屋史紀, 小原隆博, 藤本達也, 関 佑一朗

    地球電磁気・地球惑星圏学会 第148回講演会

  102. 3He過剰太陽高エネルギー粒子現象における電子とⅢ型電波バーストの出現特性について

    藤本達也, 三澤浩昭, 土屋史紀, 小原隆博

    地球電磁気・地球惑星圏学会 第148回講演会

  103. Nancay Decameter Arrayデータ を用いた太陽Ⅲ型電波バーストの機械学習を用いた自動検出とその出現の太陽活動依存性の解析

    関 佑一朗, 三澤浩昭, 小原隆博, 土屋史紀, 藤本達也

    地球電磁気・地球惑星圏学会 第148回講演会

  104. 太陽メートル波帯 II 型電波バーストのスペクトル微細構造と高エネルギー粒子現象との関係

    三澤浩昭, 土屋史紀, 小原隆博, 藤本達也, 関 佑一朗

    日本天文学会2020年秋季年会

  105. 327 MHz VLBI experiments on the 450 km baseline in Japan

    K. Takefuji, M. Tokumaru, H. Misawa

    Technology for Next Generation Space-Earth Environmental Radio Science

  106. Metric to decametric radio wave observation systems

    H. Misawa, F. Tsuchiya, A. Kumamoto, Y. Kasaba, T. Kimura, S. Sato, T. Obara

    Technology for Next Generation Space-Earth Environmental Radio Science

  107. Origin of delayed rotational periodicity in the inner magnetosphere of Jupiter

  108. Performance, Operation and their Feasibilities for Jupiter and Icy Moons: High Frequency Receiver of Radio & Plasma Wave Investigation (RPWI) aboard JUICE

  109. Statistical study of EMIC waves and energetic electron precipitation: ground-based magnetometer and subionospheric VLF/LF radio measurements at subauroral latitude

  110. Relationship between solar energetic particles and spectral fine structures of metric type II radio bursts

  111. Decameter Arrayデータを用いた太陽Ⅲ型電波バーストの自動検出とその出現の太陽活動依存性の解析

    関 佑一朗, 三澤浩昭, 土屋史紀, 小原隆博, 藤本達也

    日本地球惑星科学連合2020年大会

  112. 3He過剰太陽高エネルギー粒子現象におけるⅢ型電波バーストの出現特性について

    藤本達也, 三澤浩昭, 土屋史紀, 小原隆博

    日本地球惑星科学連合2020年大会

  113. 低周波電波天文観測への誘い -- 東北大の取組：現在～近未来 --

    三澤浩昭, 笠羽康正, 熊本篤志, 土屋史紀, 木村智樹, 北 元, 佐藤愼也, 小原隆博, 寺澤敏夫, 榎戸輝揚, 岳藤一宏, 久保勇樹, P. Zarka

    日本天文学会2020年春季年会　2020/03/17

  114. Examination of the Relation between Jupiter's Inner Magnetosphere and Magnetic Reconfiguration Events

    Misawa, H., H. Kita and F. Tsuchiya

    The 21st Symposium on Planetary Sciences　2020/02/18

  115. 東北大太陽電波望遠鏡の運用状況

    三澤浩昭,土屋史紀,小原隆博, 藤本達也, 関 佑一朗

    太陽研究者連絡会シンポジウム　2020/02/17

  116. Spatial and temporal characteristics of EMIC wave-driven energetic electron precipitation from ground-based observations

    Hirai, A., F. Tsuchiya, T. Obara, Y. Kasaba, Y. Katoh, H. Misawa, K. Shiokawa, Y. Miyoshi, S. Kurita, and M. Connors

    The 4th PSTEP International Symposium　2020/01/28

  117. Azimuthal variation in the Io plasma torus: New insights from the Hisaki satellite

    F. Tsuchiya, R. Arakawa, H. Misawa, M. Kagitani, R. Koga, F. Suzuki, R. Hikida, K. Yoshioka, A. Steffl, F. Bagenal, P. Delamere, T. Kimura, Y. Kasaba, G. Murakami, I. Yoshikawa, A. Yamazaki, M. Yoneda

    American Geophysical Union 2019 Fall meeting　2019/12/11

  118. Statistical Study of EMIC Wave-Related Electron Precipitation at Subauroral Latitude

    Hirai, A., F. Tsuchiya, T. Obara, Y. Kasaba, Y. Katoh, H. Misawa, K. Shiokawa, Y. Miyoshi, S. Kurita, and M. Connors

    American Geophysical Union 2019 Fall meeting　2019/12/10

  119. 東北大学における低周波天文への取組 - 鹿島34mアンテナによる研究 -

    三澤浩昭、土屋史紀、北 元

    2019年度VLBI懇談会シンポジウム　2019/11/23

  120. 大学規模の太陽系地上観測所、その将来計画： 東北大の場合

    笠羽 康正, 坂野井 健, 鍵谷 将人, 平原 靖大, 三澤 浩昭, 熊本 篤志, 土屋 史紀, 村田 功, 中川 広務, 木村 智樹, 小原 隆博, 岡野 章一, Zarka P.

    地球電磁気・地球惑星圏学会 第146回講演会　2019/10/24

  121. Spiral structure of hot electron in the inner magnetosphere of Jupiter

    2019/10/23

  122. アルマを用いた木星放射線帯変動メカニズムの解明に向けて Invited

    北 元, 佐川 英夫, 垰 千尋, 黒田 剛史, 土屋 史紀, 三澤 浩昭, 笠羽 康正, 藤本 正樹

    地球電磁気・地球惑星圏学会 第146回講演会　2019/10/24

  123. Statistical study of EMIC wave-related electron precipitation at subauroral latitude

    平井 あすか, 土屋 史紀, 小原 隆博, 笠羽 康正, 加藤 雄人, 三澤 浩昭, 塩川 和夫, 三好 由純, 栗田 怜, Connors Martin

    地球電磁気・地球惑星圏学会 第146回講演会　2019/10/23

  124. Examination of the relation between Jupiter's inner magnetosphere and magnetic reconfiguration events - II

    H. Misawa, H. Kita and F. Tsuchiya

    2019/10/24

  125. Passive subsurface radar for exploration of the subsurface structures of Jupiter's icy moons by JUICE/RPWI

    A. Kumamoto, Y. Kasaba, F. Tsuchiya, H. Misawa, T. Kimura, W. Puccio, J.-E. Wahlund, J. Bergman, B. Cecconi, W. Kofman

    Conference on Magnetosphere for the Outer Planets 2019　2019/06/05

  126. High Frequency part in Radio & Plasma Wave Investigation (RPWI) aboard JUICE: Toward the investigation of Jupiter and Icy Moons System

    Y. Kasaba, B. Cecconi, H. Misawa, F. Tsuchiya, A. Kumamoto, T.Kimura, H. Kita, S. Jarzynka, P. Palma, M. Tokarz, Ł. Wiśniewski, W. Puccio, J. Bergman, J.-E. Wahlund

    Conference on Magnetosphere for the Outer Planets 2019　2019/06/05

  127. Software-type Wave-Particle Interaction Analyzer (S-WPIA) by RPWI for JUICE

    Y. Katoh, H. Kojima, K. Asamura, Y. Kasaba, F. Tsuchiya, Y. Kasahara, T. Imachi, H. Misawa, A. Kumamoto, S. Yagitani, K. Ishisaka, T. Kimura, M. Hikishima, Y. Miyoshi, M. Shoji, M. Kitahara, O. Santolik, J. Soucek, J. Bergman, W. Puccio, R. Gill, M. Wieser, W. Schmidt, S. Barabash, and J.-E. Wahlund

    Conference on Magnetosphere for the Outer Planets 2019　2019/06/05

  128. Seasonal variation of north–south asymmetry in the intensity of Saturn Kilometric Radiation from 2004 to 2017

    Y. Nakamura, Y. Kasaba, T. Kimura, L. Lamy, B. Cecconi, G. Fischer, A. Sasaki, C. Tao, F. Tsuchiya, H. Misawa, A. Kumamoto, and A. Morioka

    Conference on Magnetosphere for the Outer Planets 2019　2019/06/03

  129. Azimuthal variation in the Io plasma torus observed by the Hisaki satellite during Ios volcanically active period

    F. Tsuchiya, R. Arakawa, H. Misawa, M. Kagitani, R. Koga, F. Suzuki, R. Hikida, K. Yoshioka, A. Steffl, F. Bagenal, P. Delamere, T. Kimura, Y. Kasaba, G. Murakami, I. Yoshikawa, A. Yamazaki, M. Yoneda

    Conference on Magnetosphere for the Outer Planets 2019　2019/06/04

  130. Expected Source Region of Jupiter's Hectometric Radiation Relating to Magnetotail Reconnection

    H. Misawa, F. Tsuchiya and T. Mizuguchi

    Conference on Magnetosphere for the Outer Planets 2019　2019/06/03

  131. Variations in Jupiter's inner magnetosphere seen by Hisaki: Effects of Io and the solar wind Invited

    F. Tsuchiya, K. Yoshioka, T. Kimura, I. Yoshikawa, G. Murakami, H. Kita, C. Tao, R. Koga, F. Suzuki, R. Hikida, S. Han, M. Kagitani, Y. Kasaba, H. Misawa, T. Sakanoi, M. Kuwabara,, A. Yamazaki

    Conference on Magnetosphere for the Outer Planets 2019　2019/06/05

  132. New pictures of Jovian magnetosphere obtained from the Hisaki satellite observation Invited

    Japan Geoscience Union Meeting 2019　2019/05/27

  133. Statistical study of IPDP type EMIC wave-related electron precipitation at subauroral latitude

    Japan Geoscience Union Meeting 2019　2019/05/29

  134. Investigation of variation mechanisms of the Jovian radiation belt using ALMA

    Japan Geoscience Union Meeting 2019　2019/05/28

  135. The Radio & Plasma Wave Investigation (RPWI) for JUICE for the investigation of Jupiter and Icy Moons System: Contributions from Japan

    Japan Geoscience Union Meeting 2019　2019/05/28

  136. Examination of the relation between Jupiter's inner magnetosphere and magnetic reconfiguration events

    H. Misawa

    Japan Geoscience Union Meeting 2019　2019/05/28

  137. Expected Source Region of Jupiter’s Hectometric Radiation Relating to Magnetotail Reconnection

    Misawa, H, F. Tsuchiya, T. Mizuguchi

    Symposium on Planetary Sciences 2019　2019/02/18

  138. 東北大太陽電波望遠鏡の運用状況

    三澤浩昭, 土屋史紀, 小原隆博, 藤本達也

    太陽研究者連絡会シンポジウム　2019/02/18

  139. Energetic Electron Precipitation and its relation to IPDP type EMIC waves

    Hirai, A, F. Tsuchiya, T. Obara, Y. Kasaba, Y. Katoh, H. Misawa, K. Shiokawa, Y. Miyoshi, S. Kurita, M. Connors

    SGEPSS General Assembly 2018　2018/11/23

  140. One-to-one correspondence between relativistic electron precipitation and pulsating aurora obsrved on 27 March 2017

    Tsuchiya, F, A. Hirai, T. Obara, H. Misawa, S. Kurita, Y. Miyoshi, K. Shiokawa, M. Connors, M. Ozaki, Y. Kasahara, A. Kumamoto, Y. Kasaba, A. Matsuoka, M. Shoji, I. Shinohara

    SGEPSS General Assembly 2018　2018/11/23

  141. Feasibility study of passive subsurface radar using waveform data of Jovian decametric radiation

    Kumamoto, A, F. Tsuchiya, T. Kimura, Y. Kasaba, H. Misawa, P. Walter, J.-E. Wahlund, B. Cecconi, W. Kofman

    SGEPSS General Assembly 2018　2018/11/23

  142. Expected source region of Jupiter’s hectometric radio component relating to magnetotail reconnection

    Misawa, H, F. Tsuchiya, T. Mizuguchi

    SGEPSS General Assembly 2018　2018/11/23

  143. Azimuthal variation in the Io plasma torus observed by the Hisaki satellite from 2013 to 2016

    Tsuchiya, F, R. Arakawa, H. Misawa, M. Kagitani, R. Koga, F. Suzuki, R. Hikida, K. Yoshioka, T. Kimura, Y. Kasaba, G. Murakami, I. Yoshikawa, A. Yamazaki

    SGEPSS General Assembly 2018　2018/11/23

  144. Substorm-time plasma properties at geosynchronous orbit

    Morioka, A, Y. Miyoshi, F. Tsuchiya, Y. Kasaba, H. Misawa

    SGEPSS General Assembly 2018　2018/11/23

  145. サブオーロラ帯におけるEMIC波動と高エネルギー電子降下観測

    平井あすか, 土屋史紀, 小原隆博, 笠羽康正, 加藤雄人, 三澤浩昭, 塩川和夫, 三好由純, 栗田 怜, M. Connors

    第15回 宇宙環境シンポジウム　2018/10/30

  146. The Preamplifier of Radio & Plasma Wave Investigation (RPWI) for the ESA JUICE Mission International-presentation

    Misawa, H, Y. Kasaba, F. Tsuchiya, Y. Kasahara, T. Imachi, T. Kimura, Y. Katoh, A. Kumamoto, H. Kojima, S. Yagitani, M. Ozaki, K. Ishisaka, Y. Miyoshi

    Progress In Electromagnetics Research Symposium 2018　2018/08/01

  147. High Frequency Receiver of Radio and Plasma Waves Investigation Onboard the JUICE Spacecraft International-presentation

    Tsuchiya, F, Y. Kasaba, B. Cecconi, H. Kita, T. Kimura, A. Kumamoto, H. Misawa, Y. Katoh, Y. Kasahara, T. Imachi, H. Kojima, S. Yagitani, M. Ozaki, K. Ishisaka, Y. Miyoshi, J.-E. S. Bergman, W. Puccio, R. Gill, J.-E. Wahlund

    Progress In Electromagnetics Research Symposium 2018　2018/08/01

  148. Volcanic Control of Jupiter's Aurora and Middle Magnetosphere Dynamics Observed by Hisaki/EXCEED and Analysis Improvements by Juno International-presentation

