Publication list
peer-reviewed publication
First author
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Oyama, S., Kubota, K., Morinaga, T., Tsuda, T. T., Kurihara, J., Larsen, M. F., M. Yamamoto, L. Cai, Simultaneous FPI and TMA measurements of the lower thermospheric wind in the vicinity of the poleward expanding aurora after substorm onset. Journal of Geophysical Research: Space Physics, 122. https://doi.org/10.1002/2017JA024613, 2017 featured in Eos Research Spotlight
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Oyama, S., K. Shiokawa, Y. Miyoshi, K. Hosokawa, B. J. Watkins, J. Kurihara, T. T. Tsuda, and C. T. Fallen, Lower thermospheric wind variations in auroral patches during the substorm recovery phase, J. Geophys. Res. Space Physics, 121, doi:10.1002/2015JA022129, March 31, 2016. featured in JGR Space Physics
Coauthor
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Ieda, A., S. Oyama, H. Vanhamäki, R. Fujii, A. Nakamizo, O. Amm, T. Hori, M. Takeda, G. Ueno, A. Yoshikawa, R. J. Redmon, W. F. Denig, Y. Kamide, and N. Nishitani, Approximate forms of daytime ionospheric conductance, J. Geophys. Res. Space Physics, 119, pages 10,397–10,415. doi:10.1002/2014JA020665, Jan. 2015.
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Burton, L. M., J. A. Cohen, R. Pradipta, A. Labno, M. C. Lee, O. Batishchev, D. L. Rokusek, S. P. Kuo, B. J. Watkins, and S. Oyama, Excitation and diagnosis of cascading Langmuir waves in ionospheric plasmas at Gakona, Alaska, Phys. Scr., 014030 doi:10.1088/0031-8949/2008/T132/014030, 2008.
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Cohen, J. A., L. M. Burton, R. Pradipta, A. Labno, M.C. Lee, S.P. Kuo, B.J. Watkins, and S. Oyama, Ionospheric Ducts and Plasma Waves Induced by HF Heater over Gakona, Proceedings of URSI General Assembly, URSI General Assembly, Chicago, USA, 2008.
Supplements
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Oyama, S., S. Nozawa, R. Fujii, K. Shiokawa, Y. Otsuka, and T. T. Tsuda, Optical instruments of STEL, Nagoya University at the EISCAT radar site in Tromsø, Norway, CAWSES-II Kickoff Symposium in Japan, Proceedings, 113-116. 2010.
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Nozawa, S., Y. Ogawa, S. Oyama, H. Miyaoka, T. Kawahara, T. T. Tsuda, and M. Tsutsumi, Research on the lower thermosphere and mesosphere using EISCAT radars, and other instruments, CAWSES-II Kickoff Symposium in Japan, Proceedings, 46-48, 2010.
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Kurihara, J., Y. Ogawa, S. Oyama, S. Nozawa, M. Tsutsumi, C. M. Hall, Y. Tomikawa, and R. Fujii, Links between a stratospheric sudden warming and thermal structures and dynamics in the high-latitude mesosphere, lower thermosphere, and ionosphere, CAWSES-II Kickoff Symposium in Japan, Proceedings, 51-52, 2010.
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Ogawa, Y., and EISCAT Japan project team, Long-term variations of the polar ionosphere and thermosphere observed with European Incoherent Scatter (EISCAT) radars, CAWSES-II Kickoff Symposium in Japan, Proceedings, 76-78, 2010.
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Tsuda, T. T., S. Nozawa, T. D. Kawahara, T. Kawabata, S. Oyama, R. Fujii, Y. Ogawa, N. Saito, S. Wada, A. Brekke, and C. M. Hall, A sodium lidar project at Tromsø, Norway: First report on test observations at Wako, Japan, CAWSES-II Kickoff Symposium in Japan, Proceedings,121-124, 2010.
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Oyama, S., and B. J. Watkins, Artificial ionospheric irregularities measured with the MUIR (Modular UHF Ionospheric Radar) at HAARP (High Frequency Active Auroral Research Program), National Institute of Information and Communications Technology, Seasonal Report, 53(1/2), 95-102, 2007.
