Effect of Polar Cap Patches on the High-Latitude Upper Thermospheric Winds

Cai, L; Aikio, A; Oyama, S; Ivchenko, N; Vanhamäki, H; Virtanen, I; Buchert, S; Mekuriaw, ML; Zhang, Y

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 129 ( 8 )   2024.8

Occurrence of Mesospheric Frontal Structures Over the High Latitude Station, Tromsø, Norway

Chauhan, N; Shiokawa, K; Gurubaran, S; Nozawa, S; Oyama, SI; Nakamura, T

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 129 ( 7 )   2024.7

Spatiotemporal Development of Cosmic Noise Absorption at Subauroral Latitudes Using Multipoint Ground-Based Riometers

Kato, Y; Shiokawa, K; Tanaka, Y; Ozaki, M; Kadokura, A; Oyama, S; Oinats, A; Connors, M; Baishev, D

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 129 ( 7 )   2024.7

On the Factors Controlling the Relationship Between Type of Pulsating Aurora and Energy of Pulsating Auroral Electrons: Simultaneous Observations by Arase Satellite, Ground-Based All-Sky Imagers and EISCAT Radar

Ito, Y; Hosokawa, K; Ogawa, Y; Miyoshi, Y; Tsuchiya, F; Fukizawa, M; Kasaba, Y; Kazama, Y; Oyama, S; Murase, K; Nakamura, S; Kasahara, Y; Matsuda, S; Kasahara, S; Hori, T; Yokota, S; Keika, K; Matsuoka, A; Teramoto, M; Shinohara, I

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 129 ( 7 )   2024.7

Westward Excursion of Pc1/EMIC Waves and Their Source Protons: Paradoxical Observations From Ground and Space

Yin, ZF; Zhou, XZ; Hu, ZJ; Yue, C; Zong, QG; Liu, ZY; Liu, JJ; Shiokawa, K; Oyama, SI; Baishev, D

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 129 ( 5 )   2024.5

Statistical Analysis of Low-Latitude Boundary of Polar-Type Medium-Scale Traveling Ionospheric Disturbances Observed by a 630-nm Airglow Imager at Nyrölä, Finland

Sato, M; Shiokawa, K; Oyama, S; Otsuka, Y; Shinbori, A; Oksanen, A

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 129 ( 4 )   2024.4

Thermospheric Wind Response to March 2023 Storm: Largest Wind Ever Observed With a Fabry-Perot Interferometer in Tromsø, Norway Since 2009

Oyama, S; Vanhamäki, H; Cai, L; Shinbori, A; Hosokawa, K; Sakanoi, T; Shiokawa, K; Aikio, A; Virtanen, II; Ogawa, Y; Miyoshi, Y; Kurita, S; Nishitani, N

SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS   Vol. 22 ( 3 )   2024.3

Longitudinal Development of Cosmic Noise Absorption Based on Multipoint Observations at Subauroral Latitudes During Storm-Time Substorms on 25-28 August 2018

Kato, Y; Shiokawa, K; Tanaka, Y; Ozaki, M; Kadokura, A; Oyama, SI; Oinats, A; Connors, M; Baishev, D

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 129 ( 1 )   2024.1

Correspondence of Pi2 Pulsations, Aurora Luminosity, and Plasma Flux Fluctuation Near a Substorm Brightening Aurora: Arase Observations

Chen, L; Shiokawa, K; Miyoshi, Y; Oyama, S; Jun, CW; Ogawa, Y; Hosokawa, K; Kazama, Y; Wang, SY; Tam, SWY; Chang, TF; Wang, BJ; Asamura, K; Kasahara, S; Yokota, S; Hori, T; Keika, K; Kasaba, Y; Kumamoto, A; Tsuchiya, F; Shoji, M; Kasahara, Y; Matsuoka, A; Shinohara, I; Nakamura, S

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 128 ( 10 )   2023.10

An Implication of Detecting the Internal Modulation in a Pulsating Aurora: A Conjugate Observation by the Arase Satellite and All-Sky Imagers

Nanjo S., Ebukuro S., Nakamura S., Miyoshi Y., Kurita S., Oyama S. -I., Ogawa Y., Keika K., Kasahara Y., Kasahara S., Matsuoka A., Hori T., Yokota S., Matsuda S., Shinohara I., Wang S. -Y., Kazama Y., Jun C. -W., Kitahara M., Hosokawa K.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 128 ( 8 )   2023.8

A Ground-Based Instrument Suite for Integrated High-Time Resolution Measurements of Pulsating Aurora With Arase

Hosokawa K., Oyama S. -I., Ogawa Y., Miyoshi Y., Kurita S., Teramoto M., Nozawa S., Kawabata T., Kawamura Y., Tanaka Y. -M., Miyaoka H., Kataoka R., Shiokawa K., Brandstrom U., Turunen E., Raita T., Johnsen M. G., Hall C., Hampton D., Ebihara Y., Kasahara Y., Matsuda S., Shinohara I., Fujii R.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 128 ( 8 )   2023.8

IMF Dependence of Midnight Bifurcation in the Thermospheric Wind at an Auroral Latitude Based on Nine Winter Measurements in Tromso, Norway

Oyama S., Hosokawa K., Vanhamaki H., Aikio A., Sakanoi T., Cai L., Virtanen I. I., Shiokawa K., Nishitani N., Shinbori A., Ogawa Y.

GEOPHYSICAL RESEARCH LETTERS   Vol. 50 ( 14 )   2023.7

Geomagnetic activity dependence and dawn-dusk asymmetry of thermospheric winds from 9-year measurements with a Fabry-Perot interferometer in Tromso, Norway

Oyama Shin-ichiro, Aikio Anita, Sakanoi Takeshi, Hosokawa Keisuke, Vanhamaki Heikki, Cai Lei, Virtanen Ilkka, Pedersen Marcus, Shiokawa Kazuo, Shinbori Atsuki, Nishitani Nozomu, Ogawa Yasunobu

EARTH PLANETS AND SPACE   Vol. 75 ( 1 )   2023.5

Ionospheric modulation by EMIC wave-driven proton precipitation: Observations and simulations Invited Reviewed International coauthorship

(101) Tian, X., Y. Yu, F. Gong, L. Ma, J. Cao, S. C. Solomon, P. R. Shreedevi, K. Shiokawa, Y. Otsuka, S. Oyama, Y. Miyoshi

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS     2023.1

Multi-event analysis of magnetosphere-ionosphere coupling of nighttime medium-scale traveling ionospheric disturbances from the ground and the Arase satellite Invited Reviewed

(100) Kawai, K., K. Shiokawa, Y. Otsuka, S. Oyama, M. G. Connors, Y. Kasahara, Y. Kasaba, S. Nakamura, F. Tsuchiya, A. Kumamoto, A. Shinbori, A. Matsuoka, I. Shinohara, and Y. Miyoshi

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS     2023.1

A statistical study of longitudinal extent of Pc1 pulsations using seven PWING ground stations at subauroral latitudes Invited Reviewed

(99) Liu, J., K. Shiokawa, S. Oyama, Y. Otsuka, C. W. Jun, M. Nose, T. Nagatsuma, K. Sakaguchi, A. Kadokura, M. Ozaki, M. Connors, D. Baishev, N. Nishitani, A. Oinats, V. Kurkin and T. Raita

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS     2023.1

Plasma-neutral gas interactions in various space environments: Assessment beyond simplified approximations as a Voyage 2050 theme

Yamauchi Masatoshi, De Keyser Johan, Parks George, Oyama Shin-ichiro, Wurz Peter, Abe Takumi, Beth Arnaud, Daglis Ioannis A., Dandouras Iannis, Dunlop Malcolm, Henri Pierre, Ivchenko Nickolay, Kallio Esa, Kucharek Harald, Liu Yong C-M, Mann Ingrid, Marghitu Octav, Nicolaou Georgios, Rong Zhaojin, Sakanoi Takeshi, Saur Joachim, Shimoyama Manabu, Taguchi Satoshi, Tian Feng, Tsuda Takuo, Tsurutani Bruce, Turner Drew, Ulich Thomas, Yau Andrew, Yoshikawa Ichiro

EXPERIMENTAL ASTRONOMY   Vol. 54 ( 2-3 ) page： 521 - 559   2022.12

Thermospheric wind response to a sudden ionospheric variation in the trough: event at a pseudo-breakup during geomagnetically quiet conditions Reviewed International coauthorship

Oyama, Si., Vanhamäki, H., Cai, L. et al.