    Tao, C, T. Kimura, F. Tsuchiya, G. Murakami, G. Clarke, R. Ebert, A. Yamazaki, K. Yoshioka, H. Kita, H. Misawa, S. Badman, Y, Kasaba, Y, Yoshikawa, I, M. Fujimoto

    Magnetospheres of the Outer Planets Conference　2018/07/09

  149. Long-term variation of the North - South asymmetry in the intensity of Saturn Kilometric Radiation (SKR) in 2004-2017 International-presentation

    Nakamura, Y, Y. Kasaba, T. Kimura, L. Lamy, B. Cecconi, G. Fischer, A. Sasaki, C. Tao, F. Tsuchiya, H. Misawa, A. Kumamoto, A. Morioka

    Magnetospheres of the Outer Planets Conference　2018/07/09

  150. Identification of Jupiter's hectometric radiation associated with reconnection in the magnesphere International-presentation

    Misawa, H, F. Tsuchiya, T. Mizuguchi

    Magnetospheres of the Outer Planets Conference　2018/07/09

  151. Software-type Wave-Particle Interaction Analyzer (S-WPIA) by RPWI for JUICE International-presentation

    Katoh, Y, H. Kojima, K. Asamura, Y. Kasaba, F, Tsuchiya, Y. Kasahara, T. Imachi, H. Misawa, A. Kumamoto, S. Yagitani, K. Ishisaka, T. Kimura, M. Hikishima, Y. Miyoshi, M. Shoji, M. Kitahara, O, Santolik, J. Soucek, J. Bergman, W. Puccio, R. Gill, M. Wieser, W. Schmidt, S. Barabash, d J.-E, Wahlund

    Magnetospheres of the Outer Planets Conference　2018/07/09

  152. High Frequency part in Radio & Plasma Wave Investigation (RPWI) aboard JUICE: Toward the investigation of Jupiter and Icy Moons System International-presentation

    Kasaba, Y, B. Cecconi, H .Misawa, F. Tsuchiya, A. Kumamoto, T. Kimura, H. Kita, Y. Nakamura, Y. Miyoshi, Y. Kasahara, H. Kojima, S. Jarzynka, P. Palma, M. Tokarz, L. Wisniewski, W. Puccio, J. Bergman, J.-E. Wahlund

    Magnetospheres of the Outer Planets Conference　2018/07/09

  153. Longitudinal variations of the sulfur ions in the Io plasma torus observed by the HISAKI/EXCEED International-presentation

    Arakawa, R, F. Tsuchiya, H. Misawa, M. Kagitani, F. Suzuki, H. Reina, K. Yoshioka, T. Kimura, G. Murakami, I. Yoshikawa, A. Yamazaki

    Magnetospheres of the Outer Planets Conference　2018/07/09

  154. Evaluation of the Wire Probe Antenna (WPT) and Electric Field Detector (EFD) of Plasma Wave Experiment (PWE) aboard ARASE: The data qualifications and cautions from the first-year observations International-presentation

    JpGU2018　2018/05/20

  155. Solar wind influences on Jovian magnetosphere: The collaboration of Hisaki EXCEED, Juno and ground-based telescopes International-presentation

    JpGU2018　2018/05/20

  156. Enhancement of the Jovian Magnetospheric Plasma Circulation Caused by the Change in Plasma Supply From the Satellite Io International-presentation

    土屋史紀, 吉岡和夫, 木村智樹, 古賀亮一, 村上 豪, 山崎 敦, 垰 千尋, 鍵谷将人, 鈴木文晴, 疋田伶奈, 吉川一朗, 笠羽康正, 北 元, 三澤浩昭, 坂野井 健

    JpGU2018　2018/05/20

  157. The Radio & Plasma Wave Investigation (RPWI) for JUICE for the investigation of Jupiter and Icy Moons System: Contributions from Japan International-presentation

    笠羽康正, 三澤浩昭, 土屋史紀, 熊本篤志, 加藤雄人, 木村智樹, 北 元, 中村勇貴, 三好由純, 笠原禎也, 八木谷 聡, 尾崎光紀, 小嶋浩嗣, B. Cecconi, J.-E. Wahlund, RPWI Japan Team

    JpGU2018　2018/05/20

  158. Volcanic Control of Jupiter's Aurora and Middle Magnetosphere Dynamics Observed by Hisaki/EXCEED International-presentation

    垰 千尋, 木村智樹, 土屋史紀, 村上 豪, 吉岡和夫, 山崎 敦, S, Badman, 三澤浩昭, 北 元, 笠羽康正, 吉川一朗, 藤本正樹

    JpGU2018　2018/05/20

  159. Passive subsurface radar for exploration of the subsurface structures of Jupiter’s icy moons by JUICE/RPWI International-presentation

    JpGU2018　2018/05/20

  160. Longitudinal variations of the sulfur ions in the Io plasma torus observed by the HISAKI/EXCEED International-presentation

    JpGU2018　2018/05/20

  161. Sub-relativistic electron precipitation associated with pulsating aurora observed by sub-ionospheric radio propagation during recovery phase of substorm on 27 March 2017 International-presentation

    JpGU2018　2018/05/20

  162. Temporal and spatial correspondence of EMIC waves and energetic electron precipitation observed by ground-based stations on 27 March 2017 International-presentation

    2018/05/20

  163. 太陽電波ゼブラパターンの準周期的変動とその起源

    金田和鷹, 三澤浩昭, 岩井一正, 増田 智, 土屋史紀, 加藤雄人, 小原隆博

    日本地球惑星科学連合2018年大会　2018/05/20

  164. A Juno / Hisaki joint effort to monitor Jupiter’s electron-belt radiation during Juno’s cruise International-presentation

    Santos-Costa、D, C. Tao, H. Kita, T. Kimura, J. Connerney, S. Levin, S. Bolton, G. Murakami, S. Han, F. Tsuchiya, H. Misawa, A. Yamazaki

    JpGU2018　2018/05/20

  165. Identification of Jupiter's hectometric radiation associated with reconnection in the magnetotail International-presentation

    Misawa, H, F. Tsuchiya, T. Mizuguchi

    JpGU2018　2018/05/20

  166. 高校理科教育利用に向けた可搬式木星電波観測システムの開発と実地試験

    佐々木悠朝, 熊本篤志, 三澤浩昭

    日本地球惑星科学連合2018年大会　2018/05/20

  167. Temporal and spatial and corespondence of EMIC waves and energetic electron precipitation observed by ground based stations on 27 March 2017

    Asuka Hirai, Fuminori Tsuchiya, Takahiro Obara, Hiroaki Misawa, Kazuo Shiokawa, Yoshizumi Miyoshi, Satoshi Kurita, Martin Connors

    2018/03/26

  168. Arch Filament System の大気構造とその時間発展

    石川遼太郎, 上野悟, 一本潔, 三澤浩昭, 土屋史紀, 小原隆博

    日本天文学会2018年春季年会　2018/03/14

  169. 木星の磁気圏尾部再結合現象に関連するヘクトメートル電波の同定

    三澤浩昭, 土屋史紀, 水口岳宏

    第19回惑星圏研究会　2018/02/27

  170. HISAKI/EXCEEDで観測されたイオプラズマトーラスにおける硫黄イオンの経度方向変動

    荒川 崚, 三澤浩昭, 土屋史紀, 鍵谷将人, 吉岡和夫, 吉川一朗, 木村智樹, 村上 豪, 山崎敦

    第19回惑星圏研究会　2018/02/27

  171. 東北大HF~UHF帯太陽電波望遠鏡 の運用状況 Invited

    三澤浩昭, 土屋史紀, 小原隆博, 金田和鷹

    太陽研究連絡者シンポジウム　2018/02/19

  172. Detection of Propagating Fast Sausage Waves through a Detailed Analysis of a Zebra Pattern Fine Structure in a Solar Radio Burst International-presentation

    Kazutaka Kaneda, Hiroaki Misawa, Kazumasa Iwai, S Masuda, Fuminori Tsuchiya, Yuto Katoh, Takahiro Obara

    AGU fall meeting　2017/12/11

  173. Variations of System IV period of the sulfur ions in the Io torus for the volcanic event in 2015 observed by the HISAKI/EXCEED International-presentation

    Arakawa Ryo, Hiroaki Misawa, Fuminori Tsuchiya, Masato Kagitani, Kazuo Yoshioka, Ichiro Yoshikawa, Tomoki Kimura, Go Murakami, Atsushi Yamazaki

    AGU fall meeting　2017/12/11

  174. Energetic electron precipitations observed by VLF/LF sub-ionospheric propagation: ARASE and ground-based observation campaign

    Fuminori Tsuchiya, Takahiro Obara, Asuka Hirai, Hiroaki Misawa, Kazuo Shiokawa, Yoshizumi Miyoshi, Yasunobu Ogawa, Hiroyo Ohya, Martin Connors, Takeshi Sakanoi, Donald Hampton

    2017/10/15

  175. 木星ヘクトメータ電波の発生特性の再考

    三澤 浩昭, 水口 岳宏, 土屋 史紀

    地球電磁気・地球惑星圏学会第142 回講演会　2017/10/15

  176. Io-related electron heating in the Io plasma torus: effect of local plasma density around Io

    Fuminori Tsuchiya, Kazuo Yoshioka, Masato Kagitani, Tomoki Kimura, Go Murakami, Atsushi Yamazaki, Hiroaki Misawa, Yasumasa Kasaba, Ichiro Yoshikawa, Takeshi Sakanoi, Ryoichi Koga, Ryo Arakawa, Fumiharu Suzuki, Reina Hikida

    2017/10/15

  177. 情報通信研究機構－ 東北大学統合太陽電波観測データアーカイブ

    石橋 弘光, 三澤 浩昭, 岩井 一正, 直井 隆浩, 土屋 史紀, 久保 勇樹

    地球電磁気・地球惑星圏学会第142 回講演会　2017/10/15

  178. Study of the correlation between nKOM and reconnection in theJovian magnetosphere: Inward radial transport in the magnetosphere

    水口岳宏, 三澤浩昭, 土屋史紀, 小原隆博

    地球電磁気・地球惑星圏学会第142 回講演会　2017/10/15

  179. 伝搬性ファストソーセージモード波動により変調された太陽電波ゼブラパターンの観測

    金田和鷹, 三澤浩昭, 岩井一正, 増田智, 土屋史紀, 加藤雄人, 小原隆博

    地球電磁気・地球惑星圏学会第142 回講演会　2017/10/15

  180. Energetic electron precipitation associated with Pc1/EMIC waves:Six-month LF-wave observations over North America

    2017/10/15

  181. HISAKI衛星で観測された2015 年イオ火山イベントにおけるイオトーラス中硫黄イオンのSystem IV周期の変動

    荒川崚, 三澤浩昭, 土屋史紀, 鍵谷将人, 吉川一朗, 吉岡和夫, 鈴木文晴, 木村智樹, 村上豪, 山崎敦

    地球電磁気・地球惑星圏学会第142 回講演会　2017/10/15

  182. Arch Filament System の大気構造とその時間発展

    石川遼太郎, 上野悟, 一本潔, 三澤浩昭, 土屋史紀, 小原隆博

    天文学会2017年秋季年会　2017/09/11

  183. 太陽電波ゼブラパターンの準周期的変動

    金田和鷹, 三澤浩昭, 岩井一正, 増田智, 土屋史紀, 小原隆博, 加藤雄人

    天文学会2017年秋季年会　2017/09/11

  184. Temporal Variation of Zebra Stripes In Type Iv Solar Radio Bursts International-presentation

    Kazutaka Kaneda, Hiroaki Misawa, Kazumasa Iwai, S Masuda, Fuminori Tsuchiya, Yuto Katoh, Takahiro Obara

    AOGS2017　2017/08/08

  185. Juno-Ground-Radio Observation Support Tools International-presentation

    Baptiste Cecconi, Philippe, Zarka、Renaud Savalle, Pierre Lesidaner, Corentin Louis、Laurent Lamy、Andree Coffre、Laurent Denis、Cedric Viou、Alexander A Konovalenko, Vyacheslav Zakharenko, Serge Yerin, Anastasia Skoryk, Yasumasa Kasaba, Hiroaki Misawa, Fuminori Tsuchiya, Yasuhide Hobara, Tomoyuki Nakajo, Kasumasa Imai, Vladimir Riabov, Hanna Rothkaehl, Glenn S Orton, Tom Momary, Jean-Mathias Griessmeier, Masafumi Imai, Julien N Girard, Marin Anderson, Nicolas Andre、Vincent Genot、Rob Ebert, Tobia Carozzi, Tomoki Kimura, William S Kurth, Chuck A Higgins, John L Mugler, Dave Typinski, Tracy Clarke, Jim Sky、Richard Flagg、Francisco Reyes, Wes Greenman, Jim Brown, Andy Mount, Tom Ashcraft, Jim Thieman, Whit Reeve, Shing Fung, Todd King、Mark Sharlow, Scott Bolton

    JpGU-AGU Joint Meeting 2017　2017/05/20

  186. Characteristics of solar wind control on Jovian UV auroral activity obtained from Hisaki EXCEED and ground-based observations International-presentation

    Hajime Kita, Tomoki Kimura, Chihiro Tao, Fuminori Tsuchiya, Atsushi Yamazaki, Kazuo Yoshioka, Hiroaki Misawa, Takeshi Sakanoi, Yasumasa Kasaba, Ichiro Yoshikawa, Masaki Fujimoto

    JpGU-AGU Joint Meeting 2017　2017/05/20

  187. Development status of the metadata server and data archives at Tohoku University for collaborative studies using planetary radio and spectroscopic data International-presentation Invited

    Atsushi Kumamoto, Fuminori Tsuchiya, Hiroaki Misawa, Masato Kagitani, Hajime Kita, Tomoki Kimura, Chihiro Tao, Kazumasa Imai, Tomoyuki Nakajo, Baptiste Cecconi

    JpGU-AGU Joint Meeting 2017　2017/05/20

  188. Reconsideration of the relation between Jupiter's auroral radio activities and Io's volcanic variations International-presentation