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Oyama, S., Y. Murayama, M. Ishii, M. Kubota Development of SALMON system and the environment data transfer experiment, Journal of Communications Research Laboratory, 2002.
Invited talk
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Oyama, S. and SDI-3D project team, SDI-3D project, 44th Apatity Seminar, online, 2021/03.
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Oyama, S., A. Aikio, H. Vanhamäki, A. Shinbori, M. Rietveld, Y. Ogawa, M. Kellinsalmi, T. Raita, K. Shiokawa, I. Virtanen, L. Cai, A. Workayehu, M. Pedersen, K. Kauristie, B. Kozelov and A. Demekhov, Thermospheric wind acceleration in the ionospheric trough for Kp = 0+, COSPAR 2021, online, January 2021.
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Oyama, S. and SDI-3D project team, SDI-3D, CHAMOS workshop 2020, remote meeting, October 2020.
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大山伸一郎, 「超高層大気におけるN-I結合の理解に向けた衛星-地上共同観測への期待」, 宇宙空間からの地球超高層大気観測に関する研究会, 遠隔開催, September 2020.
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大山伸一郎, 「極域熱圏風加速の空間分布とSDIによる二次元測定の重要性」, 中間圏・熱圏・電離圏 (MTI) 研究集会, 遠隔開催, September 2020.
- Oyama, S., PWING: Global observation network along 60˚N, Sirius public lecture in Jyvaskyla, Finland, October 2019.
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Oyama, S., M. Conde, A. Aikio, H. Vanhamäki, I. Virtanen, L. Cai, E. Turunen, T. Ulich, K. Kauristie, U. Brandström, and SDI-3D project team, New insights found from coalescence of the ionospheric and thermospheric measurements at auroral latitudes, The 45th Annual European Meeting on Atmospheric Studies by Optical Methods, Kiruna, Sweden, August 2018.
- Oyama, S., A. E. Kero, C. Rodger, M. A. Clilverd, Y. Miyoshi, N. Partamies, E. Turunen, T. Raita, P. T. Verronen, S. Saito, K. Hosokawa, Y. Ogawa, S. Kurita, S. Nozawa, H. Miyaoka, Y. Tanaka, and R. Fujii, Coordinated observations with the ground-based instruments and satellites to study energetic electron precipitation and auroral morphology at the substorm recovery phase, International HEPPA-SOLARIS Workshop, Roanoke, USA, June 2018.
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Oyama, S., A. Aikio, M. Conde, H. Vanhamäki, I. Virtanen, L. Cai, K. Kubota, T. Morinaga, T. T. Tsuda, J. Kurihara, M. F. Larsen, M. Yamamoto, M. Hirahara, and K. Shiokawa, New insights found from coalescence of the ionospheric and thermospheric measurements at auroral latitudes, JpGU 2018, Makuhari Japan, May 2018.
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Oyama, S., K. Shiokawa, A. Aikio, L. Cai, M. Hirahara, B. J. Watkins, C. T. Fallen, M. G. Conde, and A. Yatagai, Dependency of the thermospheric dynamics on the auroral morphology, ISROSES-III, Varna, Bulgaria, September 2016.
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大山伸一郎, 「宇宙からオーロラを見るとなぜドーナツ状になっているのか?」, 名古屋大学ホームカミングデー 講演・体験企画「太陽から地球まで」, 名古屋, October 2014.
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大山伸一郎, Discrete Aurora 近傍の電流系概論, 中間圏・熱圏・電離圏研究集会, 小金井, September 2014.
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Oyama, S., J. Kurihara, T. T. Tsuda, K. Shiokawa, Y. Miyoshi, B. J. Watkins, Thermospheric wind variations in the pulsating aurora, Asia Oceania Geosciences Society, Sapporo, July 2014.
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Oyama, S., Aurora and thermospheric dynamics, Japan-Norway symposium on Space Science in Polar Region, Oslo, June, 2012.
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Oyama, S., Small-scale thermospheric wind dynamics at high latitudes, STEL-KASI workshop, Nagoya, October 2010.
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Oyama, S., Small-scale auroral GW observations, ISSI-workshop coupling, Bern, Switzerland, September, 2010.