Earth, Planets and Space   Vol. 74 ( 154 )   2022.10

Observation of Source Plasma and Field Variations of a Substorm Brightening Aurora at L similar to 6 by a Ground-Based Camera and the Arase Satellite on 12 October 2017

Chen L., Shiokawa K., Miyoshi Y., Oyama S., Jun C-W, Ogawa Y., Hosokawa K., Inaba Y., Kazama Y., Wang S. Y., Tam S. W. Y., Chang T. F., Wang B. J., Asamura K., Kasahara S., Yokota S., Hori T., Keika K., Kasaba Y., Kumamoto A., Tsuchiya F., Shoji M., Kasahara Y., Matsuoka A., Shinohara I, Imajo S., Nakamura S., Kitahara M.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 127 ( 11 )   2022.10

Slow Contraction of Flash Aurora Induced by an Isolated Chorus Element Ranging From Lower-Band to Upper-Band Frequencies in the Source Region

Ozaki Mitsunori, Yagitani Satoshi, Shiokawa Kazuo, Tanaka Yoshimasa, Ogawa Yasunobu, Hosokawa Keisuke, Kasahara Yoshiya, Ebihara Yusuke, Miyoshi Yoshizumi, Imamura Kousuke, Kataoka Ryuho, Oyama Shin-ichiro, Chida Teppei, Kadokura Akira

GEOPHYSICAL RESEARCH LETTERS   Vol. 49 ( 9 )   2022.5

Altitude of pulsating arcs as inferred from tomographic measurements

Safargaleev Vladimir, Sergienko Tima, Hosokawa Keisuke, Oyama Shin-ichiro, Ogawa Yasunobu, Miyoshi Yoshizumi, Kurita Satoshi, Fujii Ryochi

EARTH PLANETS AND SPACE   Vol. 74 ( 1 )   2022.2

Study of an Equatorward Detachment of Auroral Arc From the Oval Using Ground-Space Observations and the BATS-R-US-CIMI Model

Yadav Sneha, Shiokawa K., Oyama S., Inaba Y., Takahashi N., Seki K., Keika K., Chang Tzu-Fang, Tam S. W. Y., Wang B. J., Kazama Y., Wang S. Y., Asamura K., Kasahara S., Yokota S., Hori T., Kasaba Y., Tsuchiya F., Kumamoto A., Shoji M., Kasahara Y., Matsuoka A., Matsuda S., Jun C. W., Imajo S., Miyoshi Y., Shinohara I

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 126 ( 12 )   2021.12

Multipoint Measurement of Fine-Structured EMIC Waves by Arase, Van Allen Probe A, and Ground Stations

Matsuda S., Miyoshi Y., Kasahara Y., Blum L., Colpitts C., Asamura K., Kasaba Y., Matsuoka A., Tsuchiya F., Kumamoto A., Teramoto M., Nakamura S., Kitahara M., Shinohara I, Reeves G., Spence H., Shiokawa K., Nagatsuma T., Oyama S., Mann I. R.

GEOPHYSICAL RESEARCH LETTERS   Vol. 48 ( 23 )   2021.11

Simulated seasonal impact on middle atmospheric ozone from high-energy electron precipitation related to pulsating aurorae

Verronen Pekka T., Kero Antti, Partamies Noora, Szelag Monika E., Oyama Shin-Ichiro, Miyoshi Yoshizumi, Turunen Esa

ANNALES GEOPHYSICAE   Vol. 39 ( 5 ) page： 883 - 897   2021.10

Periodicities and Colors of Pulsating Auroras: DSLR Camera Observations From the International Space Station

Nanjo Sota, Hozumi Yuta, Hosokawa Keisuke, Kataoka Ryuho, Miyoshi Yoshizumi, Oyama Shin-ichiro, Ozaki Mitsunori, Shiokawa Kazuo, Kurita Satoshi

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 126 ( 10 )   2021.10

Isolated Proton Aurora Driven by EMIC Pc1 Wave: PWING, Swarm, and NOAA POES Multi-Instrument Observations

Kim Hyangpyo, Shiokawa Kazuo, Park Jaeheung, Miyoshi Yoshizumi, Miyashita Yukinaga, Stolle Claudia, Connor Hyunju Kim, Hwang Junga, Buchert Stephan, Kwon Hyuck-Jin, Nakamura Satoko, Nakamura Kohki, Oyama Shin-Ichiro, Otsuka Yuichi, Nagatsuma Tsutomu, Sakaguchi Kaori

GEOPHYSICAL RESEARCH LETTERS   Vol. 48 ( 18 )   2021.9

Simultaneous Pulsating Aurora and Microburst Observations With Ground-Based Fast Auroral Imagers and CubeSat FIREBIRD-II

Kawamura Miki, Sakanoi Takeshi, Fukizawa Mizuki, Miyoshi Yoshizumi, Hosokawa Keisuke, Tsuchiya Fuminori, Katoh Yuto, Ogawa Yasunobu, Asamura Kazushi, Saito Shinji, Spence Harlan, Johnson Arlo, Oyama Shin'ichiro, Brandstrom Urban

GEOPHYSICAL RESEARCH LETTERS   Vol. 48 ( 18 )   2021.9

First Simultaneous Observation of a Night Time Medium-Scale Traveling Ionospheric Disturbance From the Ground and a Magnetospheric Satellite

Kawai K., Shiokawa K., Otsuka Y., Oyama S., Kasaba Y., Kasahara Y., Tsuchiya F., Kumamoto A., Nakamura S., Matsuoka A., Imajo S., Kazama Y., Wang S-Y, Tam S. W. Y., Chang T. F., Wang B. J., Asamura K., Kasahara S., Yokota S., Keika K., Hori T., Miyoshi Y., Jun C., Shoji M., Shinohara I

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 126 ( 9 )   2021.9

Variations in Cosmic Noise Absorption in Association With Equatorward Development of the Pulsating Auroral Patch: A Case Study to Estimate the Energy Spectra of Auroral Precipitating Electrons

Miyamoto Taishiro, Oyama Shin-ichiro, Raita Tero, Hosokawa Keisuke, Miyoshi Yoshizumi, Ogawa Yasunobu, Kurita Satoshi

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 126 ( 9 )   2021.9

Penetration of MeV electrons into the mesosphere accompanying pulsating aurorae

Miyoshi Y., Hosokawa K., Kurita S., Oyama S. -I., Ogawa Y., Saito S., Shinohara I., Kero A., Turunen E., Verronen P. T., Kasahara S., Yokota S., Mitani T., Takashima T., Higashio N., Kasahara Y., Matsuda S., Tsuchiya F., Kumamoto A., Matsuoka A., Hori T., Keika K., Shoji M., Teramoto M., Imajo S., Jun C., Nakamura S.