    2017/05/20

  189. 高校理科教育での利用に向けた可搬式木星電波受信システムの開発

    佐々木 悠朝, 熊本 篤志, 三澤 浩昭

    JpGU-AGU Joint Meeting 2017　2017/05/20

  190. Occurrence characteristics of Type-III solar radio bursts in the solar quiet period

    松本 紗歩, 三澤 浩昭, 土屋 史紀, 増田 智, 小原 隆博

    JpGU-AGU Joint Meeting 2017　2017/05/20

  191. 太陽電波ゼブラパターンにおける縞構造の時間変動

    金田和鷹, 三澤浩昭, 岩井一正, 土屋史紀, 小原隆博, 加藤雄人, 増田智

    JpGU-AGU Joint Meeting 2017　2017/05/20

  192. EMIC waves-driven radiation belt electron precipitation into the atmosphere with ground-based observations in the subauroral region

    Hirai, A, F. Tsuchiya, T. Obara, H. Misawa, K. Shiokawa, Y. Miyoshi

    JpGU-AGU Joint Meeting 2017　2017/05/20

  193. Variations of System IV period of the sulfur ions in the Io torus for thevolcanic event in 2015

    Arakawa Ryo, Hiroaki Misawa, Fuminori Tsuchiya, Masato Kagitani, Ichiro Yoshikawa, Kazuo Yoshioka, Fumiharu Suzuki, Tomoki Kimura, Go Murakami, Atsushi Yamazaki

    JpGU-AGU Joint Meeting 2017　2017/05/20

  194. A 3D tomographic reconstruction method to analyze Jupiter's electron-belt emission observations International-presentation

    Santos-Costa, D, J. Girard, C. Tasse, P. Zarka, H. Kita, F. Tsuchiya, H. Misawa, G. Clark, F. Bagenal, M. Imai, H.N. Becker, M.A. Janssen, S. Bolton, S.M. Levin, J.E.P. Connerney

    19th EGU General Assembly, EGU2017　2017/04/23

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    その他

  195. Development status of metadata server and data archives at Tohoku University for collaborative studies using planetary radio and spectroscopic data

    A. Kumamoto, F. Tsuchiya, Y. Kasaba, H. Misawa, M. Kagitani, T. Kimura, C. Tao, B. Cecconi

    第18回惑星圏研究会　2017/02/20

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    その他

  196. Characteristics of solar wind control on Jovian UV auroral activity obtained from Hisaki EXCEED and ground-based observations

    Hajime Kita, Tomoki Kimura, Chihiro Tao, Fuminori Tsuchiya, Atsushi Yamazaki, Go Murakami, Kazuo Yoshioka, Hiroaki Misawa, Takeshi Sakanoi, Yasumasa Kasaba, Ichiro Yoshikawa, Masaki Fujimoto

    第18回惑星圏研究会　2017/02/20

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    その他

  197. Variations of System IV period of the sulfur ions in the Io torus for the volcanic event in 2015

    R. Arakawa, H. Misawa, F. Tsuchiya, F. Suzuki, K. Yoshioka, M. Kagitani, G. Murakami, A. Yamazaki, T. Kimura, I. Yoshikawa

    第18回惑星圏研究会　2017/02/20

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    本学学生

  198. Study of the EUV emission correlating with substorm-like events in the Jovian magnetosphere

    T. Mizuguchi, H. Misawa, F. Tsuchiya, T. Obara

    第18回惑星圏研究会　2017/02/20

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    本学学生

  199. Occurrence characteristics of Jupiter's quasi-periodic decametric radio emission in the magnetospheric plasma enhancement period

    H. Misawa, F. Tsuchiya

    第18回惑星圏研究会　2017/02/20

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    本人

  200. The Radio and Plasma Wave Investigation (RPWI) for JUICE: Science planning and engineering model development

    Y. Kasaba, H. Misawa, F. Tsuchiya, Y. Kasahara, T. Imachi, T. Kimura, Y. Katoh, A. Kumamoto, H. Kojima, S. Yagitani, K. Ishisaka, Y. Miyoshi

    第18回惑星圏研究会　2017/02/20

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    その他

  201. 東北大太陽電波望遠鏡の運用状況

    三澤浩昭, 土屋史紀, 小原隆博, 金田和鷹, 松本紗歩

    太陽研究者連絡会シンポジウム　2017/02/20

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    本人

  202. 太陽電波ゼブラパターンの周波数間隔の変動

    金田和鷹, 三澤浩昭, 岩井一正, 土屋史紀, 小原隆博

    太陽研究者連絡会シンポジウム　2017/02/20

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    本学学生

  203. Statistical study of solar wind control on Jovian UV auroral activity obtained from long-term Hisaki EXCEED observations International-presentation

    Hajime Kita, Tomoki Kimura, Chihiro Tao, Fuminori Tsuchiya, Atsushi Yamazaki, Go Murakami, Kazuo Yoshioka, Hiroaki Misawa, Takeshi Sakanoi, Yasumasa Kasaba, Ichiro Yoshikawa, Masaki Fujimoto

    the 2016 AGU Fall Meeting　2016/12/12

  204. Io's volcanic influence on the Jovian magnetosphere: Observational evidence from the HISAKI observation International-presentation

    Fuminori Tsuchiya, Masato Kagitani, Mizuki Yoneda, Tomoki Kimura, Kazuo Yoshioka, Go Murakami, Chihiro Tao, Hiroaki Misawa, Atsushi Yamazaki, Ichiro Yoshikawa, Yasumasa Kasaba, Takeshi Sakanoi

    the 2016 AGU Fall Meeting　2016/12/12

  205. ゼブラパターンの存否による太陽電波IV型バーストの特性の違い

    金田和鷹, 三澤浩昭, 岩井一正, 土屋史紀, 小原隆博, 加藤雄人, 増田 智

    第140回地球電磁気・地球惑星圏学会講演会　2016/11/20

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    本学学生

  206. 太陽フレアの規模とIII型電波バーストの出現特性の関係

    松本紗歩, 三澤浩昭, 土屋史紀, 小原隆博

    第140回地球電磁気・地球惑星圏学会講演会　2016/11/20

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    本学学生

  207. Change in radial distribution of Io plasma torus and Jupiter’s aurora activity during Io's volcanic active period in 2015

    Fuminori Tsuchiya, Masato Kagitani, Mizuki Yoneda, Tomoki Kimura, Kazuo Yoshioka, Go Murakami, Chihiro Tao, Hiroaki Misawa, Atsushi Yamazaki, Ichiro Yoshikawa, Yasumasa Kasaba, Takeshi Sakanoi

    第140回地球電磁気・地球惑星圏学会講演会　2016/11/20

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    その他

  208. Statistical study of solar wind control on Jovian UV aurora obtained from Hisaki EXCEED observations

    Hajime Kita, Tomoki Kimura, Chihiro Tao, Fuminori Tsuchiya, Atsushi Yamazaki, Go Murakami, Kazuo Yoshioka, Hiroaki Misawa, Takeshi Sakanoi, Yasumasa Kasaba, Ichiro Yoshikawa, Masaki Fujimoto

    第140回地球電磁気・地球惑星圏学会講演会　2016/11/20

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    その他

  209. 木星磁気圏サブストームと関係するnKOM放射の特徴についての研究

    水口岳宏, 三澤浩昭, 土屋史紀, 小原隆博

    第140回地球電磁気・地球惑星圏学会講演会　2016/11/20

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    本学学生

  210. 木星磁気圏プラズマ変動期における準周期的オーロラ電波の出現特性

    三澤浩昭, 土屋史紀

    第140回地球電磁気・地球惑星圏学会講演会　2016/11/20

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    本人

  211. 地上電波観測による木星デカメータ電波Sバースト放射源の鉛直分布の研究

    佐々木悠朝, 熊本篤志, 加藤雄人, 三澤浩昭

    第140回地球電磁気・地球惑星圏学会講演会　2016/11/20

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    その他

  212. Measurement of Jupiter's synchrotron radiation during the HISAKI-JUNO campaign

    Fuminori Tsuchiya, Hiroaki Misawa, Hajime Kita

    第140回地球電磁気・地球惑星圏学会講演会　2016/11/20

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    その他

  213. The Radio and Plasma Wave Investigation (RPWI) for JUICE: Start of Engineering Model Development

    Yasumasa Kasaba, Hiroaki Misawa, Fuminori Tsuchiya, Yoshiya Kasahara, Tomohiko Imachi, Tomoki Kimura, Yuto Katoh, Atsushi Kumamoto, Hirotsugu Kojima, Satoshi Yagitani, Keigo Ishisaka, Yoshizumi Miyoshi

    第140回地球電磁気・地球惑星圏学会講演会　2016/11/20

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    その他

  214. France-Japan collaborations in development of integrated data archives of Jovian DAM

    Atsushi Kumamoto, Fuminori Tsuchiya, Yasumasa Kasaba, Hiroaki Misawa, Yuto Katoh, Hajime Kita, Keiichiro Fukazawa, Tomoki Kimura, Manabu Yagi, Yoshizumi Miyoshi, Kazumasa Imai, Masafumi Imai, Tomoyuki Nakajo, Chihiro Tao

    第140回地球電磁気・地球惑星圏学会講演会　2016/11/20

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    その他

  215. Variation characteristics of Jupiter’s hectomectric radiation during the Iogenic plasma enhancement period International-presentation

    H. Misawa, F. Tsuchiya, T. Kimura, Y. Kasaba, A. Kumamoto

    8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions　2016/10/25

  216. Total flux measurement of Jupiter’s synchrotron radiation during the HISAKI and JUNO campaign periods International-presentation

    F. Tsuchiya, H. Misawa, H. Kita

    8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions　2016/10/25

  217. Feasibility of the exploration of the subsurface structures of Jupiter’s icy moons by Jovian hectometric radiation International-presentation

    A. Kumamoto, Y. Kasaba, F. Tsuchiya, H. Misawa, W. Puccio, J.-E. Wahlund, J. Bergman

    8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions　2016/10/25

  218. Science objectives and implementation of Software-type Wave-Particle Interaction Analyzer (SWPIA) by RPWI for JUICE International-presentation

    Y. Katoh, H. Kojima, K. Asamura, Y. Kasaba, F. Tsuchiya, Y. Kasahara, T. Imachi, H. Misawa, A. Kumamoto, S. Yagitani, K. Ishisaka, T. Kimura, Y. Miyoshi, M. Shoji, M. Kitahara, O. Santolik, J.-E. Wahlund

    8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions　2016/10/25

  219. Database of solar radio bursts observed by solar radio spectro-polarimeter AMATERAS International-presentation

    F. Tsuchiya, H. Misawa, K. Iwai, K. Kaneda, S. Matsumoto, A. Kumamoto, M. Yagi, B. Cecconi

    8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions　2016/10/25

  220. Juno-ground-radio observation support International-presentation

    B. Cecconi, P. Zarka, R. Savalle, P. Le Sidaner, A. Coffre, L. Denis, C. Viou, A. A. Konovalenko, A. Skoryk, S. Yerin, Y. Kasaba, A. Kumamoto, H. Misawa, T. Tsuchiya

    8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions　2016/10/25

  221. Statistical analysis of periodicity of Jovian S-burst International-presentation

    A. Kumamoto, S. Kakimoto, Y. Sasaki, H. Misawa, Y. Katoh, F. Tsuchiya, B. Cecconi

    8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions　2016/10/25

  222. 太陽電波ゼブラパターンの統計的偏波特性-II

    金田和鷹, 三澤浩昭, 岩井一正, 土屋史紀, 小原隆博

    日本天文学会2016年秋季年会　2016/09/14

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    本学学生

  223. HF - UHF Solar radio telescopes in Tohoku Univ. : Introduction of the system and science results International-presentation

    H. Misawa, F. Tsuchiya, K. Iwai, K. Kaneda, Y. Katoh, H. Kashiwagi, S. Masuda, Y. Miyoshi, T. Obara

    Solar Physics with Radio Observations - Continued Operation of Nobeyama Radioheliograph -　2016/09/09

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    本人

  224. Polarization Characteristics of Zebra Patterns in Type IV Solar Radio Bursts and a Possible Mechanism of Depolarization International-presentation

    K. Kaneda, H. Misawa, K. Iwai, F. Tsuchiya, T. Obara, Y. Katoh, S. Masuda

    Solar Physics with Radio Observations - Continued Operation of Nobeyama Radioheliograph -　2016/09/09

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    本学学生

  225. Polarization Characteristics of Zebra Pattern in Solar Radio Bursts and Their Generation Mechanisms International-presentation

    K. Kaneda, H. Misawa, K. Iwai, F. Tsuchiya, T. Obara

    Asia Oceania Geosciences Society 12th Annual Meeting　2016/07/31

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    本学学生

  226. Polarization Characteristics and Depolarization Processes of Zebra Pattern in Type IV Solar Radio Bursts International-presentation

    K. Kaneda, H. Misawa, K. Iwai, F. Tsuchiya, T. Obara

    6th East-Asia School and Workshop on Laboratory, Space, Astrophysical Plasmas　2016/07/11

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    本学学生

  227. Sharing Low Frequency Radio Emissions in the Virtual Observatory: Application for JUNO-Ground-Radio Observations Support

    B. Cecconi, R. Savalle, P. Le Sidaner, S. Hess, S. Erard, P. Zarka, L. Lamy, A. Coffre, L. Denis, N. Andre, V. Genot, J. Girard, J.-M. Griessmeier, T. Clarke, M. Anderson, R. Ebert, C. Higgins, J. Sky, J. Thieman, D. Typinski, Y. Hobara, K. Imai, W. S. Kurth, M. Imai, Y. Kasaba, A. Kumamoto, F. Tsuchiya, H. Misawa, A. Konovalenko, T. Nakajo, G. S. Orton, V. Ryabov

    日本地球惑星科学連合2016年大会　2016/05/22

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    その他

  228. Development status of Iitate Jovian radio wave data archive as a unit of integrated archives of data from multiple ground stations for collaboration with Juno