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Oyama, S., S. Nozawa, R. Fujii, K. Shiokawa, Y. Otsuka, and T. T. Tsuda, Report of the STEL optical observation at the northern Scandinavia by March 2010, Japan Geoscience Union Meeting 2010, Makuhari, May 2010.
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Oyama, S., S. Maeda, H. Shinagawa, and B. J. Watkins, Vertical motions in the polar lower thermosphere/ionosphere: Recent results from the incoherent-scatter radar, GSSS-2007, Greenland, May 2007.
Oral/Poster presentation (international only; since 2005)
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Oyama, S., Miyamoto Taishiro, Tero Raita, Keisuke Hosokawa, Yoshizumi Miyoshi, Yasunobu Ogawa, and Satoshi Kurita, A case study to estimate energy spectra of pulsating auroral electrons from cosmic noise absorption and auroral brightness, 44th Apatity Seminar, online, March 2021.
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Oyama, S., A. Aikio, H. Vanhamäki, A. Shinbori, M. Rietveld, Y. Ogawa, M. Kellinsalmi, T. Raita, K. Shiokawa, I. Virtanen, L. Cai, A. Workayehu, M. Pedersen, K. Kauristie, B. Kozelov and A. Demekhov, Event study of the M-I-T coupling in the ionospheric trough region for Kp = 0+, PWING-ERG workshop, online, March 2021.
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Oyama, S., A. Shinbori, Y. Ogawa, M. Kellinsalmi, T. Raita, M. Rietveld, A. Aikio, H. Vanhamäki, K. Shiokawa, I. Virtanen, L. Cai, A. B. Workayehu, M. Pedersen, K. Kauristie, T. T. Tsuda, B. Kozelov, A. Demekhov, A. Yahnin, F. Tsuchiya, A. Kumamoto, Y. Kasahara, A. Matsuoka, M. Shoji and M. Teramoto, An event study of the M-I-T coupling at a pseudo breakup during geomagnetically quiet conditions, AGU Fall Meeting, online, December 2020.
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Oyama, S., Anita Aikio, Heikki Vanhamaki, Atsuki Shinbori, Mike Rietveld, Yasunobu Ogawa, Mirjam Kellinsalmi, Tero Raita, Kazuo Shiokawa, Ilkka Virtanen, Lei Cai, Abiyot Workayehu, Marcus Pedersen, Kirsti Kauristie, Boris Kozelov and Andrei Demekhov, Thermospheric wind acceleration in the ionospheric trough for Kp = 0+, JpGU 2020, online, July 2020.
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Oyama, S., Atsuki Shinbori, Anita Aikio, Heikki Vanhamaki, Yasunobu Ogawa, Mirjam Kellinsalmi, Tero Raita, Mike Rietveld, Kazuo Shiokawa, Ilkka Virtanen, Lei Cai, Abiyot Workayehu, Marcus Pedersen, Kirsti Kauristie, Boris Kozelov and Andrei Demekhov, SAR arc at 68o geomagnetic (71o geographic) North for Kp = 0+, JpGU 2020, online, July 2020.