SCIENTIFIC REPORTS   Vol. 11 ( 1 )   2021.7

Spatial Evolution of Wave-Particle Interaction Region Deduced From Flash-Type Auroras and Chorus-Ray Tracing

Ozaki Mitsunori, Inoue Tomohiro, Tanaka Yoshimasa, Yagitani Satoshi, Kasahara Yoshiya, Shiokawa Kazuo, Miyoshi Yoshizumi, Imamura Kousuke, Hosokawa Keisuke, Oyama Shin-ichiro, Kataoka Ryuho, Ebihara Yusuke, Ogawa Yasunobu, Kadokura Akira

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 126 ( 7 )   2021.7

Multi-event Analysis of Plasma and Field Variations in Source of Stable Auroral Red (SAR) Arcs in Inner Magnetosphere during Non-storm-time Substorms Reviewed International coauthorship

Inaba, Y., K. Shiokawa1, S. Oyama et al.

Journal of Geophysical Research: Space Physics   Vol. 126 ( 4 )   2021.4

Over-darkening of pulsating aurora Reviewed International journal

Hosokawa, K., Y. Miyoshi, S.-I. Oyama, Y. Ogawa, S. Kurita, Y. Kasahara, Y. Kasaba, S. Yagitani, S. Matsuda, M. Ozaki, F. Tsuchiya, A. Kumamoto, T. Takashima, I. Shinohara, and R. Fujii

Journal of Geophysical Research: Space Physics   Vol. 126 ( 4 )   2021.4

Formation of an additional density peak in the bottom side of the sodium layer associated with the passage of multiple mesospheric frontal systems Reviewed International coauthorship

Narayanan Viswanathan Lakshmi, Nozawa Satonori, Oyama Shin-Ichiro, Mann Ingrid, Shiokawa Kazuo, Otsuka Yuichi, Saito Norihito, Wada Satoshi, Kawahara Takuya D., Takahashi Toru

ATMOSPHERIC CHEMISTRY AND PHYSICS   Vol. 21 ( 4 ) page： 2343 - 2361   2021.2

Study of Spatiotemporal Development of Global Distribution of Magnetospheric ELF/VLF Waves Using Ground-Based and Satellite Observations, and RAM-SCB Simulations, for the March and November 2017 Storms

Takeshita Yuhei, Shiokawa Kazuo, Miyoshi Yoshizumi, Ozaki Mitsunori, Kasahara Yoshiya, Oyama Shin-ichiro, Connors Martin, Manninen Jyrki, Jordanova Vania K., Baishev Dmitry, Oinats Alexey, Kurkin Vladimir

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 126 ( 2 )   2021.2

OI 630.0-nm and N-2 1PG Emissions in Pulsating Aurora Events Observed by an Optical Spectrograph at Tromso, Norway Reviewed International coauthorship

Tsuda T. T., Li C., Hamada S., Hosokawa K., Oyama S. -I., Nozawa S., Kawabata T., Mizuno A., Kurihara J., Nishiyama T., Kosch M. J.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 125 ( 12 )   2020.12

Relativistic Electron Microbursts as High-Energy Tail of Pulsating Aurora Electrons Reviewed

Miyoshi Y., Saito S., Kurita S., Asamura K., Hosokawa K., Sakanoi T., Mitani T., Ogawa Y., Oyama S., Tsuchiya F., Jones S. L., Jaynes A. N., Blake J. B.

GEOPHYSICAL RESEARCH LETTERS   Vol. 47 ( 21 )   2020.11

An Ephemeral Red Arc Appeared at 68 degrees MLat at a Pseudo Breakup During Geomagnetically Quiet Conditions Reviewed International coauthorship

Oyama S., Shinbori A., Ogawa Y., Kellinsalmi M., Raita T., Aikio A., Vanhamaeki H., Shiokawa K., Virtanen I., Cai L., Workayehu A. B., Pedersen M., Kauristie K., Tsuda T. T., Kozelov B., Demekhov A., Yahnin A., Tsuchiya F., Kumamoto A., Kasahara Y., Matsuoka A., Shoji M., Teramoto M., Lester M.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 125 ( 10 )   2020.10

Plasma and Field Observations in the Magnetospheric Source Region of a Stable Auroral Red (SAR) Arc by the Arase Satellite on 28 March 2017 Reviewed

Inaba Yudai, Shiokawa Kazuo, Oyama Shin-ichiro, Otsuka Yuichi, Oksanen Arto, Shinbori Atsuki, Gololobov Artem Yu, Miyoshi Yoshizumi, Kazama Yoichi, Wang Shiang-Yu, Tam Sunny W. Y., Chang Tzu-Fang, Wang Bo-Jhou, Yokota Shoichiro, Kasahara Satoshi, Keika Kunihiro, Hori Tomoaki, Matsuoka Ayako, Kasahara Yoshiya, Kumamoto Atsushi, Kasaba Yasumasa, Tsuchiya Fuminori, Shoji Masafumi, Shinohara Iku, Stolle Claudia

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 125 ( 10 )   2020.10

Estimation of the emission altitude of pulsating aurora using the five-wavelength photometer Reviewed

Kawamura Yuki, Hosokawa Keisuke, Nozawa Satonori, Ogawa Yasunobu, Kawabata Tetsuya, Oyama Shin-Ichiro, Miyoshi Yoshizumi, Kurita Satoshi, Fujii Ryoichi

EARTH PLANETS AND SPACE   Vol. 72 ( 1 )   2020.7

Development of low-cost multi-wavelength imager system for studies of aurora and airglow Reviewed

Ogawa Y., Tanaka Y., Kadokura A., Hosokawa K., Ebihara Y., Motoba T., Gustaysson B., Brandstrom U., Sato Y., Oyama S., Ozaki M., Raita T., Sigernes F., Nozawa S., Shiokawa K., Kosch M., Kauristie K., Hall C., Suzuki S., Miyoshi Y., Gerrard A., Miyaoka H., Fujii R.

POLAR SCIENCE   Vol. 23   2020.3

Multievent Analysis of Oscillatory Motion of Medium-Scale Traveling Ionospheric Disturbances Observed by a 630-nm Airglow Imager Over Tromso Reviewed

Yadav Sneha, Shiokawa K., Oyama S., Otsuka Y.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 125 ( 3 )   2020.3

Fine-Scale Visualization of Aurora in a Wide Area Using Color Digital Camera Images From the International Space Station Reviewed

Nanjo Sota, Hozumi Yuta, Hosokawa Keisuke, Kataoka Ryuho, Miyoshi Yoshizumi, Oyama Shin-ichiro, Ozaki Mitsunori, Shiokawa Kazuo, Kurita Satoshi

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 125 ( 3 )   2020.3

Multiple time-scale beats in aurora: precise orchestration via magnetospheric chorus waves Reviewed

Hosokawa K., Miyoshi Y., Ozaki M., Oyama S- I, Ogawa Y., Kurita S., Kasahara Y., Kasaba Y., Yagitani S., Matsuda S., Tsuchiya F., Kumamoto A., Kataoka R., Shiokawa K., Raita T., Turunen E., Takashima T., Shinohara I, Fujii R.