    A. Kumamoto, F. Tsuchiya, H. Misawa, M. Yagi, Y. Kasaba, B. Cecconi

    日本地球惑星科学連合2016年大会　2016/05/22

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    その他

  229. 北陸冬季雷が下部電離圏に及ぼす影響

    森永洋介, 土屋史紀, 小原隆博, 三澤浩昭, 本間規泰, 佐藤光輝, 大矢浩代

    日本地球惑星科学連合2016年大会　2016/05/22

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    本学学生

  230. 地上観測に基づく木星デカメータ電波S-burst電波源高度分布の導出と木星電離圏アルフヴェン共鳴モデルの検証

    佐々木悠朝, 熊本篤志, 加藤雄人, 三澤浩昭

    日本地球惑星科学連合2016年大会　2016/05/22

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    本学学生

  231. 木星磁気圏プラズマ変動期における放射線帯電波の観測

    三澤浩昭, 土屋史紀, 佐藤愼也, 北元, 関戸衛, 岳藤一宏, 川合栄治, 近藤哲朗, 長谷川新

    日本地球惑星科学連合2016年大会　2016/05/22

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    本人

  232. イオプラズマトーラス発光非対称からの木星内部磁気圏における朝夕電場の評価

    荒川崚, 村上豪, 三澤浩昭, 土屋史紀, 北 元

    日本地球惑星科学連合2016年大会　2016/05/22

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    本人

  233. LF帯標準電波を用いた2011年東北地方太平洋沖地震後のD領域電離圏擾乱

    大矢浩代, 瀧下雄太, 土屋史紀, 中田裕之, 塩川和夫, 三好由純, 小原隆博, 三澤浩昭

    日本地球惑星科学連合2016年大会　2016/05/22

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    その他

  234. 太陽電波バースト中のゼブラパターンの偏波とそのスペクトル特性の比較

    金田和鷹, 三澤浩昭, 岩井一正, 土屋史紀, 小原隆博

    日本地球惑星科学連合2016年大会　2016/05/22

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    本学学生

  235. 太陽電波II型バーストのスペクトル微細構造の統計的出現特性

    柏木啓良, 三澤浩昭, 土屋史紀, 小原隆博, 増田 智, 岩井一正

    日本地球惑星科学連合2016年大会　2016/05/22

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    本学学生

  236. フレアの規模とIII型バーストの出現特性の関係

    松本紗歩, 三澤浩昭, 土屋史紀, 小原隆博

    日本地球惑星科学連合2016年大会　2016/05/22

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    本学学生

  237. Io's volcanic influence on the Jovian magnetosphere: HISAKI observation

    Fuminori Tsuchiya, Kazuo Yoshioka, Tomoki Kimura, Go Murakami, Mizuki Yoneda, Ryoichi Koga, Masato Kagitani, Hiromasa Nozawa, Chihiro Tao, Hiroaki Misawa, Takeshi Sakanoi, Yasumasa Kasaba, Atsushi Yamazaki, Ichiro Yoshikawa

    日本地球惑星科学連合2016年大会　2016/05/22

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    その他

  238. Feasibility of the exploration of the subsurface structures of Jupiter’s icy moons by Jovian hectometric radiation

    Atsushi Kumamoto, Yasumasa Kasaba, Hiroaki Misawa, Fuminori Tsuchiya

    日本地球惑星科学連合2016年大会　2016/05/22

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    その他

  239. Software-type Wave-Particle Interaction Analyzer (SWPIA) by RPWI for JUICE: Science objectives and implementation

    Yuto Katoh, Hirotsugu Kojima, Kazushi Asamura, Yasumasa Kasaba, Fuminori Tsuchiya, Yoshiya Kasahara, Tomohiko Imachi, Hiroaki Misawa, Atsushi Kumamoto, Satoshi Yagitani, Keigo Ishisaka, Tomoki Kimura, Yoshizumi Miyoshi, Masafumi Shoji, Masahiro Kitahara, Ondrej Santolik, Jan-Erik Wahlund

    日本地球惑星科学連合2016年大会　2016/05/22

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    その他

  240. Statistical study of the response of Jovian EUV aurora to the solar wind from Hisaki observations

    Hajime Kita, Tomoki Kimura, Chihiro Tao, Fuminori Tsuchiya, Hiroaki Misawa, Takeshi Sakanoi, Yasumasa Kasaba, Go Murakami, Kazuo Yoshioka, Atsushi Yamazaki, Ichiro Yoshikawa

    日本地球惑星科学連合2016年大会　2016/05/22

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    その他

  241. Investigation of solar energetic particle events based on development of a new HF-VHF radio observation system International-presentation

    H. Misawa, T. Obara, F. Tsuchiya, S. Satoh, K. Iwai, S. Masuda, Y. Miyoshi, D. Shiota

    International GEMSIS and ASINACTR-G2602 Workshop　2016/03/22

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    本人

  242. 太陽電波ゼブラパターンの統計的偏波特性

    金田和鷹, 三澤浩昭, 岩井一正, 土屋史紀, 小原隆博

    日本天文学会2016年春季年会　2016/03/14

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    本学学生

  243. Statistical study of the response of Jovian EUV aurora to the solar wind from Hisaki observations

    H. Kita, T. Kimura, C. Tao, F. Tsuchiya, H. Misawa, T. Sakanoi, Y. Kasaba, G. Murakami, K. Yoshioka, A. Yamazaki, I. Yoshikawa

    第17回惑星圏研究会　2016/02/22

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    その他

  244. Study on the vertical distribution of Jovian decametric S-burst sources based on the ground-based radio observation

    Sasaki, Y, A. Kumamoto, Y. Katoh, H. Misawa

    第17回惑星圏研究会　2016/02/22

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    本学学生

  245. Galileo observation of energetic electrons and plasma waves at nKOM source region

    Kurita, S, H. Misawa

    第17回惑星圏研究会　2016/02/22

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    その他

  246. Feasibility of the exploration of the subsurface structure of the Jupiter's icy moon by Jovian radiowaves

    第17回 惑星圏研究会　2016/02/22

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    その他

  247. Summary of JSPS program on international collaboration for planetary plasma and atmospheric

    Sakanoi, T, M. Kagitani, H. Nakagawa, N. Terada, T. Kuroda, Y. Kasaba, T. Obara, H. Misawa

    第 17回 惑星圏研究会　2016/02/22

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    その他

  248. 東北大太陽電波望遠鏡の運用状況

    三澤浩昭, 土屋史紀, 小原隆博, 岩井一正, 金田和鷹, 柏木啓良, 松本紗歩

    太陽研究者連絡会シンポジウム　2016/02/15

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    本人

  249. 太陽電波ゼブラパターンの偏波特性とその放射機構

    金田和鷹, 三澤浩昭, 岩井一正, 土屋史紀, 小原隆博

    太陽研究者連絡会シンポジウム　2016/02/15

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    本学学生

  250. 太陽電波II型バーストのスペクトル微細構造の統計的出現特性

    柏木 啓良, 三澤 浩昭, 土屋史紀, 小原隆博, 増田 智, 岩井一正

    太陽研究者連絡会シンポジウム　2016/02/15

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    本学学生

  251. Development of a new solar radio telescope in the HF to VHF band for space weather research International-presentation

    H. Misawa, T. Obara, F. Tsuchiya, S. Satoh, K. Iwai, S. Masuda, Y. Miyoshi, D. Shiota

    International Symposium PSTEP-1　2016/01/13

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    本人

  252. Relationship between Solar Eruptive Phenomena and the Spectral Fine Structure in Solar Radio Bursts International-presentation

    Kaneda, K, H. Misawa, F. Tsuchiya, K. Iwai, T. Obara

    International Symposium PSTEP-1　2016/01/13

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    本学学生

  253. Investigation of solar energetic particle events by developing a new solar radio observation system

    H. Misawa, T. Oabara, F. Tsuchiya, K. Iwai, S. Masuda, Y. Miyoshi, D. Shiota

    第138回地球電磁気・地球惑星圏学会講演会　2015/10/31

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    本人

  254. 北陸冬季雷と関連する下部電離圏擾乱の二周波観測

    森永 洋介, 土屋 史紀, 小原 隆博, 三澤 浩昭, 本間 規泰

    第138回地球電磁気・地球惑星圏学会講演会　2015/10/31

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    本学学生

  255. 太陽電波 IV 型バースト中の微細構造ゼブラパターンの偏波解析によるdepolarization 過程の検討

    金田 和鷹, 三澤 浩昭m, 岩井 一正, 土屋 史紀, 小原 隆博

    第138回地球電磁気・地球惑星圏学会講演会　2015/10/31

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    本学学生

  256. The Radio and Plasma Wave Investigation (RPWI) for JUICE: Contributions from Japan

    Kasaba, Y, H. Misawa, F. Tsuchiya, Y. Kasahara, T. Imachi, T. Kimura, Y. Katoh, A. Kumamoto, H. Kojima, S. Yagitani, K. Ishisaka, Y. Miyoshi

    第138回地球電磁気・地球惑星圏学会講演会　2015/10/31

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    その他

  257. Variation characteristics of Jupiter's HOM emission during the HISAKI observation campaign in 2015

    Misawa, H, F. Tsuchiya, T. Kimura, Y. Kasaba, A. Kumamoto

    第138回地球電磁気・地球惑星圏学会講演会　2015/10/31

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    本人

  258. 東北大地上観測にもとづく木星デカメータ電波データアーカイブ

    熊本 篤志, 佐々木 悠朝, 加藤 雄人, 八木 学, 土屋 史紀, 三澤 浩昭

    第138回地球電磁気・地球惑星圏学会講演会　2015/10/31

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    その他

  259. Verification of Jovian ionospheric Alfven resonator by event analyses of ground-base observation

    Sasaki, Y, A. Kumamoto, Y. Katoh, H. Misawa

    第138回地球電磁気・地球惑星圏学会講演会　2015/10/31

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    本学学生

  260. 太陽電波IV型バースト中の微細構造ゼブラパターンの放射過程におけるX モードの出現過程

    金田和鷹, 三澤浩昭, 岩井一正, 土屋史紀, 小原隆博

    日本天文学会2015年秋季年会　2015/09/09

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    本学学生

  261. Polarization Characteristics of Zebra Pattern in Type IV Solar Radio Bursts Observed with AMATERAS

    Kaneda, K, H. Misawa, F. Tsuchiya, T. Obara, K. Iwai

    Asia Oceania Geosciences Society 2015　2015/08/02

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    本学学生

  262. 広帯域太陽電波常時観測による太陽活動危険状態の研究

    三澤浩昭, 小原隆博, 土屋史紀, 増田 智, 岩井一正

    東北大学災害科学国際研究所 平成26年度特定プロジェクト研究成果報告会　2015/07/12

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    本人

  263. HF～VHF帯太陽電波新観測装置の初期観測結果

    三澤浩昭, 小原隆博, 岩井一正, 土屋史紀

    日本地球惑星科学連合2015年大会　2015/05/24

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    本人

  264. AMATERASによって観測された太陽電波IV型バースト中のzebra patternの偏波特性

    金田 和鷹, 三澤 浩昭, 土屋 史紀, 小原 隆博, 岩井 一正

    日本地球惑星科学連合2015年大会　2015/05/24

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    本学学生

  265. 複数局統合アーカイブに向けた飯舘木星電波スペクトルアーカイブの構築

    森永 洋介, 土屋 史紀, 小原 隆博, 三澤 浩昭, 本間 規泰

    日本地球惑星科学連合2015年大会　2015/05/24

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    本学学生

  266. 木星デカメータ電波スペクトルに基づく氷衛星地下海探査の実現可能性

    熊本 篤志, 笠羽 康正, 三澤 浩昭, 土屋 史紀

    日本地球惑星科学連合2015年大会　2015/05/24

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    その他

  267. AMATERASで観測された太陽電波II型バーストのスペクトル微細構造の統計解析

    柏木 啓良, 三澤 浩昭, 土屋 史紀, 岩井 一正, 小原 隆博

    日本地球惑星科学連合2015年大会　2015/05/24

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    本学学生

  268. 木星熱圏・放射線帯の太陽紫外線応答について

    北 元, 三澤 浩昭, 土屋 史紀, 垰 千尋, 坂野井 健, 笠羽 康正, 森岡 昭

    日本地球惑星科学連合2015年大会　2015/05/24

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    その他

  269. The Radio & Plasma Wave Investigation (RPWI) for JUICE: Contribution plan from Japan

    笠羽 康正, 三澤 浩昭, 土屋 史紀, 笠原 禎也, 井町 智彦, 木村 智樹, 加藤 雄人, 熊本 篤志, 小嶋 浩嗣, 八木谷 聡, 石坂 圭吾, 三好 由純, RPWI-Japan, tea

    日本地球惑星科学連合2015年大会　2015/05/24

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    その他

  270. Science objectives and implementation of Software-type Wave-Particle Interaction Analyzer (SWPIA) by RPWI for JUICE

    加藤 雄人, 小嶋 浩嗣, 浅村 和史, 笠羽 康正, 土屋 史紀, 笠原 禎也, 井町 智彦, 三澤 浩昭, 熊本 篤志, 八木谷 聡, 石坂 圭吾, 木村 智樹, 三好 由純, RPWI-JAPAN, Team

    日本地球惑星科学連合2015年大会　2015/05/24

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    その他

  271. AMATERASによって観測された太陽電波IV型バースト中のzebra patternの偏波特性

    金田和鷹, 三澤浩昭, 土屋史紀, 小原隆博, 岩井一正

    日本天文学会2015年春季年会　2015/03/18

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    本学学生

  272. Observations of solar radio bursts using a high-resolution spectro-polarimeter International-presentation

    Hiroaki Misawa, Fuminori Tsuchiya, Kazumasa Iwai, Takahiro Obara, Yuto Katoh, Shintaro Sato, Kazutaka Kaneda, Hirotaka Kashiwagi

    The 3rd Asia Oceania Space Weather Alliance Workshop　2015/03/02

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    本人

  273. Comparison study of EUV brightness obtained by Hisaki and Jovian decametric radiation obtained by ground-based observations

    A. Kumamoto, H. Misawa, F. Tsuchiya

    惑星圏研究会　2015/02/16

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    その他

  274. Variation characteristics of Jupiter’s hectometric radiation during the Jupiter observation campaign in Jan., 2014

    H. Misawa, F. Tsuchiya, T. Kimura, A. Kumamoto

    惑星圏研究会　2015/02/16

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    本人

  275. Analysis of the emission frequency of Jovian S-burst for verification of Jovian ionospheric Alfven resonator

    Y. Sasaki, A. Kumamoto, Y. Katoh, H. Misawa

    惑星圏研究会　2015/02/16

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    本学学生

  276. The Structure of Io Torus Inferred from ECH Wave Spectra Observed by Galileo

    S. Kurita, H. Misawa

    惑星圏研究会　2015/02/16

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    その他

  277. JUICE-JAPAN WG JUpiter ICy moon Explorer mission ? Radio & Plasma Wave Investigation (RPWI): Contribution plan from Japan