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Oyama, S., A. Aikio, H. Vanhamäki, A. Shinbori, M. Rietveld, Y. Ogawa, M. Kellinsalmi, T. Raita, K. Shiokawa, I. Virtanen, L. Cai, A. Workayehu, M. Pedersen, K. Kauristie, B. Kozelov and A. Demekhov, SAR arc at 68˚ geomagnetic (71˚ geographic) North for Kp = 0+, Apatity Seminar 2020, Apatity, Russia, March 2020
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Oyama, S., Anita Aikio, Heikki Vanhamaki, Yasunobu Ogawa, Atsuki Shinbori, Mike Rietveld, Mirjam Kellinsalmi, Abiyot Workayehu, Marcus Pedersen, Diversity of the auroral-subauroral ionosphere and thermosphere during very low Kp condition, Observatory Days 2020, Sodankyla, Finland, January 2020
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Oyama, S., Anita Aikio, Mark G. Conde, Heikki Vanhamäki, Ilkka Virtanen, Thomas Ulich, Urban Bröndström, Pekka Verronen, Monika Anderson, Niilo Kalakoski, Lassi Roininen, Sari Lasanen, Abiyot Workayehu, Kazuo Shiokawa, Heqiucen Xu, Mamoru Ishii, Masafumi Hirahara, Takeshi Sakanoi, Masato Kagitani, Juha Sorri, Tomi Teppo, Yoshimasa Tanaka, Christopher Fallen, Brenton J. Watkins, Mikko Orispää, Yasunobu Ogawa, Lei Cai, Esa Turunen, Kirsti Kauristie, Takuo T. Tsuda, and Junichi Kurihara, Spatial distribution of the polar thermospheric wind acceleration and importance of the 2D measurement with SDIs, AGU Fall Meeting 2019, San Francisco, USA, December 2019
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Oyama, S., Proposed Projects 2019: related to the CHAMOS activity, CHAMOS meeting, Helsinki, Finland, October 2019
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Oyama, S., Anita Aikio, Mark G. Conde, Heikki Vanhamäki, Ilkka Virtanen, Thomas Ulich, Urban Bröndström, Pekka Verronen, Monika Anderson, Niilo Kalakoski, Lassi Roininen, Sari Lasanen, Abiyot Workayehu, Kazuo Shiokawa, Heqiucen Xu, Mamoru Ishii, Masafumi Hirahara, Takeshi Sakanoi, Masato Kagitani, Juha Sorri, Tomi Teppo, Yoshimasa Tanaka, Christopher Fallen, Brenton J. Watkins, Mikko Orispää, Yasunobu Ogawa, Lei Cai, Esa Turunen, Kirsti Kauristie, Takuo T. Tsuda, and Junichi Kurihara, Spatial distribution of the polar thermospheric wind acceleration and importance of the 2D measurement with SDIs, EISCAT symposium, Oulu, Finland, August 2019
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Oyama, S., Anita Aikio, Mark G. Conde, Heikki Vanhamäki, Ilkka Virtanen, Thomas Ulich, Lassi Roininen, Pekka Verronen, Takeshi Sakanoi, SDI-3D project team, Spatial distribution of the polar thermospheric wind acceleration and importance of the 2D measurement, SuperDARN workshop, Fujiyoshida, May 2019
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Oyama, S., Anita Aikio, Mark G. Conde, Heikki Vanhamäki, Ilkka Virtanen, Thomas Ulich, Urban Bröndström, Pekka Verronen, Monika Anderson, Niilo Kalakoski, Lassi Roininen, Sari Lasanen, Abiyot Workayehu, Kazuo Shiokawa, Heqiucen Xu, Mamoru Ishii, Masafumi Hirahara, Takeshi Sakanoi, Masato Kagitani, Juha Sorri, Tomi Teppo, Yoshimasa Tanaka, Christopher Fallen, Brenton J. Watkins, Mikko Orispää, Yasunobu Ogawa, Lei Cai, Esa Turunen, Kirsti Kauristie, Takuo T. Tsuda, and Junichi Kurihara, Spatial distribution of the polar thermospheric wind acceleration and importance of the 2D measurement, JpGU 2019, Makuhari, May 2019
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Oyama. S., Anita Aikio, Mark G. Conde, Heikki Vanhamäki, Ilkka Virtanen, Thomas Ulich, Urban Bröndström, Pekka Verronen, Monika Anderson, Niilo Kalakoski, Lassi Roininen, Sari Lasanen, Abiyot Workayehu, Kazuo Shiokawa, Heqiucen Xu, Mamoru Ishii, Masafumi Hirahara, Takeshi Sakanoi, Masato Kagitani, Juha Sorri, Tomi Teppo, Yoshimasa Tanaka, Christopher Fallen, Brenton J. Watkins, Mikko Orispää, Yasunobu Ogawa, Lei Cai, Esa Turunen, Kirsti Kauristie, Takuo T. Tsuda, and Junichi Kurihara, SDI-3D project: MIT coupling study with the EISCAT_3D, EISCAT_3D user meeting, Uppsala, Sweden, May 2019
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Oyama, S., A. Aikio, M. G. Conde, H. Vanhamaki, I. Virtanen, T. Ulich, U. Brondstrom, P. Verronen, L. Roininen, Sari Lasanen, A. Workayehu, K. Shiokawa, Heqiucen Xu, M. Ishii, M. Hirahara, T. Sakanoi, Y. Tanaka, C. Fallen, B. J. Watkins, M. Orispaa, Y. Ogawa, L. Cai, E. Turunen, and K. Kauristie, SDI-3D project: MIT coupling study with the EISCAT_3D, Observatory Days 2019, Sodankyla, Finland, January 2019