SCIENTIFIC REPORTS   Vol. 10 ( 1 )   2020.2

Potential for the measurement of mesosphere and lower thermosphere (MLT) wind, temperature, density and geomagnetic field with Superconducting Submillimeter-Wave Limb-Emission Sounder 2 (SMILES-2) Reviewed

Baron Philippe, Ochiai Satoshi, Dupuy Eric, Larsson Richard, Liu Huixin, Manago Naohiro, Murtagh Donal, Oyama Shin-ichiro, Sagawa Hideo, Saito Akinori, Sakazaki Takatoshi, Shiotani Masato, Suzuki Makoto

ATMOSPHERIC MEASUREMENT TECHNIQUES   Vol. 13 ( 1 ) page： 219 - 237   2020.1

Diffuse and Pulsating Aurora Reviewed

Nishimura Yukitoshi, Lessard Marc R., Katoh Yuto, Miyoshi Yoshizumi, Grono Eric, Partamies Noora, Sivadas Nithin, Hosokawa Keisuke, Fukizawa Mizuki, Samara Marilia, Michell Robert G., Kataoka Ryuho, Sakanoi Takeshi, Whiter Daniel K., Oyama Shin-ichiro, Ogawa Yasunobu, Kurita Satoshi

SPACE SCIENCE REVIEWS   Vol. 216 ( 1 )   2020.1

Longitudinal Extent of Magnetospheric ELF/VLFWaves using Multipoint PWING Ground Stations at Subauroral Latitudes Reviewed

Takeshita Yuhei, Shiokawa Kazuo, Ozaki Mitsunori, Manninen Jyrki, Oyama Shin-Ichiro, Connors Martin, Baishev Dmitry, Kurkin Vladimir, Oinats Alexey

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 124 ( 12 ) page： 9881 - 9892   2019.12

Ground Echoes Observed by the Meteor Radar and High-Speed Auroral Observations in the Substorm Growth Phase Reviewed

Kozlovsky A., Shalimov S., Oyama S., Hosokawa K., Lester M., Ogawa Y., Hall C.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS     2019.11

High-latitude thermospheric wind study using a Fabry-Perot interferometer at Tromso in Norway: averages and variations during quiet times Reviewed

Xu Heqiucen, Shiokawa Kazuo, Oyama Shin-ichiro, Nozawa Satonori

EARTH PLANETS AND SPACE   Vol. 124 ( 11 ) page： 9278 - 9292   2019.11

Thermospheric wind variations observed by a Fabry-Perot interferometer at Tromso, Norway, at substorm onsets Reviewed

Xu Heqiucen, Shiokawa Kazuo, Oyama Shin-ichiro, Otsuka Yuichi

EARTH PLANETS AND SPACE   Vol. 71 ( 1 )   2019.10

Fabry-Perot Interferometer Observations of Thermospheric Horizontal Winds During Magnetospheric Substorms Reviewed

Cai L., Oyama S., Aikio A., Vanhamaki H., Virtanen I

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 71 ( 1 )   2019.8

Tracking the Region of High Correlation Between Pulsating Aurora and Chorus: Simultaneous Observations With Arase Satellite and Ground-Based All-Sky Imager in Russia Reviewed

Kawamura S., Hosokawa K., Kurita S., Oyama S., Miyoshi Y., Kasahara Y., Ozaki M., Matsuda S., Matsuoka A., Kozelov B., Kawamura Y., Shinohara I

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS     2019.8

Visualization of rapid electron precipitation via chorus element wave-particle interactions Reviewed

Ozaki Mitsunori, Miyoshi Yoshizumi, Shiokawa Kazuo, Hosokawa Keisuke, Oyama Shin-ichiro, Kataoka Ryuho, Ebihara Yusuke, Ogawa Yasunobu, Kasahara Yoshiya, Yagitani Satoshi, Kasaba Yasumasa, Kumamoto Atsushi, Tsuchiya Fuminori, Matsuda Shoya, Katoh Yuto, Hikishima Mitsuru, Kurita Satoshi, Otsuka Yuichi, Moore Robert C., Tanaka Yoshimasa, Nose Masahito, Nagatsuma Tsutomu, Nishitani Nozomu, Kadokura Akira, Connors Martin, Inoue Takumi, Matsuoka Ayako, Shinohara Iku

NATURE COMMUNICATIONS   Vol. 124 ( 5 )   2019.5

A PROPOSAL FOR SATELLITE OBSERVATION OF THE WHOLE ATMOSPHERE - SUPERCONDUCTING SUBMILLIMETER-WAVE LIMB-EMISSION SOUNDER (SMILES-2) Reviewed

Shiotani M., Saito A., Sakazaki T., Ochiai S., Baron P., Nishibori T., Suzuki M., Abe T., Maezawa H., Oyama S.

2019 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS 2019)   Vol. 124 ( 5 ) page： 3709 - 3728   2019.5

Spatiotemporal development of pulsating auroral patch associated with discrete chorus elements: Arase and PWING observations Reviewed

Ozaki M., Shiokawa K., Miyoshi Y., Hosokawa K., Oyama S., Yagitani S., Kasahara Y., Kasaba Y., Matsuda S., Kataoka R., Ebihara Y., Ogawa Y., Otsuka Y., Kurita S., Moore R. C., Tanaka Y. -M., Nose M., Nagatsuma T., Connors M., Nishitani N., Hikishima M., Kumamoto A., Tsuchiya F., Kadokura A., Nishiyama T., Inoue T., Imamura K., Matsuoka A., Shinohara I.

2019 URSI ASIA-PACIFIC RADIO SCIENCE CONFERENCE (AP-RASC)   Vol. 124 ( 4 ) page： 2769 - 2778   2019.4

Rapid Loss of Relativistic Electrons by EMIC Waves in the Outer Radiation Belt Observed by Arase, Van Allen Probes, and the PWING Ground Stations Reviewed

Kurita S., Miyoshi Y., Shiokawa K., Higashio N., Mitani T., Takashima T., Matsuoka A., Shinohara I., Kletzing C. A., Blake J. B., Claudepierre S. G., Connors M., Oyama S., Nagatsuma T., Sakaguchi K., Baishev D., Otsuka Y.

GEOPHYSICAL RESEARCH LETTERS   Vol. 10 ( 257 )   2019.1

Electrostatic Electron Cyclotron Harmonic Waves as a Candidate to Cause Pulsating Auroras Reviewed

Fukizawa M., Sakanoi T., Miyoshi Y., Hosokawa K., Shiokawa K., Katoh Y., Kazama Y., Kumamoto A., Tsuchiya F., Miyashita Y., Tanaka Y-M., Kasahara Y., Ozaki M., Matsuoka A., Matsuda S., Hikishima M., Oyama S., Ogawa Y., Kurita S., Fujii R.

GEOPHYSICAL RESEARCH LETTERS     page： 8788 - 8791   2019

Microscopic Observations of Pulsating Aurora Associated With Chorus Element Structures: Coordinated Arase Satellite-PWING Observations Reviewed

Ozaki M., Shiokawa K., Miyoshi Y., Hosokawa K., Oyama S., Yagitani S., Kasahara Y., Kasaba Y., Matsuda S., Kataoka R., Ebihara Y., Ogawa Y., Otsuka Y., Kurita S., Moore R. C., Tanaka Y. -M., Nose M., Nagatsuma T., Connors M., Nishitani N., Katoh Y., Hikishima M., Kumamoto A., Tsuchiya F., Kadokura A., Nishiyama T., Inoue T., Imamura K., Matsuoka A., Shinohara I.