    Y. Kasaba, H. Misawa, F. Tsuchiya, Y. Kasahara, T. Imachi, T. Kimura, Y. Katoh, A. Kumamoto, H. Kojima, S. Yagitani, K. Ishisaka, Y. Miyoshi, RPWI Japan

    惑星圏研究会　2015/02/16

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    その他

  278. ひさき衛星を用いた木星放射線帯の朝夕非対称に関する考察

    北元, 土屋史紀, 村上豪, 三澤浩昭

    第15回 宇宙科学シンポジウム　2015/01/06

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    本学学生

  279. JUICE-JAPAN WG 木星氷衛星探査計画 ― Radio & Plasma Wave Investigation (RPWI) : Contribution plan from Japan

    笠羽康正, 三澤浩昭, 土屋史紀, 笠原禎也, 井町智彦, 木村智樹, 加藤雄人, 熊本篤志, 小嶋浩嗣, 八木谷聡, 石坂圭吾, 三好由純, RPWI Japan

    第15回 宇宙科学シンポジウム　2015/01/06

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    その他

  280. HF-UHF帯における惑星電波観測

    土屋史紀, 三澤浩昭, 熊本篤志

    宇宙・電磁環境研究センター研究集会　2014/12/26

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    その他

  281. Sub-relativistic and relativistic electron precipitations above diffuse aurora: Conjugate observations of SAMPEX and the all sky TV camera at Syowa Station International-presentation

    Kurita, S, Kadokura, A, Miyoshi, Y, Sato, Y, Misawa, H, Morioka, A

    American Geophysical Union, Fall Meeting 2014　2014/12/15

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    その他

  282. Signature of subionospheric LF wave perturbations associated by Hokuriku winter lightning.

    Yosuke Morinaga, Fuminori Tsuchiya, Takahiro Obara, Hiroaki Misawa, Noriyasu Honma, Mitsuteru SATO

    第136回地球電磁気・地球惑星圏学会講演会　2014/10/31

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    本学学生

  283. AMATERASによって観測された太陽電波IV型バースト中のzebra patternの出現特性

    金田 和鷹, 三澤 浩昭, 土屋 史紀, 小原 隆博, 岩井 一正

    第136回地球電磁気・地球惑星圏学会講演会　2014/10/31

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    本学学生

  284. AMATERASで観測された太陽電波II型バーストのスペクトル微細構造の統計解析

    柏木 啓良, 三澤 浩昭, 土屋 史紀, 小原 隆博, 岩井 一正

    第136回地球電磁気・地球惑星圏学会講演会　2014/10/31

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    本学学生

  285. HF～VHF帯太陽電波新観測装置の開発

    三澤 浩昭, 小原 隆博, 岩井 一正, 土屋 史紀

    第136回地球電磁気・地球惑星圏学会講演会　2014/10/31

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    本人

  286. 木星磁気圏ダイナミクスに関する研究-III

    水口 岳宏, 三澤 浩昭, 土屋 史紀, 小原 隆博, 笠原 慧

    第136回地球電磁気・地球惑星圏学会講演会　2014/10/31

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    本学学生

  287. The Radio & Plasma Wave Investigation (RPWI) for JUICE

    Yasumasa Kasaba, Hiroaki Misawa, Fuminori Tsuchiya, Yoshiya Kasahara, Tomohiko Imachi, Tomoki Kimura, Yuto Katoh, Atsushi Kumamoto, Hirotsugu Kojima, Satoshi Yagitani, Keigo Ishisaka, Yoshizumi Miyoshi

    第136回地球電磁気・地球惑星圏学会講演会　2014/10/31

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    その他

  288. 木星電離圏アルフベン共鳴モデル検証のための木星デカメータ電波Sバーストの統計解析

    熊本 篤志, 佐々木 悠朝, 加藤 雄人, 三澤 浩昭

    第136回地球電磁気・地球惑星圏学会講演会　2014/10/31

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    その他

  289. Development of database of ground-based observation network of Tohoku University

    八木 学, 小原 隆博, 鍵谷 将人, 米田 瑞生, 熊本 篤志, 三澤 浩昭, 土屋 史紀, 岩井 一正, 寺田 直樹, 大矢 浩代

    第136回地球電磁気・地球惑星圏学会講演会　2014/10/31

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    その他

  290. 電波干渉計及びひさき衛星を用いた木星放射線帯空間変動現象の考察

    北 元, 土屋 史紀, 村上 豪, 三澤 浩昭

    第136回地球電磁気・地球惑星圏学会講演会　2014/10/31

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    本学学生

  291. Variation characteristics of Jupiter's hectometric radiation during the HISAKI observation campaign

    Hiroaki Misawa, Fuminori Tsuchiya, Tomoki Kimura, Atsushi Kumamoto

    第136回地球電磁気・地球惑星圏学会講演会　2014/10/31

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    本人

  292. HisakiによるEUV強度及び地上観測による木星デカメータ電波の比較解析

    熊本 篤志, 三澤 浩昭, 土屋 史紀, 木村 智樹

    第136回地球電磁気・地球惑星圏学会講演会　2014/10/31

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    その他

  293. 東北大学 HF 〜 VHF 帯太陽電波観測

    三澤浩昭, 小原隆博, 岩井一正, 土屋史紀

    日本天文学会2014年秋季年会　2014/09/11

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    本人

  294. AMATERASによって観測された太陽電波IV型バースト中のzebra pattern

    金田和鷹, 三澤浩昭, 土屋史紀, 小原隆博, 岩井一正

    日本天文学会2014年秋季年会　2014/09/11

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    本学学生

  295. AMATERAS で観測された太陽電波 II 型バーストにおけるスペクトル微

    柏木啓良, 三澤浩昭, 土屋史紀, 小原隆博, 岩井一正

    日本天文学会2014年秋季年会　2014/09/11

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    本学学生

  296. Relativistic Electron Precipitation in Association with Diffuse Aurora: Conjugate Observation of SAMPEX and the All Sky TV Camera at Syowa Station International-presentation

    Satoshi KURITA, Akira KADOKURA, Yoshizumi MIYOSHI, Yuka SATO, Hiroaki MISAWA, Akira MORIOKA

    Asia Oceania Geosciences Society 11th Annual Meeting　2014/07/28

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    その他

  297. Fine Spectral Structures of a Solar RadioType-II Burst Observed with AMATERAS International-presentation

    Shintaro SATO, Hiroaki MISAWA, Fuminori TSUCHIYA, Takahiro OBARA, Kazumasa IWAI, Satoshi MASUDA, Yoshizumi MIYOSHI

    Asia Oceania Geosciences Society 11th Annual Meeting　2014/07/28

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    本学学生

  298. 木星磁気圏ダイナミクスに関する研究-II：内部磁気圏へのエネルギー輸送過程の解明

    水口 岳宏, 三澤 浩昭, 土屋 史紀, 小原 隆博, 笠原 慧

    日本地球惑星科学連合2014年大会　2014/04/28

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    本学学生

  299. 2014年1月に行われた木星熱圏・放射線帯観測の初期解析結果

    北 元, 三澤 浩昭, 土屋 史紀, 藤澤 翔太, 坂野井 健, 笠羽 康正

    日本地球惑星科学連合2014年大会　2014/04/28

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    本学学生

  300. EISCAT 3Dによる惑星非熱的電波観測

    土屋 史紀, 三澤 浩昭

    日本地球惑星科学連合2014年大会　2014/04/28

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    その他

  301. 磁気嵐・サブストーム時の高エネルギー電子降下現象：オーロラサブオーロラ域におけるVLF/LF電波伝搬観測

    土屋 史紀, 小原 隆博, 森岡 昭, 三澤 浩昭, 八木 学, 三好 由純, 塩川 和夫, 小川 泰信, コナーズ マーチン

    日本地球惑星科学連合2014年大会　2014/04/28

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    その他

  302. マイクロType-III電波と外部コロナ域

    森岡 昭, 三好 由純, 笠羽 康正, 増田 智, 岩井 一正, 三澤 浩昭

    日本地球惑星科学連合2014年大会　2014/04/28

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    その他

  303. AMATERASによって観測された太陽電波IV型バースト中のzebra pattern の出現特性

    金田 和鷹, 三澤 浩昭, 土屋 史紀, 小原 隆博, 岩井 一正

    日本地球惑星科学連合2014年大会　2014/04/28

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    本学学生

  304. AMATERASで観測された太陽電波バーストのスペクトル微細構造とその生成機構

    岩井 一正, 三好 由純, 増田 智, 土屋 史紀, 森岡 昭, 三澤 浩昭

    日本地球惑星科学連合2014年大会　2014/04/28

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    その他

  305. 東北大学太陽電波望遠鏡AMATERASで観測された狭帯域太陽電波Type-IVバーストとその生成機構

    加藤 雄人, 岩井 一正, 西村 由紀夫, 熊本 篤志, 三澤 浩昭, 土屋 史紀, 小野 高幸

    日本地球惑星科学連合2014年大会　2014/04/28

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    その他

  306. ディフューズオーロラに伴う相対論的電子降り込み

    栗田 怜, 門倉 昭, 三好 由純, 佐藤 由佳, 三澤 浩昭, 森岡 昭

    日本地球惑星科学連合2014年大会　2014/04/28

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    その他

  307. サブストームオンセット過程

    森岡 昭, 三好 由純, 笠羽 康正, 佐藤 夏雄, 門倉 昭, 三澤 浩昭, 宮下 幸長

    日本地球惑星科学連合2014年大会　2014/04/28

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    その他

  308. AMATERASによって観測された太陽電波II型バースト中のスペクトル微細構造

    佐藤 伸太郎, 三澤 浩昭, 土屋 史紀, 小原 隆博, 岩井 一正, 増田 智, 三好 由純

    日本地球惑星科学連合2014年大会　2014/04/28

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    本学学生

  309. 木星オーロラ電波の長期変動特性 - II

    三澤 浩昭, 米田 瑞生, 森岡 昭, 土屋 史紀, 水口 岳宏

    日本地球惑星科学連合2014年大会　2014/04/28

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    本人

  310. Solar wind variability and Jupiter's magnetosphere viewed from the auroralradio emissions International-presentation

    International CAWSES-II Symposium　2013/11/18

  311. Investigation on rapid variations of Jupiter’s radiation belt International-presentation

    AOGS - AGU(WPGM) 2012　2012/08/13

  312. Investigation on rapid variations of Jupiter’s magnetosphere International-presentation

    Seminar on lunar and planetary geodesy　2012/06/19

  313. Variation characteristics of Jupiter’s radiation belt viewed from ground-based observations International-presentation

    ERG, SCOPE and Beyond　2009/11/02

  314. Simultaneous Interferometer and multi-frequency survey of Jupiter's synchrotron radiation International-presentation

    K. IMAI, A. BHARDWAJ, F. TSUCHIYA, T. KONDO, A. MORIOKA

    AOGS 2008　2008/06

  315. Newly developed meter to decimeter wave range radio telescopes for the investigations of planetary environments International-presentation

    Asia Pacific Radio Science Conference　2001/08/01

Show all Show first 5

Research Projects 27

  1. 太陽高エネルギー粒子加速過程の研究 Competitive

    System: The Other Research Programs

    2011/04 - Present

  2. Studies on Planetary Plasma and Atmosphere Competitive

    1997/04 - Present

  3. Studies on Planetary Radiation Belt Competitive

    1994/07 - Present

  4. Studies on Planetay Nonthermal Radiation Competitive

    1985/06 - Present

  5. 中性子星の磁気圏物理から迫る Repeating FRB の解明

    木坂 将大, 本間 希樹, 榎戸 輝揚, 新納 悠, 村田 泰宏, 三澤 浩昭, 米倉 覚則

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(B)

    Institution: 広島大学

    2022/04/01 - 2026/03/31

  6. 中性子星種族の多様性とそれを作り出す中性子星磁気圏の多様性・変動性の起源の解明

    柴田 晋平, 木坂 将大, 榎戸 輝揚, 寺澤 敏夫, 三澤 浩昭

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(B)

    Institution: 山形大学

    2018/04/01 - 2022/03/31

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    本研究では、NICERによるX線観測及び電波観測と理論計算により、どのようなパラメータの中性子星にどのような多重極磁場・トロイダル磁場が 発生し進化していくかという種族の多様性の仕組みを解明することを目指す。(1)パルサーのポーラーキャップにおける電子陽電子対雪崩のシュミレーター開発(1次元)を行った。特に、シンクロトロン放射だけでなく共鳴コンプトン散乱によって作られた光子も計算した。パルサーからの非熱的なX線は共鳴コンプトン散乱でほぼ説明可能であることがわかった。(2)本研究遂行途中に新しい発見があった。磁気圏電流による中性子星のスピンダウントルクの働き方に関する従来の理論が適切でないことがわかった(この点を指摘した論文を発表予定)。(3)X-ray観測についてはNICERのスペクトル解析を休止し、時間変動の解析を先行して進めた。マグネター、回転駆動型パルサーの両方に定常放射と思われていたものが実は時間変動性(非ポアッソン性)を持っているとの兆候を見つけた。結果は、山形大学理工学研究科修士論文(勝海文音)として発表した。 (４)2017-2019年に15回にわたって行われた電波・Ｘ線によるCrabパルサー同時観測の電波データベースを作成し、相関解析に供した。(5)国際宇宙ステーションに搭載されている NICER 望遠鏡と日本国内の電波望遠鏡でのかにパルサーの同時観測を行い、巨大電波パルスに同期したＸ線の増光を発見した。サイエンス誌に投稿して受理された(出版は2021年度)。また、突発的に明るくなるマグネターの NICER による追跡観測 (SWift J1818.0-1607 など)の研究も行った。(7)かにパルサーの巨大電波パルスと同時に発生するX線の増光を説明する理論モデルを構築し、巨大電波パルスが起こる環境に対する制限を与えた。

  7. Study of extremely short term variations of Jupiter's radiation belt

    Misawa Hiroaki, MIZUGUCHI Takahiro, SEKIDO Mamoru, KAWAI Eiji, KITA Hajime

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2016/04/01 - 2019/03/31

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    It is known from ground based observations of their synchrotron radiations that there are quasi-periodic 'extremely short term variations (hereafter ESTV)' of high energy electrons in Jupiter's radiation, whose intensity change is up to several-ten percent within one day and periodicity is generally a few to several days. This study has been performed to reveal unknown processes of ESTV based on observations of Jupiter's synchrotron radiation and analyses of scientific satellite and spacecraft data. As the result, it is shown that ESTV well correlate with magnetic reconnection events occur in Jupiter's outer magnetosphere. This fact suggests that global reconfiguration of Jupiter's magnetosphere affect deep inner region and rapid increase of high energy electrons.