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Oyama, S., A. Aikio, L. Cai, M. G. Conde, E. Turunen, K. Kauristie, H. Vanhamäki, I. Virtanen, U. Brändström, T. Ulich, A. Workayehu, K. Shiokawa, Heqiucen Xu, M. Ishii, M. Hirahara, T. Sakanoi, Y. Tanaka, C. Fallen, B. J. Watkins, M. Orispää, and Y. Ogawa, Dynamics of the polar thermospheric wind and substorm phases, AGU Fall Meeting, Washington, D.C., December 2018
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Oyama, S., Mark G. Conde, Anita Aikio, Esa Turunen, Kirsti Kauristie, Heikki Vanhamäki, Ilkka Virtanen, Urban Brändström, Thomas Ulich, Lei Cai, Abiyot Workayehu, Kazuo Shiokawa, Mamoru Ishii, Masafumi Hirahara, Takeshi Sakanoi, Yoshimasa Tanaka, Cristopher Fallen, and Brenton J. Watkins, SDI-3D project: measurements of the thermosphere, 2nd Nordic Observatory Meeting, Abisko, Sweden, October 2018
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Oyama, S., Ken KUBOTA, Takatoshi MORINAGA, Takuo TSUDA, Junichi KURIHARA, Miguel LARSEN, Masa-Yuki YAMAMOTO, Lei CAI, Simultaneous FPI and TMA Measurements of the Lower-thermospheric Wind in the Vicinity of the Poleward-expanding Aurora After Substorm Onset, AOGS, Honolulu, USA, June 2018
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Oyama, S., Mark G. Conde, Anita Aikio, Esa Turunen, Kirsti Kauristie, Heikki Vanhamäki, Ilkka Virtanen, Urban Brändström, Thomas Ulich, Lei Cai, Abiyot Workayehu, Kazuo Shiokawa, Mamoru Ishii, Masafumi Hirahara, Cristopher Fallen, Brenton J. Watkins, SDI-3D project: measurements of the thermosphere, EISCAT_3D user meeting, Uppsala, Sweden, May 2018
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Oyama, S., Antti Kero, Craig J. Rodge, Mark A. Clilverd, Yoshizumi Miyoshi, Noora Partamies, Esa Turunen, Tero Raita, Pekka T. Verronen, and Shinji Saito, Energetic electron precipitation and auroral morphology at the substorm recovery phase, ISAR-5, Tokyo, January 2018
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Oyama, S., Anita Aikio, Mark Conde, Heikki Vanhamaki, Ilkka Virtanen, Lei Cai, Esa Turunen, Antti Kero, Thomas Ulich, and Pekka Verronen, Beyond present understanding of Magnetosphere-Ionosphere-Thermosphere-Mesosphere coupled system at high latitudes: planning instruments to be collaborated with the EISCAT_3D, Sodankyla Observatory Days, Sodankyla, Finland, January 2018
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Oyama, S., A. Kero, C. J. Rodger, M. A. Clilverd, Y. Miyoshi, N. Partamies, E. Turunen, T. Raita, P. T. Verronen, and S. Saito, Energetic electron precipitation and auroral morphology at the substorm recovery phase, AGU Fall meeting, New Orleans, USA, December 2017
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Oyama, S. and SMILES-2 team, SMILES-2, CHAMOS workshop, Helsinki, October 2017
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Oyama, S., Y. Miyoshi, K. Hosokawa, K. Shiokawa, PWING team, PsA team, ARASE and Japanese observation activities at northern high latitudes, CHAMOS workshop, Helsinki, October 2017
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Oyama, S., PULSTAT study (energetic particle precipitation effects on the ionosphere), CHAMOS workshop, Helsinki, October 2017
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Oyama, S., Kazuo Shiokawa, Yoshizumi Miyoshi, Keisuke Hosokawa, Brenton J. Watkins, Junichi Kurihara, Takuo T. Tsuda, and Christopher T. Fallen, Lower thermospheric wind variations in auroral patches during the substorm recovery phase, EISCAT workshop, Tokyo, May 2017
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Oyama, S., A. Kero, C. J. Rodger, M. A. Clilverd, Y. Miyoshi, N. Partamies, E. Turunen, T. Raita, P. T. Verronen, and S. Saito, Energetic electron precipitation and auroral morphology at the substorm recovery phase, EISCAT workshop, Tokyo, May 2017
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Oyama, S., A. Kero, C. J. Rodger, M. A. Clilverd, Y. Miyoshi, N. Partamies, E. Turunen, T. Raita, P. T. Verronen, and S. Saito, Energetic electron precipitation and auroral morphology at the substorm recovery phase, JPGU 2017, Makuhari, May 2017
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Oyama, S., Kazuo Shiokawa, Yoshizumi Miyoshi, Keisuke Hosokawa, Brenton J. Watkins, Junichi Kurihara, Takuo T. Tsuda, and Christopher T. Fallen, Lower-thermospheric wind variations in auroral patches during the substorm recovery phase, AGU, December 2016.