GEOPHYSICAL RESEARCH LETTERS     2019

Height-dependent ionospheric variations in the vicinity of nightside poleward expanding aurora after substorm onset Reviewed

Oyama, S., Y. Miyoshi, K. Shiokawa, J. Kurihara, T. T. Tsuda, and B. J. Watkins

J. Geophys. Res. Space Physics   Vol. 45 ( 23 ) page： 12720 - 12729   2018.12

Generation of atmospheric gravity waves in the polar thermosphere in response to auroral activity Reviewed

Oyama, S., and B. J. Watkins

Space Science Review   Vol. 45 ( 23 ) page： 12661 - 12668   2018.12

Variance of the vertical ion speed measured with the EISCAT UHF radar in the polar lower ionosphere at Tromsoe, Norway Reviewed

Oyama, S., A. Brekke, T. T. Tsuda, J. Kurihara, and B. J. Watkins

J. Geophys. Res.   Vol. 45 ( 22 ) page： 12125 - 12134   2018.11

Purple Auroral Rays and Global Pc1 Pulsations Observed at the CIR-Associated Solar Wind Density Enhancement on 21 March 2017 Reviewed

Shiokawa K., Ozaki M., Kadokura A., Endo Y., Sakanoi T., Kurita S., Miyoshi Y., Oyama S. -I., Connors M., Schofield I., Ruohoniemi J. M., Nose M., Nagatsuma T., Sakaguchi K., Baishev D. G., Pashinin A., Rakhmatulin R., Shevtsov B., Poddelsky I., Engebretson M., Raita Tero, Tanaka Y. -M., Shinohara M., Teramoto M., Nomura R., Fujimoto A., Matsuoka A., Higashio N., Takashima T., Shinohara I., Albert Jay M.

GEOPHYSICAL RESEARCH LETTERS   Vol. 45 ( 20 ) page： 10819-10828   2018.10

Auroral molecular-emission effects on the atomic oxygen line at 777.4nm Reviewed

Oyama Shin-ichiro, Tsuda Takuo T., Hosokawa Keisuke, Ogawa Yasunobu, Miyoshi Yoshizumi, Kurita Satoshi, Kero Antti E., Fujii Ryoichi, Tanaka Yoshimasa, Mizuno Akira, Kawabata Tetsuya, Gustavsson Bjorn, Leyser Thomas

EARTH PLANETS AND SPACE   Vol. 70   2018.10

Survey of conditions for artificial aurora experiments by the second electron gyro-harmonic at EISCAT Tromso using dynasonde data Reviewed

Tsuda T. T., Rietveld M. T., Kosch M. J., Oyama S., Ogawa Y., Hosokawa K., Nozawa S., Kawabata T., Mizuno A.

EARTH PLANETS AND SPACE   Vol. 70   2018.6

Survey of conditions for artificial aurora experiments at EISCAT Tromso using dynasonde data Reviewed

Tsuda T. T., Rietveld M. T., Kosch M. J., Oyama S., Hosokawa K., Nozawa S., Kawabata T., Mizuno A., Ogawa Y.

EARTH PLANETS AND SPACE   Vol. 70   2018.3

Ground-based instruments of the PWING project to investigate dynamics of the inner magnetosphere at subauroral latitudes as a part of the ERG-ground coordinated observation network Reviewed

Shiokawa Kazuo, Katoh Yasuo, Hamaguchi Yoshiyuki, Yamamoto Yuka, Adachi Takumi, Ozaki Mitsunori, Oyama Shin-Ichiro, Nose Masahito, Nagatsuma Tsutomu, Tanaka Yoshimasa, Otsuka Yuichi, Miyoshi Yoshizumi, Kataoka Ryuho, Takagi Yuki, Takeshita Yuhei, Shinbori Atsuki, Kurita Satoshi, Hori Tomoaki, Nishitani Nozomu, Shinohara Iku, Tsuchiya Fuminori, Obana Yuki, Suzuki Shin, Takahashi Naoko, Seki Kanako, Kadokura Akira, Hosokawa Keisuke, Ogawa Yasunobu, Connors Martin, Ruohoniemi J. Michael, Engebretson Mark, Turunen Esa, Ulich Thomas, Manninen Jyrki, Raita Tero, Kero Antti, Oksanen Arto, Back Marko, Kauristie Kirsti, Mattanen Jyrki, Baishev Dmitry, Kurkin Vladimir, Oinats Alexey, Pashinin Alexander, Vasilyev Roman, Rakhmatulin Ravil, Bristow William, Karjala Marty

EARTH PLANETS AND SPACE   Vol. 69   2017.11

Simultaneous FPI and TMA Measurements of the Lower Thermospheric Wind in the Vicinity of the Poleward Expanding Aurora After Substorm Onset Reviewed

Oyama Shin-ichiro, Kubota Ken, Morinaga Takatoshi, Tsuda Takuo T., Kurihara Junichi, Larsen Miguel F., Yamamoto Masayuki, Cai Lei

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 122 ( 10 ) page： 10864-10875   2017.10

Energetic electron precipitation and auroral morphology at the substorm recovery phase Reviewed

Oyama S., Kero A., Rodger C. J., Clilverd M. A., Miyoshi Y., Partamies N., Turunen E., Raita T., Verronen P. T., Saito S.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS   Vol. 122 ( 6 ) page： 6508-6527   2017.5

Measurement of thermospheric temperatures using OMTI Fabry-Perot interferometers with 70-mm etalon Reviewed

Nakamura Y., Shiokawa K., Otsuka Y., Oyama S., Nozawa S., Komolmis T., Komonjida S., Neudegg Dave, Yuile Colin, Meriwether J., Shinagawa H., Jin H.

EARTH PLANETS AND SPACE   Vol. 69   2017.4

Mesospheric ozone destruction by high-energy electron precipitation associated with pulsating aurora Reviewed

Turunen, E., A. Kero, P. T. Verronen, Y. Miyoshi, S.-I. Oyama, and S. Saito

J. Geophys. Res. Atmos.     2016.9

Thermospheric Nocturnal Wind Climatology Observed by Fabry-Perot Interferometers over the Asia-Oceania Region Reviewed

Yatagai, A., and S. Oyama

J. Meteorol. Soc. Japan     2016.8

Lower thermospheric wind variations in auroral patches during the substorm recovery phase Reviewed

Shin-ichiro Oyama, Kazuo Shiokawa, Yoshizumi Miyoshi, Keisuke Hosokawa, Brenton J. Watkins, Junichi Kurihara, Takuo T. Tsuda andChristopher T. Fallen

J. Geophys. Res., Space Physics   Vol. 121 ( 4 ) page： 3564-3577   2016.5

Relation between fine structure of energy spectra for pulsating aurora electrons and frequency spectra of whistler mode chorus waves Reviewed

Miyoshi, Y., S. Saito, K. Seki, T. Nishiyama, R. Kataoka, K. Asamura, Y. Katoh, Y. Ebihara, T. Sakanoi, M. Hirahara, S. Oyama, S. Kurita, and O. Santolik

J. Geophys. Res. Space Physics     2015.8

A case study on generation mechanisms of a sporadic sodium layer above Tromsoe (69.6N) during a night of high auroral activity Reviewed