  8. Study of turbulent plasma structure of the Crab pulsar by detailed radio pulse observations

    Toshio Terasawa, TSUCHIYA FUMINORI, SEKIDO MAMORU, TAKEFUJI KAZUHIRO, TAKEUCHI HIROSHI, KAMEYA OSAMU

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    2015/04/01 - 2019/03/31

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    Toward the understanding of physical status of neutron stars, we conducted pulsar observations with multiple radio telescopes available in Japan, and succeeded in discovery of giant radio pulses (GRP) of the Crab pulsar which had wide frequency coverages from 300MHz to 8GHz, as well as detection of a few % X-ray pulse intensity increases concurrent with GRP. In addition, we succeeded follow-up observations of the Crab pulsar's lagest-ever glitch (a rapid jump in rotation frequency|) and an outburst of XTEJ1810-197, a neutron star having ultra-strong magnetic field, both of which occurred during the term of this research budget.

  9. Understanding of Jovian atmosphere-ionosphere-magnetosphere coupling process based on optical and radio telescopes from ground and space

    Sakanoi Takeshi, YONEDA Mizuki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2014/04/01 - 2017/03/31

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    The purpose of this study is to clarify the atmosphere-magnetosphere coupling in Jupiter using continuous monitoring data of planetary atmosphere and plasma phenomena obtained with our observation facilities at the summit of Haleakala, Hawaii (altitude 3000 m). In the summer of 2014, the Tohoku University 60 cm telescope was relocated to Haleakala, and we started continuous observation of Io’s sulfur ion torus emission at 673 nm with a visible high-resolution spectrograph. Furthermore, we carried out simultaneous observation of Io’s torus emission and Jupiter’s aurora in the ultra-violet range with a planetary space telescope Hisaki/EXCEED, and examined the causal relationship between the Io torus dynamics and the Jupiter auroral activity associated with the activation of Io’s volcano particularly for the events occurred in January 2015. In addition, we performed the precise observation of Jupiter infrared aurora using the Subaru telescope and NASA/IRTF every year.

  10. Radio wave propagation and diffraction in relativistic pulsar winds

    Terasawa Toshio, ASANO Katsuaki, SEKIDO Mamoru, TAKEFUJI Kazuhiro, TAKEUCHI Hiroshi, KAMEYA Osamu, MISAWA Hiroaki, SHIBATA Shimpei, TANAKA Yasuyuki, MIKAMI Ryo, KISAKA Shota, TANAKA Shuta

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: The University of Tokyo

    2012/04/01 - 2016/03/31

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    One of the most famous neutron stars, the Crab pulsar, emits enigmatic giant radio pulses (GRP) which are more than several thousands stronger than normal radio pulses. In this reseach project, we study the GRP phenomenon both observationally and theoretically. Observationally, we have obtained the world's first example of wide-frequency GRPs extending from 325MHz to 8GHz. Further, from the statistical study of many GRP observed below 2.3GHz, we discovered that about the half of GRP follows single power law frequency spectrum. Theoretically, we have quantitatively shown that transfer of wave energy toward the lower frequency region occurs via induced-Compoton scattering process along with the propagation of high-intensity radio waves, such as GRP.

  11. Magnetic reconnection at Jupiter as observed from Hawaiian high-altitude facilities at solar maximum

    SATOH Takehiko, FUJIMOTO Masaki, KAGITANI Masato, MISAWA Hiroaki, TOKUMARU Munetoshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Japan Aerospace Exploration Agency

    2012/04/01 - 2015/03/31

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    In conjunction with the solar maximum, attempts were made to monitor Jupiter's infrared auroral activities from high-altitude observing facilities in Hawaii. Jupiter's rotational axis was most tilted from the normal to ecliptic plane at this time period. In such conditions, the IMF (mostly in the ecliptic plane) can be felt by the planet as northwar or southward magnetic fields, resulting in possible enhancement of magnetic reconnections. In the first half of the period, we tried to use a telescope atop Mauna Kea (Hawaii Island), and later half a telescope atop Haleakara (Maui Island). Due to troubles with the telescopes, Jupiter's aurora was not observed. Instead, we successfully obtained Jupiter and its satellite Io data (for monitoring volcanism on Io) in shorter infrared wavelengths. The emissions from Venus' nightside disk were also observed. These will reinforce future collaborations between space missions and high-altitude observing facilities.

  12. Investigations of origin of Mercury's exospheric atmosphere based on the optical observations with high spatial resolution at optimum observation sites

    MISAWA Hiroaki, OKANO Shoichi, TSUCHIYA Fuminori, NOZAWA Hiromasa

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2008 - 2010

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    In order to investigate origin of unknown Mercury's exospheric atmosphere, ground-based optical observations have been made for Mercury's sodium atmosphere with high spatial resolution at optimum observations sites, the island of Maui, Hawaii and Alice Springs, Australia. Generation processes of Mercury's exospheric atmosphere have been examined by comparing the observation results with modeled atmospheres which have been calculated using the numerical simulation code originally developed by Tohoku University.

  13. Searching for an evidence of magnetic reconnection in Jupiter's Magnetosphere from the high-altitude observatory in Hawaii

    SATOH Takehiko, FUJIMOTO Masaki, SAKANOI Takeshi, OKANO Shoichi, MISAWA Hiroaki, TOKUMARU Munetoshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Japan Aerospace Exploration Agency

    2008 - 2010

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    It is NOT well known how Jupiter's magnetosphere interacts with the solar wind and how magnetic reconnection works. Our plan was to carry out continuous monitoring observations in the infrared atop Mauna Kea, so that the evidence of magnetic reconnection at Jupiter is detected for the first time. We have developed an infrared camera, with a PtSi detector, and exchanged a Memorandum of Understandings with the University of Hawaii, Hilo. Although the data acquisition was delayed, due to a large delay of the telescope installation, our system development has been successfully completed so that the monitoring observations in coming years are in hand.

  14. Study of Jupiter's Radio Source by Using e-VLBI Global Network toward the Moon-Earth Baseline Jupiter Radio VLBI

    IMAI Kazumasa, KONDO Tetsuro, MISAWA Hiroaki, TSUCHIYA Fuminori, NAKAJO Tomoyuki, KAWANO Nobuyuki, NODA Hirotomo, IWATA Takahiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Kochi National College of Technology

    2007 - 2009

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    The radiation mechanism of the Jupiter's decametric radio emissions has not been fully understood. We developed a Jupiter radio e-VLBI system over the Internet. We successfully received Jupiter radio emissions by using this e-VLBI system. The micro structures of Jupiter radio source are also considered by the model of Jupiter radio searchlight beam. This study is very important step toward the moon-earth baseline VLBI to investigate the Jupiter radio source in detail.

  15. A study of global dynamics of Jupiter's magnetosphere based on continuous optical observations of the Iogenic plasma

    HIROAKI Misawa, OKANO Shoichi, TSUCHIYA Fuminori, NOZAWA Hiromasa

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2006 - 2008

  16. Studies on acceleration processes of Iogenic gas and plasma based on stational observations at a suitable site for optical observations

    MISAWA Hiroaki, OKANO Shoichi, SAKANOI Takeshi, TSUCHIYA Fuminori, YAMAZAKI Atsushi, SATOH Takehiko

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2005 - 2007

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    The main purposes of this study are the followings: 1) How the gases originated from Jupiter's satellite Io, which are considered to be main plasma source of Jupiter's magnetosphere, are generated and released from Io, 2) how the Iogenic plasma is accelerated to nearly corotation speed, and 3) how the Iogenic plasma is thermalized from the cold state just after the gas is generated to the hot state as known from ground based observations and planetary explorers. In order to investigate them, regular optical observations for the Iogenic gas and plasma had been carried out about one month a year at Mt. Haleakara, Maui, Hawaii which is one of the best optical observation sites in the world. And, numerical simulations had been made for the three scientific subjects, respectively. 1. Results of the observations: 1) These is always an east-west asymmetry of the Iogenic sodium gas which is distributed beyond several tens Jovian radii (sodium nebula). 2) The plasma speed near Io's orbit is always slower than the corotation speed, and the speed shows magnetic longitude dependence and dawn-dusk asymmetry. 3) Plasma temperatures near Io's orbit is derived for the parallel and perpendicular directions with respect to Jupiter's local magnetic field. 2. Results of the numerical simulations: 1) The dominant release process of the Iogenic gas (sodium nebula) would be dissociation or dissociative recombination of the Iogenic plasma, and the amount of the released gas would be largest/smallest when Io is in the dawn/dusk sides. 2) A current circuit would be made between the plasma near the Io orbit and Jupiter's ionosphere which has longitudinal asymmetry in the conductivity due to the local time dependence of the solar UV irradiation, and quasi-uniform longitudinal currents would make the observed accelerated plasma flow which is slower than the corotation speed with the dawn-dusk asymmetry. 3) Iion-cyclotron waves would be generated in the just ionized Iogenic plasma due to a plasma instability induced by the "ring distribution", and the waves might make the observed thermal conditions by thermalizing the plasma through the wave-particle interaction (pitch angel scattering).

  17. 地球にダストプラズマリング?-可能性とその実証観測-

    森岡 昭, 大家 寛, 岡野 章一, 三澤 浩昭, 飯島 雅英, 土屋 史紀

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 萌芽研究

    Institution: 東北大学

    2003 - 2005

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    本研究では、放射線帯内帯の高エネルギー電子の「ダンベル分布」を理解することに端を発して、大胆な仮説、「地球の周辺には未発見のダストプラズマリングが存在する」、を提唱し、その検証を理論と観測から試みる研究を行っている。 1.チリ・アタカマ砂漠における地球ダスト散乱光成分検出観測データの解析 ダストの光学観測(観測サイト:チリ・アタカマ砂漠,期間:2003年7月27日より8月1日,対象:日没直後、日出直前の天の赤道方向の黄道光)データから、微弱な地球ダスト光を検出する解析が進められた.詳細な解析の結果,現在のところ,一様帯状に広がる黄道光の中から、磁気赤道に沿って含まれているであろう地球ダスト微弱光の空間分布は検出されていない.この結果をもとに黄道光可視域地上観測では光量が不足することから今後の研究方針が検討され,人工衛星による赤外域の黄道光観測データ(米国COBE衛星,目本あかり衛星)の解析が有望であるとの結論が得られた。 2.惑星における微粒子散逸・分布過程の研究 木星の衛星イオから放出される火山性ガスが木星の磁気圏に分布していく様相は,本研究がもくろむ地球ダストリングの検出にきわめて有用な情報をもたらす.イオ衛星を起源とするナトリウム分子の散逸過程が観測とシミュレーションによる解析から究明された.これらの結果は,今後の地球ダストリング検出の研究に応用される.

  18. Studies on production processes of exospheric atmospheres of Mercury and Io based on development of a spectro-imager

    MISAWA Hiroaki, MORIOKA Akira, OKANO Shoichi, TSUCHIYA Fuminori

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2003 - 2005

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    1. Development of a 2D spectro-imaging system for exospheric atmospheres A spectro-imaging system for detection of sodium emissions of exospheric atmospheres of planets and satellites is developed. The system consists of 1)a dimension converting optics made of an optical fiber bundle, and 2)a F-number adjusting optics to connect the dimension converting optics to light-entrance and exit optics. The optical fiber bundle is arranged in 12x12(entrance) and 144x1(exit). The system is set up on an optical bench and connected to the 60cm diameter coude telescope (entrance side) and high-resolution grating spectrometer (exit side) of Tohoku University. A spectrum datum is projected onto a Li-N2 cooled CCD camera and reconstructed to a spectro-image on a computer. 2. Observations of exospheric atmospheres of Io and Mercury Observations of exospheric atmospheres of Io, one of the Galilean satellites, and Mercury have been made using the spectro-imaging system. It has been suggested that production rate of Io's atmosphere depends on Io's phase angel (Io's apparent position with respect to Jupiter). In order to confirm the dependence, we have made observations of Io for various Io's phase angles and obtained significant data-sets. On the other hand, Mercury observations have been made intensively for the period when Mercury is viewed largely apart from the sun. Due to bad weather condition in main, reliable images for investigating gas production processes have not been sufficiently acquired in the research period. We plan to make follow-up observations after June, 2006 when Mercury is viewed most largely apart from the sun in 2006. 3. Numerical simulation for investigating gas production processes A Monte-Carlo simulation model has been developed and adopted for the investigations of gas production processes. As the result for Mercury's atmosphere, it is suggested that ion sputtering by solar wind protons is operated further more effectively than previously predicted on Mercury's surface to product the atmosphere. As for Io's atmosphere, it is inferred that the amount of the atmosphere might be controlled by the coupling process of sputtering and/or peering by Jupiter's magnetospheric plasma and the photon stimulated desorption by the sunlight.

