Improved remote sensing of wave-particle interaction region using multimedia signal processing techniques

• Project/Area Number: 17K06456
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Measurement engineering
• Research Institution: Kanazawa University
• Principal Investigator: Ozaki Mitsunori 金沢大学, 電子情報通信学系, 准教授 (70422649)
• Co-Investigator(Kenkyū-buntansha): 平野 晃宏 金沢大学, フロンティア工学系, 講師 (70303261)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2017: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 自然電磁波 / 動オブジェクト抽出 / 雑音除去 / 波動粒子相互作用 / 自然電磁波動 / 時間周波数解析 / 動輪郭モデル / 動的輪郭モデル / 波動粒子相互作用領域 / 音声信号処理 / ノイズ除去 / 動画像処理

Outline of Final Research Achievements

This study finds that a proton aurora includes a fast luminous modulation with 1-second order and a pulsating aurora and flash aurora show fast (tens to a few hundreds of milliseconds) luminous modulations correlated with amplitude variations of chorus waves in the magnetosphere using multimedia (voice and movie) signal processing techniques for identifying wave-particle interaction regions, which can be determined the space electromagnetic environments near the earth. These results are given by an advantage of high temporal resolution in remote sensing on the ground.

Academic Significance and Societal Importance of the Research Achievements

本研究では、マルチメディア（音声・動画像）信号処理による雑音抑圧、動オブジェクト抽出などの技術を電磁環境探査に応用する。これにより、衛星観測では現象の時空間変化を区別することが難しい波動粒子相互作用発生域の変化を、地上からのリモートセンシングとして、高時間分解能で時間変化と空間変化を検出できる学術的特色を有する。これは、宇宙の電磁環境を特徴づけると考えられる波動粒子相互作用発生域の詳細把握に貢献する。