Takahashi, T., Nozawa, S., Tsuda, T. T., Ogawa, Y., Saito, N., Hidemori, T., Kawahara, T. D., Hall, C., Fujiwara, H., Matuura, N., Brekke, A., Tsutsumi, M., Wada, S., Kawabata, T., Oyama, S., and Fujii, R

Ann. Geophys.     2015.8

Statistical study of auroral fragmentation into patches Reviewed

Hashimoto, A., K. Shiokawa, Y. Otsuka, S.-i. Oyama, S. Nozawa, T. Hori, M. Lester, and M. G. Johnsen

J. Geophys. Res. Space Physics     2015.7

Energetic electron precipitation associated with pulsating aurora: EISCAT and Van Allen Probe observations Reviewed

Miyoshi, Y., S. Oyama, S. Saito, S. Kurita, H. Fujiwara, R. Kataoka, Y. Ebihara, C. Kletzing, G. Reeves, O. Santolik, M. Cliverd, C. J. Rodger, E. Turunen, and F. Tsuchiya

J. Geophys. Res. Space Physics     2015.3

Approximate forms of daytime ionospheric conductance Reviewed

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

J. Geophys. Res. Space Physics     2014.11

A case study of gravity wave dissipation in the polar MLT region using sodium LIDAR and radar data Reviewed

Takahashi, T., S. Nozawa, M. Tsutsumi, C. Hall, S. Suzuki, T. T. Tsuda, T. D. Kawahara, N. Saito, S. Oyama, S. Wada, T. Kawabata, H. Fujiwara, A. Brekke, A. Manson, C. Meek, and R. Fujii

Ann. Geophys.     2014.10

Auroral fragmentation into patches Reviewed

Shiokawa, K., A. Hashimoto, T. Hori, K. Sakaguchi, Y. Ogawa, E. Donovan, E. Spanswick, M. Connors, Y. Otsuka, S. Oyama, S. Nozawa, and K. McWilliams

J. Geophys. Res. Space Physics     2014.9

Height‐dependent ionospheric variations in the vicinity of nightside poleward expanding aurora after substorm onset Reviewed

Oyama, S., Y. Miyoshi, K. Shiokawa, J. Kurihara, T. T. Tsuda, and B. J. Watkins

  Vol. 119   2014.5

Decrease in sodium density observed during auroral particle precipitation over Tromsoe, Norway Reviewed

Tsuda, T., S. Nozawa, T. D. Kawahara, T. Kawabata, N. Saito, S. Wada, Y. Ogawa, S. Oyama, C. M. Hall, M. Tsutsumi, M. K. Ejiri, S. Suzuki, T. Takahashi, T. Nakamura

Geophys. Res. Let.     2013.8

Observation of nighttime medium-scale travelling ionospheric disturbances by two 630-nm airglow imagers near the auroral zone Reviewed

Shiokawa, K., M. Mori, Y. Otsuka, S. Oyama, S. Nozawa, S. Suzuki, and M. Connors

J. Atmos. Solar-Terr. Phys.     2013.4

Estimation of the layered ionospheric conductance using data from a multi-wavelength photometer at the European Incoherent Scatter (EISCAT) radar site Reviewed

Oyama, S., T. Watanabe, R. Fujii, S. Nozawa1, and T. T. Tsuda

Antarctic Record   Vol. 57 ( 3 ) page： 339-356   2013

Development of low-cost sky-scanning Fabry-Perot interferometers for airglow and auroral studies Reviewed

Shiokawa, K., Y. Otsuka, S. Oyama, S. Nozawa, M. Satoh, Y. Katoh, Y. Hamaguchi, Y. Yamamoto, and J. Meriwether

Earth Planets Space     2012.11

Motion of high-latitude nighttime medium-scale traveling ionospheric disturbances associated with auroral brightening Reviewed

Shiokawa, K., M. Mori, Y. Otsuka, S. Oyama, and S. Nozawa

J. Geophys. Res.     2012.10

Mean winds, tides, and quasi-2 day waves above Bear Island Reviewed

Nozawa, S., C. M. Hall, M. Tsutsumi, A. Brekke, Y. Ogawa, T. T. Tsuda, S. Oyama, and R. Fujii

J. Atmos. Solar-Terr. Phys.     2012.5

Temporal variations of the ion-neutral collision frequency from EISCAT observations in the polar lower ionosphere during periods of geomagnetic disturbances Reviewed

Oyama, S., J. Kurihara, B. J. Watkins, T. T. Tsuda, and T. Takahashi

J. Geophys. Res.   Vol. 117 ( A05308 )   2012.3

Generation of atmospheric gravity waves in the polar thermosphere in response to auroral activity Reviewed

Oyama, S., and B. J. Watkins

Space Science Review     2011.10

Fine structure of sporadic sodium layer observed with a sodium lidar at Tromsoe, Norway Reviewed

Tsuda, T. T., S. Nozawa, T. Kawahara, T. Kawabata, N. Saito, S. Wada, C. Hall, S. Oyama, Y. Ogawa, S. Suzuki, T. Ogawa, T. Takahashi, H. Fujiwara, R. Fujii, N. Matuura, and A. Brekke

Geophys. Res. Lett.     2011.9

Variance of the vertical ion speed measured with the EISCAT UHF radar in the polar lower ionosphere at Tromsoe, Norway Reviewed

Oyama, S., A. Brekke, T. T. Tsuda, J. Kurihara, and B. J. Watkins

J. Geophys. Res.   Vol. 116 ( A00K06 )   2011.7

Lower-thermospheric wind fluctuations measured with an FPI during pulsating aurora at Tromsø, Norway Reviewed

S. Oyama, K. Shiokawa, J. Kurihara, T. T. Tsuda, S. Nozawa, Y. Ogawa, Y. Otsuka, and B. J. Watkins

Ann. Geophysicae   Vol. 28   page： 1847-1857   2010.10

Tidal waves in the polar lower thermosphere observed using the EISCAT long run data set obtained in September 2005 Reviewed

Nozawa, S., Y. Ogawa, S. Oyama, H. Fujiwara, T. Tsuda, A. Brekke, C. M. Hall, Y. Murayama, S. Kawamura, H. Miyaoka, and R. Fujii

J. Geophy. Res.     2010.8

Links between a stratospheric sudden warming and thermal structures and dynamics in the high-latitude mesosphere, lower thermosphere, and ionosphere Reviewed

Kurihara, J., Y. Ogawa, S. Oyama, S. Nozawa , M. Tsutsumi , C. Hall , Y. Tomikawa , R. Fujii

Geophys. Res. Lett.     2010.7

Temperature enhancements and vertical winds in the lower thermosphere associated with auroral heating during the Dynamics and Energetics of the Lower Thermosphere in Aurora (DELTA) campaign Reviewed

Kurihara, J., S. Oyama, S. Nozawa, T. T. Tsuda, R. Fujii, Y. Ogawa, H. Miyaoka, N. Iwagami, T. Abe, K.-I. Oyama, M. Kosch, A. Aruliah, E. Griffin, and K. Kauristie

J. Geophys. Res.     2009.12

Ion heating in high-speed flow channel within the duskside cell of the polar-cap ion convection under large IMF-By condition Reviewed

Maeda, S., Y. Ogawa, K. Hosokawa, S. Nozawa, S. Oyama, T. Tsuda and A. Brekke

J. Geophysical Research     2009.11

Relations between proton auroras, intense electric field and ionospheric electron density depletion Reviewed