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Oyama, S., Introduction of the EMCCD camera at the SGO site, CHAMOS meeting, Luosto, Finland, November 2016.
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Oyama, S., Next Target of PULSTAT, CHAMOS meeting, Luosto, Finland, November 2016.
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Oyama, S., K. Shiokawa, A. Aikio, L. Cai, M. Hirahara, B. J. Watkins, C. T. Fallen, M. G. Conde, and A. Yatagai, Dependency of the thermospheric dynamics on the auroral morphology, International Symposium on Recent Observations and Simulations of the Sun-Earth System III, Golden Sands, Varna, Bulgaria, September 2016.
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Oyama, S., Kazuo Shiokawa, Yoshizumi Miyoshi, Keisuke Hosokawa, Brenton J. Watkins, Junichi Kurihara, Takuo T. Tsuda, and Christopher T. Fallen, Lower-thermospheric wind variations in auroral patches during the substorm recovery phase, Mini-workshop on the generation/propagation of plasma waves in the Earth's inner magnetosphere, Tokyo, August 2016.
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Oyama, S., Yoshizumi Miyoshi, Shinji Saito, Antti Kero, Esa Turunen, Jyrki Manninen, Tero Raita, Noora Partamies, Pekka T. Verronen, Craig Rodger, Mark Clilverd, Correspondence of evolution of EEP with auroral-patch morphological changes at the substorm recovery phase, HEPPA-SOLARIS 2016, Helsinki, Finland, June 2016.
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Oyama, S., Kazuo Shiokawa, Satonori Nozawa, Yuichi Otsuka, Yoshizumi Miyoshi, Esa Turunen, Anita Aikio, Lei Cai, National/International joint studies with the Tromsø OMTI for studying the polar upper atmosphere, JPGU, May 2016.
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Oyama, S., Yoshizumi Miyoshi, Shinji Saito, Esa Turunen, Antti Kero, Noora Partamies, Pekka T Verronen, Jyrki Manninen, Ilkka Virtanen, Tero Raita, International joint study of EEP effects on the atmospheric minor components during pulsating aurora, JPGU, May 2016.
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Oyama, S., Status of the Japanese pulsating auroral study, 2015 CHAMOS workshop, Luosto, Finland, December 2015.
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Oyama, S., PULSTAT, 2015 CHAMOS workshop, Luosto, Finland, December 2015.
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Oyama, S.,Y. Miyoshi, S. Saito, E. Turunen, A. Kero, P. T. Verronen, and I. Virtanen,Energetic electron impacts on the atmosphere: groundbased observations with EISCAT radars and optical instruments,Founding Symposium for the Institute for Space-Earth Environment Research "Evolution of the Space-Sun-Earth Environmental system in space
and time", Nagoya, November 2015. -
Oyama, S.,EISCAT and optical observations of energetic electron precipitations associated with PsA,Workshop on Energetic Particle Precipitations and its Impacts on Middle Atmosphere, Nagoya, June 2015.