  19. STUDY ON IONIZATION PROCESS OF VOLCANIC GAS ORIGINATED FROM JOVIAN SATELLITE IO BASSED ON OPTICAL OBSERVATION AT HALEAKALA

    OKANO Shoichi, MORIOKA Akira, MISAWA Hiroaki, SAKANOI Takeshi, TSUCHIA Fuminori, SATOH Takehiko

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2002 - 2004

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    Optical observations in this research were carried out at Haleakal High Altitude Observatory annually in February and March every year when Jupiter was close to its opposition. Observation of sulfur ion emission in the Io plasma torus was preliminary tried using a combination of 28cm Schmidt-Cassegrain telescope and a cooled CCD camera equipped with an interference filter in fiscal year of 2002. In fiscal year of 2003, observation was carried out using a newly developed Fabry-Perot imager with wavelength resolving power of 60,000, which was connected to a 35cm Schmidt-Cassegrain telescope. Same observation was continued also in fiscal year of 2004. By using a Fabry-Perot imager, it became possible to make Doppler resolved observation. This allowed us to obtain 2-dimensional distributions of intensity of sulfur ion emission, bulk velocity of sulfur ions in the plasma torus and its deviation from corotation of Jovian magnetic field, and ion temperatures both parallel and perpendicular to the magnetic field line. As for sodium emission, observations of sodium nebula extending by 400 Jovian radii from Jupiter were carried out using a wide field imaging instrument with a field of view of 5.7 degree in each year. In addition to these observations, in fiscal year of 2004, observation of distribution of sodium emission in close proximity of lo was made using a Fabry-Perot imager coupled to a 3.7m AEOS telescope equipped with an adaptive optics system. This observation allowed us to obtain asymmetric distribution of sodium atoms close to Io.

  20. Studies of release and loss processes of Mercury's atmosphere investigated with ground based optical observations

    MISAWA Hiroaki, TSUCHIYA Fuminori, MORIOKA Akira

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2001 - 2002

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    1) Development of the 2D imaging system for Mercury's atmospheric The 2D imaging system for detection of the atmospheric weak emission layer surrounding Mercury is successfully developed based on the corona-graph technique. The observation wave length is set at the emissions of Na-D lines. The contrast between a weak emission surrounding a bright emission region (observation object) and the bright region is achieved to be 1:1000. 2) Observations of Mercury's atmosphere: current status The observations were made for Dec. 2001 and April 2002. Due to a hard atmospheric smearing effect caused by a seasonal wind and low altitude of Mercury, reliable images have not been acquired successfully for the periods. However, we could establish observation and analysis methods which are required to derive 2D image of the weak emission layer of Mercury's atmosphere. 3) Monte-Carlo simulation analysis for Mercury's atmosphere A Monte-Carlo simulation analysis for neutral and ionized particles has been made to investigate generation processes of Mercury's extended atmosphere, which is observed as the weak emission layer. As the result, it is suggested that plausible processes of the extended atmosphere are ion-sputtering or/and meteoritic vaporization, and the quantitative 2D imaging for the weak emission layer is quite important to determine the proper gas release process.

  21. Acceleration and dynamics of energetic particles in the Jovian magnetosphere

    MORIOKA Akira, TSUCHIYA Fuminori, MISAWA Hiroaki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2000 - 2001

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    To study the acceleration and dynamics of energetic particles in the Jovian magnetosphere, the development of the observation system for Jovian synchrotron radiation was performed. (1) After the improvement and adjustment of the observation system, the performance experiments was carried out. And the system has been established. (2) The software for the automatic operation, including the phase and gain calibration was successfully completed, which are essential to detect the absolute intensity of the Jovian synchrotron radiation for a long term. (3) The simultaneous observations of the Jovian synchrotron radiation at Kiso and Fuji observatories, Nagoya University, using the 327 MHz radio telescopes were carried out, and detected the daily variation of the radiation. (4) From the analyzes of the energetic particle data provided from NASA database, the response of the Jovian magnetopause for the solar wind variation and particle boundary in the Jovian magnetosphere were derived. (5) The data analyzes of the Ulysses spacecraft, the periodic modulation of Jovian energetic electrons with the period of about 40 min was discovered in interplanetary space (6) The dynamics of the earth's radiation belts was studied as the counter part of the Jovian radiation belt. From the detailed investigation of energetic electrons, unexpected pitch angle distributions in the equatorial region in the inner magnetosphere were discovered, which is strongly related to the intense plasma waves called EPWAT (equatorial plasma wave turbulence). (7) The dynamics of the outer radiation belt associated with magnetic storms was studied, and proposed the mechanism to accelerate hot electrons to relativistic energies through the interaction with the storm time whistler mode waves.

  22. Serial optical observation of Jovian plasma processes at the summit of Mauna Kea in Hawaii

    MORIOKA Akira, SAKANOI Takeshi, MISAWA Hiroaki, OKANO Shoichi, SATOH Takehiko, TSUCHIYA Fuminori

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B).

    Institution: Tohoku University

    1999 - 2000

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    The study, 2-dimensional imaging observations of the D-line emission distribution of logenic sodium atoms, which is regarded as a tracer of logenic volcanic gases, were performed with two field of views (FOV), namely±20Rj (narrow FOV ; Rj : Jovian radius), and ±400Rj (wide FOV). From the observational results, the following characteristics of emission distribution were obtained. In the narrow FOV observation, two different types of distribution extending to〜20Rj, that is, the band-shaped distribution and the spray-shaped distribution, were observed simultaneously. In the wide FOV observation, the elongated oval-like emission distribution extended to as much as 400Rj along the equatorial plane was observed. The east-west intensity asymmetry was also observed, with a dependence on the Io phase angle. Based on the observed images , we then made model analyses to investigate supply processes of sodium atoms and time variation of sodium distribution, and presented the comprehensive source process which can consistently reproduce the observed characteristics both in the narrow and wide FOV observation. From the model analysis for the narrow FOV observational results, it is concluded that the band-shaped distribution is attributed to the molecular ion destruction process, and the typical gyrovelocity of the molecular ions is estimated to be 20km/sec. It is also concluded that the spray-shaped distribution is produced through the charge exchange process. Then a combination of the two processes was examined for the wide FOV observational results. The combined model analysis could fairly reproduce the observed features of the wide extended sodium distribution. In the course of the model analysis, some important physical processes and related parameters are suggested.

  23. Studies on dynamical processes among Mercury's atmosphere, magnetosphere and the solar wind based on 2D imaging observations for Mercury's atmospheric emissions

    MISAWA Hiroaki, TAGUCHI Makoto, MORIOKA Akira

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    1999 - 2000

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    1) Development of the 2D imaging system for atmospheric emission of Mercury The 2D imaging system for detection of Na-D line emission of Mercury's atmosphere is successfully developed. The back-end of the system consists of temperature and tilt-angle controlled interference filter and electrically cooled 2D CCD camera. The band-width of the filter is only 0.13nm (FWHM) for reducing the contamination caused by continuum emissions from the day-side area of Mercury. The temperature control function is used for adjusting the center wavelength of the filter against changes in ambient temperature, while the tilt-angle control function is used for changing the center wavelength in a short time to observe both a Na-D line image and back-ground emission image as a reference. The back-end is attached to the 60cm φ F/24 coude telescope system of Tohoku University. 2) Observations of Na-D line emission of Mercury's atmosphere The observations were made from Nov. to Dec. 2000. Due to small solar elongation of Mercury, the observations were made in the twilight period at low elevation angle. The trackingg error of the telescope system was therefore inevitably large. The error has not been fully compensated during this research period, then, reliable images have not been acquired successfully. However, we have established analysis methods which are required to derive 2D image of Mercury's atmosphere ; i.e., the compensation method for atmospheric smearing and the reduction method of back-ground emission. 3) Development of Monte-Carlo simulation model for Mercury's atmosphere A Monte-Carlo simulation model for neutral and ionized particles has been developed under the consideration of gravity forces of Mercury and the sun and the presence of magnetic field of Mercury. Three main gas release processes are taken into account in the model ; photon-stimulated desorption, ion sputtering and meteoritic vaporization. Although quantitative investigations of dynamical processes among Mercury's atmosphere, magnetosphere and the solar wind are deferred for future studies due to lack of reliable data, a significant model has been established in this research.

  24. Study on Jupiter's inner magnetosphere by the observation of Jovian synchrotron radiation

    MORIOKA Akira, KOJIMA Masayoshi, MISAWA Hiroaki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: TOHOKU UNIVERSITY

    1997 - 1999

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    1. The receiving system for the observation of Jupiter's synchrotron radiation has been developed. The developed pre-amplifier satisfies the demands of the minimum detection sensitivity of 0.1 Junsky and receiver noise temperature of 75 K. 2. The calibration system for the receiver, which is necessary to detect the accurate intensity of Jupiter's radiation, has been developed and completed. The phase and gain of the receiving system becomes to be calibrated using the loop method. The achieved compensation of the relative phase difference was less than 5.6, and relative gain was less than 0.2 dB. 3. The developed receiving and calibration system was connected to the large antenna system, and the performance test was carried out. It was confirmed that both the antenna beam width and receiving sensitivity satisfy the expected performance. The distribution map of the Galactic radio waves at a frequency of 327 MHz was successfully produces. 4. The simultaneous intensity variation of Jupiter's synchrotron radiation has detected using the radio telescopes of Kiso and Fuji Observatories, Nagoya University. 5. Detailed observations of Jovian synchrotron radiation was carried out using the 34 m large dish antenna. It was shown that the relativistic electrons were highly anisotropy during the radiation was enhanced. The correlation between the radiation and the solar 10.7 flux was also detected. A model simulation suggested that the observed radio flux enhancement was caused by the enhanced radial diffusion due to the intense solar UV/EUV event which heated the Jupiter's upper atmosphere. 6. Variations of energetic electrons released from the Jovian magnetosphere are investigated by using data from three spacecraft. Analyses confirmed that the Jovian electrons are modulated by the dynamic pressure of the solar wind at the position of Jupiter. It is also found that the release rate of energetic electrons is controlled by the polarity of IMF.

  25. Studies on the Distribution of Sources of Jovian Magnetospheric Plasma Originated from Io Based on Optical Observations

    MISAWA Hiroaki, ARUGA Tadashi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    1996 - 1997

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    1.Developement of the Optical Observation System of Volcanic Gases Originated from Io The observation system consists of a 28cm diameter relfecting telescope, interference filters, and an electric-cooling CCD camara. The detectable emission intensity of the system is less than 10 Rayleighs, which is effective enough to detect the volcanic gas emissions. The system has made possible to detect 2D distribution of neutral sodium (NaI) and ionized sulfer (SII) gases with the view area up to nearly 40 Jovian radii with a CCD imaging. 2.Observations The observations of volcanic gas emissions have been made at Mt.Zao, Miyagi, and at Alice Springs, Australia. The observation using the 91cm diameter reflecting telescope of the National Astronomical Observatory at Okayama, has been carried out temporaraily to make the observation with higher spatial resolution. In particular, in Australia, the observations have been successfully made almost every night during nearly two weeks. The data of temporal and spatial variations of the volcanic gases have been acquired through this unprecedented successive observation. 3.Observation Results A north-south asymmetry of spatial distribution of NaI gas has been detected at a distant area out of 20 Jovian radii from Jupiter. As the result of the simulations of gas release process based on the observation result, it is concluded that the asymmetry cannot be interpreted by the gas release process caused by the charge exchange of isotropically distributed plasma which has been proposed in previous researches. It is confirmed for SII gas of the Io plasma torus that the emission intensity has varied at a foctor of three in the time scale of days to a week. These results are important for revealing little known gas release process and characteristic variations of the volcanic gases as the main source of Jovian magnetospheric plasma.

  26. Study on the three dimensional solar wind structure using computer assisted tomography analysis

    KOJIMA Masayoshi, MISAWA Hiroaki, SAKURAI Takayuki, ASAI Kikuo, TOKUMARU Munetoshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: NAGOYA UNIVERSITY

    1995 - 1997

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    Spacecraft observations of the solar wind have been confined to regions near the ecliptic plane except only one spacecraft of Ulysses, and there has been no direct measurement at solar distances inside 70 Rs where the solar wind is significantly accelerated. An interplanetary scintillation (IPS) method is a unique and useful means to measure global structure of the solar wind in regions near the Sun and at high latitudes where in situ measurements are difficult. However the IPS measurements are biased by a line-of-sight integration through a three-dimensional structured solar wind. So we have developed a method which uses a computer assisted tomography (CAT) technique to obtain unbiased longitudinal and latitudinal distributions of a speed and electron density fluctuations. The CAT analyzes have retrieved not only unbiased solar wind parameters but also high spacial resolution ; 1. Fractional Electron Density Fluctuations We found that the fractional electron density fluctuation level DELTAN/N in the high-speed wind grows with a heliocentric distance and becomes larger than that in the low-speed wind at distances beyond 0.3 AU ; 2. Latitudinal Structure The latitudinal solar wind speed structure in the solar activity minimum phase has a bimodal structure which consists of low-speed and high-speed regions separated with a sharp velocity gradient ; 3. Radial distance dependence of velocity Comparing two velocity distribution maps made at 0.1-0.3 AUand 0.3-IAU,we found that the high-speed wind is accelerated to its final speed within 0.1 AU and that the high-speed Wind increases its velocity slightly as approaching the sun, that is, in average from 743-804 km/s at 0.3-1 AU to 791-896 km/s at 0.1-0.3 AU.

  27. Study of solar wind acceleration mechanisms with coordinated interplanetary scintillation observations at different frequencies.

    KOJIMA Masayoshi, MORI Hirotaka, MISAWA Hiroaki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for General Scientific Research (C)

    Institution: Nagoya University

    1992 - 1994

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    1. We studied the origin of a low-speed solar wind using the solar wind speed measured by interplanetary scintillation (IPS), the soft X-ray solar corona data observed by the Yohkoh satellite, and photospheric magnetic field. We have found that the low-speed wind originated from over a sun spot region has a lower speed than that from the magnetic neutral line on the source surfase. 2. We observed the phenomena of large acceleration in high-speed solar winds at distances of 0.1-0.3 AU using the IPS method. To confirm the reliability of the observational results, we estimated possible biasing effects in the observations by computer simulation. we have found that any biasing effects cannot cause the observational phenomena of the large acceleration. 3. We studied the inner scale in micro turbulence using the IPS data observed at microfrequencies. The inner scale shows small but significant difference between a high-speed wind and a low-speed wind. This suggests that the inner scale is determined by cyclotron dumping. We also found that the behavior of the inner scale near the sun suggesting non-radial density divergence caused by solar wind acceleration. 4. We studied the random velocity which is expected to be related to the MHD waves in the solar wind. We found that the radial distance dependence is obviously different between a high-speed wind and a low-speed wind : the high-speed wind shows increase of the random velocity at 0.1 AU,while the low-speed wind shows no radial distance dependency up to 0.1 AU. 5. We made comparison of the solar wind speeds measured by the Ulysses and by the IPS.We found that if the turbulence level of density is proportional inversely to the root square of a speed, the IPS speeds agree with the Ulysses observations.