Fujii, R., Y. Iwata, S. Oyama, S. Nozawa, and Y. Ogawa

J. Geophysical Research     page： 114, A09304, doi:10.1029/2009JA014319   2009.9

Spatial evolution of frictional heating and the predicted thermospheric-wind effects in the vicinity of an auroral arc measured with the Sondrestrom incoherent-scatter radar and the Reimei satellite Reviewed

Oyama, S., T. T. Tsuda, T. Sakanoi, Y. Obuchi, K. Asamura, M. Hirahara, A. Yamazaki, Y. Kasaba, R. Fujii, S. Nozawa, and B. J. Watkins

J. Geophysical Research   Vol. 114 ( A07311 ) page： doi:10.1029/2009JA014091   2009.7

Acceleration mechanism of high-speed neutral wind observed in the polar lower thermosphere Reviewed

Tsuda, T. T., S. Nozawa, S. Oyama, T. Motoba, Y. Ogawa, H. Shinagawa, N. Nishitani, K. Hosokawa, N. Sato, M. Lester, and R. Fujii

J. Geophysical Research     2009.4

*Generation of the lower-thermospheric vertical wind estimated with the EISCAT KST radar at high latitudes during periods of moderate geomagnetic disturbance Reviewed

Oyama, S., B. J. Watkins, S. Maeda, H. Shinagawa, S. Nozawa, Y. Ogawa, A. Brekke, C. Lathuillere, and W. Kofman

Ann. Geophysicae   Vol. 26   page： 1491-1505   2008.6

Excitation and diagnosis of cascading Langmuir waves in ionospheric plasmas at Gakona, Alaska, Reviewed

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

Phys. Scr.     2008

Temporal evolution of pump beam self-focusing at the High-Frequency Active Auroral Research Program Reviewed

Kosch M. J., T. Pedersen, E. Mishin, M. Starks, E. Gerken-Kendall, D. Sentman, S. Oyama, B. Watkins

J. Geophysical Research     2007.8

Coordinated optical and radar observations of ionospheric pumping for a frequency pass through the second electron gyroharmonic at HAARP Reviewed

Kosch M. J., T. Pedersen, E. Mishin, S. Oyama, J. Hughes, A. Senior, B. Watkins, B. Bristow

J. Geophysical Research     2007.6

A two-dimensional simulation of thermospheric vertical winds in the vicinity of an auroral arc Reviewed

Shinagawa, H., and Oyama, S

Earth Planets and Space   Vol. 58 ( 9 ) page： 58(9), 1173-1181   2006.9

Persistent enhancement of the HF pump-induced plasma line measured with a UHF diagnostic radar at HAARP Reviewed

Oyama, S., B. J. Watkins, F. T. Djuth, M. J. Kosch, P. Bernhardt, and C. J. Heinselman

J. Geophysical Research   Vol. 111 ( A06309 ) page： 2005JA011363   2006.6

*Application of a new beam configuration to estimate lower thermospheric vertical velocities at high latitudes with mono-static incoherent scatter radars Reviewed

Oyama, S., B. J. Watkins, S. Maeda, and J. Watermann

Radio Science   Vol. 40 ( RS4005 ) page： 2004RS003205   2005.7

*Vertical ion motions observed with incoherent-scatter radars in the polar lower ionosphere Reviewed

Oyama, S., B. J. Watkins, S. Nozawa, S. Maeda, and M. Conde

J. Geophysical Research   Vol. 110 ( A04302 ) page： 2004JA010705   2005.4

Summer-winter dependences of day-night differences in the ion temperature in the polar upper F region Reviewed

Oyama, S., C. Lathuillere, S. Maeda, and B. J. Watkins

Geophysical Research Letter   Vol. 31 ( L05806 ) page： 2003GL018820   2004.3

The quasi 2-day wave observed in the polar mesosphere (2): Comparison of the characteristics observed at Tromso and Poker Flat Reviewed

Nozawa, S., H. Iwahashi, A. Brekke, C. M. Hall, C. Meek, A. Manson, S. Oyama, Y. Murayama, and R. Fujii

J. Geophysical Research     page： 108 , 101029/2002JD003221   2003.12

Thermospheric and ionosphric dynamics in the auroral region Reviewed

Shinagawa, H., S. Oyama, S. Nozawa, S. C. Buchert, R. Fujii, and M. Ishii

Advances in Space Research   Vol. 31 ( 4 ) page： 951-956   2003.9

Field-aligned ion motions in the polar E-F transition region: Mean characteristics Reviewed

Oyama, S., S. Nozawa, S. Maeda, Y. Murayama, R. Fujii, and H. Shinagawa

J. Geophysical Research     page： 108(A8), 1334, doi:10.1029/2003JA009830   2003.8

The quasi 2-day wave observed in the polar mesosphere Reviewed

Nozawa, S., S. Imaida, A. Brekke, C. Hall, C. Meek, A. Manson, S. Oyama, K. Dobashi, and R. Fujii

J. Geophysical Research     page： 108, 10.1029/2002JD002440   2003.1

A comparison study of the auroral lower thermopsheric neutral winds derived by the EISCAT UHF radar and the Tromso MF radar Reviewed

Nozawa, S., A. Brekke, A. Manson, C. M. Hall, C. Meek, K. Morise, S. Oyama, K. Dobashi, and R. Fujii

J. Geophysical Research     page： 107, 10.1029/2000JA007581   2002.8

Field-aligned ion motions in the E and F region Reviewed

Fujii, R., S. Oyama, S. C. Buchert, S. Nozawa, and N. Matuura

J. Geophysical Research     page： 107, 10.1029/ 2001JA900148   2002.5

Effects of auroral arc on the generation of atmospheric gravity waves in the polar F-region Reviewed

Oyama, S., H. Shinagawa, S. C. Buchert, R. Fujii, S. Nozawa, M. Ishii, Y, Murayama, and W. Kofman

Advances in Space Res.   Vol. 27   page： 1767-1772   2001.10

*Generation of atmospheric gravity waves associated with auroral activity in the polar F region Reviewed

Oyama, S., M. Ishii, Y. Murayama, H. Shinagawa, S. C. Buchert, S. Nozawa, R. Fujii, and W. Kofman

J. Geophysical Research   Vol. 106   page： 18,543-18,554   2001.2

Effects of atmospheric oscillations on the field-aligned ion motions in the polar F-region Reviewed

Oyama, S., S. Nozawa, S. C. Buchert, M. Ishii, S. Watari, E. Sagawa, W. Kofman, J. Lilensten, and R. Fujii

Ann. Geophysicae   Vol. 18   page： 1154-1163   2000.9

Dynamics of neutral wind in the polar region observed with two Fabry-Perot interferometers Reviewed

Ishii, M., S. Oyama, S. Nozawa, R. Fujii, E. Sagawa, S. Watari, and H. Shinagawa

Earth Planets and Space   Vol. 51   page： 833-844   1999.8

What can we learn from the quiet high-latitude ionosphere? International coauthorship International conference

Oyama, S., H. Vanhamäki, L. Cai, A. Aikio, M. Rietveld, Y. Ogawa, T. Raita, M. Kellinsalmi, K. Kauristie, B. Kozelov, A. Shinbori, K. Shiokawa, T. T. Tsuda and T. Sakanoi

JpGU 2022 

地磁気静穏時のサブオーロラ帯における熱圏風加速

大山伸一郎、細川敬祐、坂野井健、塩川和夫、西谷望、新堀淳樹、小川泰信

EISCAT研究集会  2022.3.25 

What can we learn from the quiet high-latitude ionosphere? Invited International conference