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Oyama, S.,Y. Miyoshi, E. Turunen, S. Saito, A. Kero, P. T. Verronen, and I. Virtanen,Impacts of the pulsating aurora on the atmosphere,EISCAT_3D user meeting, Uppsala, Sweden, March 2015.
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Oyama, S., Kazuo Shiokawa, Yoshizumi Miyoshi, Keisuke Hosokawa, Brenton J. Watkins, Junichi Kurihara, and Takuo T. Tsuda, Lower-thermospheric winds and auroral fragmentation into patches at the substorm recovery phase, GRAND CHALLENGE BRAIN STORMING SESSION, IN THEORY, NUMERICAL, EXPERIMENTAL, TECHNOLOGY AND INSTRUMENTATION, FOR ADVANCING COORDINATED GROUND AND SOUNDING ROCKET MISSIONS, JAXA, January 2015
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Oyama, S., J. Kurihara, T. T. Tsuda, K. Shiokawa, Y. Miyoshi, and B. J. Watkins, Asia Oceania Geosciences Society, Sapporo, July 2014.
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Oyama, S., J. Kurihara, T. T. Tsuda, K. Shiokawa, Y. Miyoshi, and B. J. Watkins, Ionospheric effects on the lower-thermospheric wind in the vicinity of nightside poleward expanding aurora after substorm onset, ICS-12, Ise-Shima, November 2014.
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Oyama, S., K. Hosokawa, Y. Miyoshi, K. Shiokawa, J. Kurihara, T. T. Tsuda, and B. J. Watkins, A proposal to the dissipated energy budget in the auroral ionosphere at the substorm recovery phase: Challenge from thermospheric wind variations in the pulsating aurora, AGU Fall Meeting, December 2014.
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Oyama, S., M. K. Ejir, S. Suzuki, K. Shiokawa, T. Nakamura, M. Tsutsumi, Y. Tomikawa, T. T. Tsuda, S. Nozawa, T. Takahashi, CHARACTERISTICS OF THE MESOSPHERIC GRAVITY WAVES DERIVED FROM OH AIRGLOW IMAGES AT TROMSOE, NORWAY, Third International Symposium on the Arctic Research, Tokyo, January, 2013.
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Oyama, S., S. Nozawa, R. Fujii, K. Shiokawa, Y. Otsuka, T. Takahashi, CURRENT STATUS OF THE STEL OPTICAL OBSERVATIONS AT THE TROMSOE EISCAT RADAR SITE, Third International Symposium on the Arctic Research, Tokyo, January, 2013.
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Oyama, S., S. Suzuki, K. Shiokawa, M. K. Ejiri, T. Nakamura, M. Tsutsumi, Y. Tomikawa, T. T. Tsuda, S. Nozawa, and T. Takahashi, Researching activity of the mesospheric gravity wave with optical instruments at Tromsoe, Norway, Antarctic Gravity Wave Imaging Network workshop, Tokyo, March 2013.
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Oyama, S., J. Kurihara, B. J. Watkins, T. T. Tsuda, and T. Takahashi, Temporal variations of the ion-neutral collision frequency in the polar lower ionosphere during periods of geomagnetic disturbances, The 16th EISCAT international symposium, Lancaster, UK, August 2013.
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Oyama, S., J. Kurihara, T. T. Tsuda, Y. Miyoshi, K. Shiokawa, and B. J. Watkins, Height-dependent ionospheric responses associated with substorm onset measured with the EISCAT UHF radar, The 16th EISCAT international symposium, Lancaster, UK, August 2013.
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Oyama, S., S. Nozawa, R. Fujii, K. Shiokawa, Y. Otsuka, T. T. Tsuda, and T. Takahashi, STEL optical observations at the Tromsø EISCAT radar site by March 2013 and contributions to CAWSES-II, the International CAWSES-II Symposium, November, 2013.
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Oyama, S., J. Kurihara, T. T. Tsuda, Y. Miyoshi, K. Shiokawa, and B. J. Watkins, Height-dependent ionospheric responses around auroras associated with substorm onset measured with the EISCAT UHF radar, the International CAWSES-II Symposium, November, 2013.