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Social Activities 21

  1. 地球電磁気・地球惑星圏学会一般公開イベント「地球・宇宙のミステリーを語りつくせ！ 科学探偵になろう！」

    日本、東京都立川市、国立極地研究所

    2024/11/23 - 2024/11/23

  2. 宇宙教室「ラジオを作成し電波星を探そう！」

    日本、宮城県角田市、角田市スペースタワー・コスモハウス

    2024/06/23 - 2024/06/23

  3. 地球電磁気・地球惑星圏学会一般公開イベント「はかせと体験！地球・宇宙のふしぎ」

    日本、宮城県仙台市、仙台市天文台

    2023/09/23 - 2023/09/23

  4. 仙台市天文台×東北大学大学院理学研究科公開サイエンス講座 2023「よってらっ星！見てらっ星！惑星冒険★秋まつり」

    日本、宮城県仙台市、仙台市天文台

    2023/09/09 - 2023/09/09

  5. 宇宙教室「惑星探査を体験しよう!」

    日本、宮城県角田市、角田市スペースタワー・コスモハウス

    2023/06/18 - 2023/06/18

  6. 地球電磁気・地球惑星圏学会一般公開イベント「体験型☆地球・宇宙マスターを目指せ!」

    日本, 神奈川県相模原市, 相模原市立産業会館

    2022/11/03 - 2022/11/03

  7. 仙台市天文台×東北大学大学院理学研究科公開サイエンス講座「ワクワク惑星探査〜行け行け僕らの火星ローバー！〜」

    日本, 宮城県仙台市, 仙台市天文台

    2022/07/31 - 2022/07/31

  8. 地球電磁気・地球惑星圏学会一般公開イベント「科学実験で宇宙・惑星・地球の不思議を体験しよう!」

    2019/10/27 -

  9. 地球電磁気・地球惑星圏学会一般公開イベント「はかせとワクワク大科学実験☆ 地球と宇宙のひみつを解明しよう！」

    2018/11/23 -

  10. 地球電磁気・地球惑星圏学会一般公開イベント「京都で体験！ キミの知らない宇宙と地球の物語」

    2017/10/15 -

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    ラジオ工作を通した自然電波現象、観測の紹介

  11. 地球電磁気・地球惑星圏学会アウトリーチ活動「ラジオを作って電波星を探そう」

    2017/09/10 -

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    ラジオ工作を通した自然電波現象、観測の紹介

  12. 地球電磁気・地球惑星圏学会一般公開イベント「宇宙の天気は今日も気まぐれ!」

    2016/11/19 -

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    サイエンスカフェチューター

  13. 地球電磁気・地球惑星圏学会アウトリーチ活動「電波をキャッチ！ ラジオを作って電波星を探そう」

    2016/06/18 -

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    ラジオ工作を通した自然電波現象、観測の紹介

  14. 地球電磁気・地球惑星圏学会一般公開イベント「きょう、地球をキミの手に！宇宙をキミの手で！」

    2015/11/03 -

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    担当者：北 元、三澤 浩昭 他 担当内容：ラジオ工作

  15. 地球電磁気・地球惑星圏学会一般公開イベント「見て・さわって・感じよう！電波と磁場の不思議 ～」

    2014/11/02 -

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    担当者：三澤浩昭 他 担当内容：ラジオ工作

  16. 福島県伊達市小学校理科教員研修会

    2014/07/23 -

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    講演者：三澤浩昭 講演タイトル：電波望遠鏡観測による太陽・惑星科学

  17. 地球電磁気・地球惑星圏学会アウトリーチイベント「身近なワンダーランド 宇宙と地球のふしぎがいっぱい」

    2013/11/02 -

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    地球電磁気・地球惑星圏学会アウトリーチ部会が、学会講演会開催に合わせて開催する小中学生～一般向けの研究紹介行事に説明者として参加し、電波計測の基礎実験について紹介を行った。

  18. サンエンCHu!”『夕焼け家族』 （放射線帯）

    2010/10/09 -

  19. 中学校職場体験学習・蔵王町円田中学校／東北大学

    2004/12 -

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    中学生の職場体験学習において電波観測実験実習を担当

  20. 中学校職場体験学習・蔵王町円田中学校／東北大学

    2003/12 -

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    中学生の職場体験学習において観測実験実習を担当

  21. 大学探検2003・仙台市教育指導課／東北大学

    2003/07 -

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    中学生の大学での研究内容実習体験。

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Other 21

  1. 第19回 惑星圏研究会

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    太陽系の惑星は、惑星自身の持つ特徴と太陽からの距離により、それぞれ個性的な大気とプラズマ環境を持っている。各惑星環境とその変動の理解を目指すとともに、新しい研究課題とその解決に向けた研究・観測手法や観測プラットフォームについての議論を行う。

  2. 第18回 惑星圏研究会

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    太陽系の惑星は、惑星自身の持つ特徴と太陽からの距離により、それぞれ個性的な大気とプラズマ環境を持っている。各惑星環境とその変動の理解を目指すとともに、新しい研究課題とその解決に向けた研究・観測手法や観測プラットフォームについての議論を行う。

  3. 電波観測による太陽高エネルギー粒子(SEP)現象の研究

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    本研究では、先ず太陽電波の高分解・広周波数帯域観測を行い得る地上システムを構築し、太陽Ⅱ型電波の広帯域微細構造の検出を目指す。次にⅡ型電波微細構造解析およびSEP現象との照合解析から、(1)SEP現象と関連を持つⅡ型電波の特徴の精査 を行い、更に、(2)他の観測から得られる多波長の太陽活動現象イメージ等との比較や、CMEの数値シミュレーション等との比較に基づき、(1)で同定したⅡ型電波・SEP現象の発生環境・条件の導出 を目指す。また、宇宙災害科学面でも重要な、(3)Ⅱ型電波の観測に基づくSEP現象の早期発生予測に向けたアルゴリズム策定 も課題とする。

  4. 木星放射線帯粒子変動要因の観測研究

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    木星から放射されるシンクトロン電波(JSR)は、木星放射線帯の粒子ダイナミクスの情報を持つ。申請者らはこれまで名古屋大学他の電波望遠鏡を用いたJSR強度の連続観測に基づき、数日～週程度の短期の時間スケールで強度変化を起こす現象について研究を行い、その現象が①太陽紫外線照射量変動と関連を持つ成分、②木星磁気圏で自律的に発生すると考えられているサブストーム型現象の出現と関連を持つ成分 の2種が存在する可能性を示してきた。一方で、これら①、②のプロセスでは説明の難しい第3の成分(③)がある可能性が示され、従来はその存在が疑問視されてきた太陽風変動と関連する成分である可能性が改めて示唆されてきており、この成分-③の存在の検証と成因の考察が木星放射線帯粒子ダイナミクス研究における新しいテーマになってきている。本研究では、特に、この成分-③の存在の検証と、太陽風変動との関連の査定を目的として、電波観測に基づく研究を行う。

  5. 第17回 惑星圏研究会

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    太陽系の惑星は、惑星自身の持つ特徴と太陽からの距離により、それぞれ個性的な大気とプラズマ環境を持っている。各惑星環境とその変動の理解を目指すとともに、新しい研究課題とその解決に向けた研究・観測手法や観測プラットフォームについての議論を行う。

  6. 太陽高エネルギー粒子現象に関わる電波バーストの同定に向けた基礎研究

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    太陽大気の大規模な変動現象であるコロナ放出現象(CME)の発生時には、Ⅱ型と呼ばれる電波バーストが頻出するが、同時に、宇宙飛行士や航空機搭乗者への放射線障害を引き起こす危険のある太陽高エネルギー粒子(SEP)現象を伴う場合があることが知られる。近年の研究により、特にⅡ型電波の出現周波数範囲が広い場合にSEP現象の発生確率が高いことが示されている。光速で伝わる電波はより伝搬速度の遅いSEPに先んじて地球に到達するので、この研究結果はⅡ型電波の出現周波数範囲の同定がSEP発生の早期警戒に役立つ可能性を示唆する。また、申請者らの研究によりⅡ型電波は非常に大きな粒子加速の存在を暗示する微細構造の集合体である可能性が示され、この電波の精細解析が電波とSEP発生のキーとなる可能性がある。本研究ではⅡ型電波を広帯域且つ高分解観測可能なスペクトル観測装置を構築し、電波の微細構造の観測・解析から、特にSEP現象に関わるⅡ型電波の発生環境・条件の導出を行う。また、Ⅱ型電波の出現周波数範囲を迅速に同定し得るアルゴリズムの策定も課題とし、電波観測に基づく太陽活動危険状態監視の実現化に向けた基礎研究を行う。

  7. 広帯域太陽電波常時観測による太陽活動危険状態の研究

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    太陽面近傍～コロナ域を起源とする20～500MHz の広帯域の太陽電波を観測可能な電波スペクトル観測装置を開発し、電波による太陽活動の常時モニターの確立を行う。更に、この電波観測と、地上や科学衛星により得られる多波長の太陽現象イメージや高エネルギープロトン現象(SEP)等との比較・照合を通じて、地球や地球周辺の環境や人間活動に影響を及ぼす現象と電波現象との関連を精査し、電波観測による太陽活動危険状態監視の役割を明らかにする。

  8. 木星内部磁気圏変動要因の研究

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    申請者らが明らかにしてきた木星内部放射線帯の短期変動現象の中で、特に日のオーダーで発生する速い変動の発生原因を究明するため、極域変動現象との関連性を観測的に求めようとするものである。

  9. 太陽高エネルギー粒子の発生過程の研究

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    地上からの電波観測に基づく太陽高エネルギー粒子の発生過程の探査・研究

  10. 宇宙天気とその境界領域の研究

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    地球磁気嵐を太陽面現象との関係で捉えた磁気嵐の総合研究

  11. 木星内部磁気圏急変現象の観測研究

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    木星放射線帯電波の観測に基づく磁気圏の急変現象出現様相の同定と物理過程の解明

  12. 大型電波干渉計(GMRT:India)を用いた木星放射線帯ダイナミクスの研究

  13. オーロラ嵐とその学際領域の研究

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    太陽-地球系物理学の視点から、オーロラ嵐群の起源を太陽面現象との関連で研究する。また、オーロラ嵐に関連した広範な学際領域を調べ、科学的思考法とオーロラ学の裾野を広く文科系領域に迄拡げた研究を行う。

  14. 木星放射線帯長期変動の観測研究

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    木星から放射されるシンクロトロン電波(JSR)は、放射線帯電子のダイナミクスの情報を持つ。申請者らはSTE研の電波望遠鏡を用いた過去約12年のJSRの観測研究により、低エネルギー電子(～6MeV～)の情報を持つ低周波数のJSRの年変動特性を明らかにし、過去に報告されている、高エネルギー電子(～20MeV～)を起源とする高周波数のJSRの変動とは様相が異なる結果を得た。この差異の理由として、観測時期や周波数(エネルギー)の違いが考えられるが、いずれの場合も放射線帯変動は太陽風大規模変動による緩やかな影響が動径拡散を介して現れたとする従来の解釈は不十分である可能性を示唆する。本研究は、複数の周波数での定常観測を継続実施することで時間変動の特徴をクリアにし、木星放射線帯変動の駆動機構の検証・再考を行う。

  15. オーロラ嵐活動を説明する太陽構造変動のモデル化

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    オーロラ嵐の短期・長期変動を制御する源泉として太陽風の変動が大きな役割を持つが、その太陽風の制御には太陽の三双極子構造が重要であることが示唆されてきた。本研究では、この三双極子構造とその変動を、太陽内部の大規模対流と関連付け、モデル化して解明を試みる。

  16. 木星電波の多波長観測による内部磁気圏ダイナミックスの探査

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    木星から放射されるシンクロトロン電波(JSR)は、放射線帯の相対論的エネルギー(MeVオーダー)電子の分布やその変動の情報をもたらす。本研究ではJSRについて、名古屋大学の大型電波望遠鏡を用いた327MHzでの観測、EISCATでの930MHzと1.42GHzでの観測、CRL(NiCT)での2.3GHzでの観測からスペクトルを導出し，①電波強度の短期変動特性(日～週オーダー)を求めること、②JSR変動特性と太陽・太陽風の物理諸量および木星赤外オーロラ観測データから得られる大気加熱現象との関係を解析し、変動の制御要素を絞り込むこと、及び、③申請者らが開発中のJSR放射モデルを用いて、スペクトル計測から予測される電波強度変動の物理要因(粒子のフラックス，拡散，ピッチ角等)の同定、更に、②から得られる変動制御因子の役割をモデルに組入れ、制御因子の変動とJSR変動とがセルフ・コンシステントに説明可能な相対論的電子の加速・拡散過程を求め、木星内部磁気圏で生じている電磁現象のダイナミクスを探る。

  17. Investigation of time variation of Jupiter's synchrotron radiation with the EISCAT UHF antennas

  18. オーロラ嵐活動を説明する太陽構造変動のモデル化

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    オーロラ嵐の短期・長期変動に関わる太陽風の制御要素としての太陽の大規模磁場構造とその変動を、太陽内部の大規模対流と関連づけつつ現象論的にモデル化する。

  19. シンクロトロン電波の観測による木星内部磁気圏現象の探査

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    木星から放射されるシンクロトロン電波(JSR)は，放射線帯の高エネルギー(MeVオーダー)粒子の分布やその変動の情報をもたらす。本研究ではこの電波を観測し，①電波強度の変動特性を短期(日～週オーダー)・長期(月～年オーダー)で明らかにすること，②変動特性と太陽・太陽風の物理諸量との関係を解析し変動の制御要素を絞り込むこと，及び，③JSR放射モデルを構築し，予測される電波強度と観測された電波強度変動との比較を通じて高エネルギー粒子の加速及び拡散過程を求め，木星内部磁気圏で生じている電磁現象のダイナミクスを探る。

  20. Optical observation of Jovian plasma processes in Australia

  21. フェーズドアレイアンテナの位相・利得較正装置の開発

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