Oyama, Shin-ichiro

45th Apatity Annual Meeting 

地磁気静穏時のサブオーロラ帯における熱圏風加速

大山伸一郎、細川敬祐、坂野井健、塩川和夫、西谷望、新堀淳樹、小川泰信

極域・中緯度SuperDARN研究集会  2022.2.22 

International joint observations of electron precipitation from Geospace using combined radio and optical techniques

Oyama, S., K. Hosokawa, C. Maltinez and Y. Tanaka

SDI-3D and collaborations with ground-based instruments in Fennoscandia International coauthorship International conference

Oyama, S., SDI-3D project team and JSPS Kokusai-B team

SGO Observatory Days 

Delay of the thermospheric wind response to a sudden westward turning of the ionospheric velocity at a pseudo breakup and irresistible force of the thermosphere in the energy dissipation process

Oyama, S., H. Vanhamäki, L. Cai, A. Aikio, M. Rietveld, Y. Ogawa, T. Raita, M. Kellinsalmi, K. Kauristie, B. Kozelov, A. Shinbori, , K. Shiokawa, T. T. Tsuda and T. Sakanoi

AGU Fall Meeting 

Thermospheric wind response to ionospheric variations at a pseudo breakup during geomagnetically quiet conditions

Oyama, S., H. Vanhamäki, L. Cai, A. Aikio, M. Rietveld, Y. Ogawa, T. Raita, M. Kellinsalmi, K. Kauristie, B. Kozelov, A. Shinbori, , K. Shiokawa, T. T. Tsuda and T. Sakanoi

A case study to estimate energy spectra of pulsating auroral electrons from cosmic noise absorption and auroral brightness International coauthorship International conference

Shin-ichiro Oyama, Miyamoto Taishiro, Tero Raita, Keisuke Hosokawa, Yoshizumi Miyoshi, Yasunobu Ogawa, and Satoshi Kurita

JpGU 2021 

SDI-3D project International coauthorship

2021.3.17 

SDI-3D project Invited International coauthorship International conference

Shin-ichiro Oyama

44th Apatity Seminar  2021.3.18  Polar Geophysical Institute, Russia

A case study to estimate energy spectra of pulsating auroral electrons from cosmic noise absorption and auroral brightness International coauthorship International conference

Shin-ichiro Oyama, Miyamoto Taishiro, Tero Raita, Keisuke Hosokawa, Yoshizumi Miyoshi, Yasunobu Ogawa, and Satoshi Kurita

44th Apatity Seminar  2021.3.16  Polar Geophysical Institute, Russia

Event study of the M-I-T coupling in the ionospheric trough region for Kp = 0+ International coauthorship International conference

S. Oyama, 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

PWING-ERG workshop  2021.3.11 

Thermospheric wind acceleration in the ionospheric trough for Kp = 0+ Invited International coauthorship International conference

S. Oyama, 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

COSPAR 2021  2021.1.30  COSPAR

Variations of cosmic noise absorption in association with equatorward development of the pulsating auroral patch: A case study with the meridional riometer chain in Finland International coauthorship

Miyamoto Taishiro, Shin-ichiro Oyama, Tero Raita, Keisuke Hosokawa, Yoshizumi Miyoshi, Yasunobu Ogawa, and Satoshi Kurita

Variations of cosmic noise absorption in association with equatorward development of the pulsating auroral patch: A case study with the meridional riometer chain in Finland International coauthorship

Miyamoto Taishiro, Shin-ichiro Oyama, Tero Raita, Keisuke Hosokawa, Yoshizumi Miyoshi, Yasunobu Ogawa, and Satoshi Kurita

An event study of the M-I-T coupling at a pseudo breakup during geomagnetically quiet conditions International coauthorship International conference

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

AGU Fall meeting 2020 

An event study of the thermospheric response at a pseudo breakup during geomagnetically quiet conditions International coauthorship International conference

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

地球電磁気・地球惑星圏学会 

SDI-3D Invited International coauthorship International conference

Shin-ichiro Oyama, SDI-3D project team

CHAMOS workshop 2020  2020.10.20  CHAMOS

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 Invited International coauthorship

大山伸一郎, SDI-3Dプロジェクトチーム

中間圏・熱圏・電離圏 (MTI) 研究集会  宇宙地球環境研究所, 情報通信研究機構, 京都大学

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 Invited International coauthorship

大山伸一郎

宇宙空間からの地球超高層大気観測に関する研究会  宇宙地球環境研究所, 京都大学

Thermospheric wind acceleration in the ionospheric trough for Kp = 0+ International coauthorship

Shin-ichiro Oyama, 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

JpGU 2020  JPGU

SAR arc at 68o geomagnetic (71o geographic) North for Kp = 0+ International coauthorship

Shin-ichiro Oyama, 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

JpGU 2020  JPGU

SAR arc at 68o geomagnetic (71o geographic) North for Kp = 0+ International coauthorship International conference

Shin-ichiro Oyama, 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

Apatity Seminar 2020  Polar Geophysical Institute, Russia

Diversity of the auroral-subauroral ionosphere and thermosphere during very low Kp condition International coauthorship International conference

Shin-ichiro Oyama, Anita Aikio, Heikki Vanhamaki, Yasunobu Ogawa, Atsuki Shinbori, Mike Rietveld, Mirjam Kellinsalmi, Abiyot Workayehu, Marcus Pedersen

Observatory Days 2020  Sodankyla Geophysical Observatory, Univ. of Oulu

Study of latitudinal coupling of upper atmospheric variations based on multi-point ground network observations

Grant number：21H04518  2021.4 - 2026.3

Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

Energy dissipation in the polar thermosphere at the substorm recovery phase

Grant number：16K05569  2016.10 - 2019.3

Oyama Shin-ichiro

Study of dynamical variation of particles and waves in the inner magnetosphere using ground-based network observations (PWING Project)

Grant number：16H06286  2016.4 - 2021.3

Grants-in-Aid for Scientific Research  Grant-in-Aid for Specially Promoted Research

Strategic and technical pioneering for foundation of the demonstrative research on the space-Earth coupling mechanisms and the next-generation magnetosphere and ionosphere exploration mission

Grant number：16H02230  2016.4 - 2020.3

Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

Hirahara Masafumi

Elucidation of auroral polarization by spectral polarization imaging observation

Grant number：26302005  2014.4 - 2018.3

Sakanoi Takeshi

脈動オーロラが起こす熱圏風速変動の解明

Grant number：24540478  2012.4 - 2015.3

科学研究費補助金  基盤研究(C)

大山伸一郎

EISCATレーダーを用いたジオスペースに関する国際協同研究

Grant number：22403010  2010.4 - 2014.3

科学研究費補助金  基盤研究(B)

藤井 良一

Comprehensive research on magnetosphere -ionosphere-thermosphere-mesosphere coupling process using the EISCAT radars and other instruments

Grant number：18403010  2006.4 - 2009.3

Grant-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research(B)

Study on the active role of the ionosphere in the Magnetosphere-Ionosphere coupling process

Grant number：17340145  2005.4 - 2008.3

Grant-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research(B)

Research on the coupling process between the lower thermosphere and the mesosphere in the polar region by using radar observations and model predictions

Grant number：16340146  2004.4 - 2007.3

Grant-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research(B)

Research on the atmospheric dynamics in the polar raesosphere/thermosphere

1999.4 - 2001.3

Grant-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research(C)

物理学実験

2017

物理学実験

2013

物理学実験

2009