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Oyama, S., Y. Miyoshi, K. Shiokawa, J. Kurihara, T. T. Tsuda, and B. J. Watkins, Ionospheric/lower-thermospheric variations in the vicinity of night-side poleward expanding aurora around substorm onset, American Geophysical Union Fall meeting 2013, December, 2013.
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Oyama, S., Aurora and thermospheric dynamics, Japan-Norway symposium on Space Science in Polar Region, Oslo, June, 2012.
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Oyama, S., Shiokawa K., Suzuki S., Nozawa S., Otsuka Y., Tsutsumi M., Hall C. M., Meek C., and Manson A., Characteristics of the mesospheric gravity wave observed with an all-sky camera at Tromsoe, Norway in 2009-2010, The 4thIAGA/ICMA/CAWSES-II TG4 Workshop, Prague, Czech, February 2011.
- Oyama, S., Kazuo Shiokawa, Satonori Nozawa, Yuichi Otsuka, Masaki Tsutsumi, Shin Suzuki, Chris M. Hall, Chris Meek, and Alan Manson, Propagation characteristics of nighttime mesospheric waves observed with an all-sky camera at Tromsoe, Norway in 2009-2010, 38th COSPAR Scientific Assembly 2010, Bremen, Germany, July, 2010.
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Oyama, S., Small-scale auroral GW observation, ISSI Earth Science Workshop, Bern, Switzerland, September 2010.
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Oyama, S., Small-scale thermospheric wind dynamics at high latitudes, STEL-KASI workshop, Nagoya Japan, October 2010.
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Oyama, S., K. Shiokawa, S. Suzuki, S. Nozawa, Y. Otsuka, M. Tsutsumi, C. M. Hall, C. Meek, and A. H. Manson, Propagation direction of the nighttime mesospheric gravity waves in the OH airglow images at Tromsø, Norway in winter 2009, 2010 AGU Fall Meeting, San Francisco, December 2010.
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Oyama, S., S. Nozawa, R. Fujii, and T. T. Tsuda, Estimation of the layered ionospheric conductance using data taken with the multi-wavelength photometer and the EISCAT UHF radar, 14th International EISCAT workshop, 2009.
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Oyama, S., K. Shiokawa, J. Kurihara, S. Nozawa, T. T. Tsuda, Y. Koizumi-Kurihara, Y. Otsuka, M. Tsutsumi, C. M. Hall, C. Meek, and A. Manson, Initial reports of DELTA-2 campaign: tides measured with FPI, MF radar, and meteor radar, 14th International EISCAT workshop, 2009.
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Oyama, S., K. Shiokawa, J. Kurihara, S. Nozawa, T. T. Tsuda, R. Fujii, and Y. Otsuka, Initial reports of DELTA-2 campaign: results from FPI and all-sky cameras, 14th International EISCAT workshop, 2009.
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Oyama, S. and B. J. Watkins, Aspect sensitivity of the first 100 ms HF-modification measured with the MUIR at HAARP, 13th EISCAT workshop, 2007.
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Oyama, S., S. Maeda, H. Shinagawa, and B. J. Watkins, Physical mechanism to generate vertical motions in the polar lower thermosphere, 13th EISCAT workshop, 2007.
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S. Oyama, T. Watanabe, R. Fujii, S. Nozawa, Estimation of the Polar Ionospheric Conductance Using Data from the EISCAT Radar and the Multi-wavelengths Photometer, International CAWSES Symposium, 2007.
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S. Oyama, and B. J. Watkins, Aspect angle dependency of the HF modification measured with MUIR at HAARP, AGU Fall Meeting, 2007.
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Oyama, S., B. J. Watkins, R. T. Parris, and C. J. Heinselman, Initial high-range resolution results using MUIR at HAARP, RF Ionospheric Interaction Workshop, 2006.
- Oyama, S., B. J. Watkins, and F. T. Djuth, HF induced plasma lines measured with the HAARP AMISR during January/February 2005 campaign, RF ionospheric interaction workshop, 2005.
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Oyama, S., B. J. Watkins, S. Maeda, S. Nozawa, C. Lathuillere, and W. Kofman, Methodology for estimation of the lower thermospheric wind with the incoherent-scatter radar, CEDAR workshop, 2005.