Research Products

• [Int'l Joint Research] アサバスカ大学(カナダ)
• [Int'l Joint Research] フロリダ大学(米国)
• [Journal Article] あらせ衛星における交流磁界計測技術と波動粒子相互作用の 衛星地上同時観測について (2019)
  • Author(s): 尾崎光紀
  • Journal Title: 電子情報通信学会誌 Volume: 102 Pages: 1129-1134
  • NAID: 40022091646
• [Journal Article] Visualization of rapid electron precipitation via chorus element wave?particle interactions (2019)
  • Author(s): Ozaki M. et al.
  • Journal Title: Nature Communications Volume: 10 Issue: 1 Pages: 1-9
  • DOI: 10.1038/s41467-018-07996-z
  • NAID: 120006550406
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Microscopic Observations of Pulsating Aurora Associated With Chorus Element Structures: Coordinated Arase Satellite‐PWING Observations (2018)
  • Author(s): Ozaki M. et al.
  • Journal Title: Geophysical Research Letters Volume: 45 Issue: 22 Pages: 1-10
  • DOI: 10.1029/2018gl079812
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Discovery of 1-Hz Range Modulation of Isolated Proton Aurora at Subauroral Latitudes (2018)
  • Author(s): Ozaki M., Shiokawa K., Miyoshi Y., Kataoka R., Connors M., Inoue T., Yagitani S., Ebihara Y., Jun C.-W., Nomura R., Sakaguchi K., Otsuka Y., Uchida H. A., Schofield I., Danskin D. W.
  • Journal Title: Geophysical Research Letters Volume: 45 Issue: 3 Pages: 1209-1217
  • DOI: 10.1002/2017gl076486
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Flash aurora as manifestation of single chorus element wave-particle interactions (2020)
  • Author(s): M. Ozaki, K. Shiokawa, Y. Miyoshi, K. Hosokawa, S. Oyama, S. Yagitani, Y. Kasahara, Y. Kasaba, S. Matsuda, R. Kataoka, Y. Ebihara, Y. Ogawa, Y. Otsuka, A. Matsuoka, I. Shinora
  • Organizer: Japanese-Czech Space Physics Symposium
  • Int'l Joint Research
• [Presentation] Spatial development of single chorus element wave-electron interaction region deduced from flash aurora and ray tracing (2020)
  • Author(s): M. Ozaki, T. Inoue, Y. Tanaka, Y. Goto, S. Yagitani, Y. Kasahara, K. Shiokawa, Y. Miyoshi, K. Hosokawa, S. Oyama, R. Kataoka, Y. Ebihara, Y. Ogawa, A. Kadokura
  • Organizer: Japanese-Czech Space Physics Symposium
  • Int'l Joint Research
• [Presentation] レイトレーシング解析を用いたフラッシュオーロラの時空間特性 (2019)
  • Author(s): 井上智寛, 尾崎光紀, 田中良昌, 後藤由貴, 八木谷聡, 笠原禎也, 塩川和夫, 三好由純, 片岡龍峰, 門倉昭, 海老原祐輔
  • Organizer: 太陽地球系物理学分野のデータ解析手法、ツールの理解と応用
• [Presentation] 畳み込みニューラルネットワークによるフラッシュオーロラの自動検出 (2019)
  • Author(s): 源田 斗輝, 尾崎 光紀, 八木谷 聡, 今村 幸祐, 塩川 和夫, 三好 由純, 大山 伸一郎, 片岡 龍峰, 海老原 祐輔, 細川 敬祐
  • Organizer: 太陽地球系物理学分野のデータ解析手法、ツールの理解と応用
• [Presentation] 機械学習を用いたフラッシュオーロラの時空間解析 (2019)
  • Author(s): 源田斗輝, 井上拓海, 尾崎光紀, 八木谷聡, 今村幸祐, 塩川和夫, 三好由純, 大山伸一郎, 片岡龍峰, 海老原祐輔, 細川敬祐
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] Spatiotemporal characteristics on the source region of flash aurora using ray tracing analysis (2019)
  • Author(s): Tomohiro Inoue, Mitsunori Ozaki, Yoshitaka Goto, Satoshi Yagitani, Yoshiya Kasahara, Kazuo Shiokawa, Yoshizumi Miyoshi, Ryuho Kataoka, Yusuke Ebihara
  • Organizer: 日本地球惑星科学連合2019年大会
  • Int'l Joint Research
• [Presentation] Study on the pulse noise removal technique for Pc1 geomagnetic pulsations on the ground by signal processing (2019)
  • Author(s): Fumiya Komase, Tomohiro Inoue, Mitsunori Ozaki, Satoshi Yagitani, Kazuo Shiokawa, Masahito Nose, Tsutomu Nagatsuma
  • Organizer: 日本地球惑星科学連合2019年大会
  • Int'l Joint Research
• [Presentation] GPS-TECから推定されたプラズマ密度分布の孤立プロトンオーロラ発生域への影響 (2019)
  • Author(s): 尾崎 光紀、井上 智寛、八木谷 聡、塩川 和夫、三好 由純、大塚 雄一、新堀 淳樹、片岡 龍峰、海老原 祐輔、津川 卓也、西岡 未知、Martin Connors
  • Organizer: 「プラズマ圏の観測とモデリング」研究集会
• [Presentation] あらせ衛星とPWING連携観測より得られたフラッシュオーロラの時空間特徴 (2019)
  • Author(s): 尾崎 光紀
  • Organizer: 第11回ERGサイエンス会議
  • Invited
• [Presentation] Spatiotemporal development of pulsating auroral patch associated with discrete chorus elements: Arase and PWING observations (2019)
  • Author(s): Mitsunori Ozaki
  • Organizer: AP-RASC 2019
  • Int'l Joint Research / Invited
• [Presentation] Pulsating aurora associated with temporal structures of chorus elements: Coordinated Arase satellite and PWING observations (2018)
  • Author(s): M. Ozaki
  • Organizer: AGU fall meeting 2018
  • Int'l Joint Research
• [Presentation] Flash aurora as manifestation of the nonlinear resonant interactions between single chorus element and electrons in the magnetosphere (2018)
  • Author(s): M. Ozaki
  • Organizer: SGEPSS fall meeting 2018
• [Presentation] サブオーロラ帯で観測されたフラッシュオーロラの時空間特性 (2018)
  • Author(s): 尾崎光紀、井上拓海、源田斗輝、八木谷聡、今村幸祐、塩川和夫、三好由純、大山伸一郎、片岡龍峰、海老原祐輔、細川敬祐
  • Organizer: H30年度脈動オーロラ研究集会
• [Presentation] Multi-event analysis for 1 Hz modulation of pulsating proton aurora associated with Pc1 geomagnetic pulsations (2018)
  • Author(s): T. Inoue, M. Ozaki, S. Yagitani, K. Shiokawa, Y. Miyoshi, R. Kataoka, Y. Ebihara, R. Nomura, K. Sakaguchi, Y. Otsuka, M. Connors
  • Organizer: JpGU 2018
  • Int'l Joint Research
• [Presentation] Development of a miniaturized 3-axis search coil magnetometer and a wave receiver powered by a noise reduction technique for micro-satellite experiments (2018)
  • Author(s): Yuya Tokunaga, Takumi Dejima, Tsubasa Takahashi, Mitsunori Ozaki, Satoshi Yagitani, Yoshiya Kasahara, Takahiro Zushi, Hirotsugu Kojima
  • Organizer: JpGU 2018
  • Int'l Joint Research
• [Presentation] Equatorward drifting electron/proton auroras related with spectral characteristics of chorus/EMIC waves observed at subauroral latitudes (2018)
  • Author(s): M. Ozaki, T. Inoue, K. Shiokawa, Y. Miyoshi, R. Kataoka, S. Yagitani, Y. Ebihara, M. Connors
  • Organizer: 8th biennial VLF/ELF Remote Sensing of Ionospheres and Magnetospheres Workshop (VERSIM 2018)
  • Int'l Joint Research / Invited
• [Presentation] Development of automatic detection and tracking technique for pulsating aurora (2017)
  • Author(s): T. Inoue, T. Inoue, M. Ozaki, S. Yagitani, K. Imamura
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] Estimation of source region of pulsating proton aurora (2017)
  • Author(s): T. Inoue, M. Ozaki, S. Yagitani, K. Shiokawa, Y. Miyoshi, R. Kataoka, Y. Ebihara, R. Nomura, K. Sakaguchi, Y. Otsuka, M. Connors
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] An improvement technique of the signal-to-noise ratio for ground-based VLF observation by audio signal processing (2017)
  • Author(s): T. Dejima, M. Ozaki, S. Yagitani, K. Shiokawa, Y. Miyoshi, M. Connors
  • Organizer: Asia Oceania Geosciences Society 2017
  • Int'l Joint Research
• [Presentation] Pulsating proton aurora and spiky CNA associated with Pc1 waves at sub-auroral latitudes (2017)
  • Author(s): T. Inoue, M. Ozaki, S. Yagitani, K. Shiokawa, Y. Miyoshi, R. Kataoka, Y. Ebihara, R. Nomura, K. Sakaguchi, Y. Otsuka, M. Connors, D. Danskin
  • Organizer: Asia Oceania Geosciences Society 2017
  • Int'l Joint Research
• [Presentation] Coordinated Arase satellite and ground-based observations of pulsating electron and proton auroras (2017)
  • Author(s): M. Ozaki 他
  • Organizer: 第142回地球電磁気・地球惑星圏学会総会・講演会
  • Invited
• [Presentation] Initial report on ARASE/ground observations of pulsating aurora:Spatio-temporal analysis of auroral patches related with chorus (2017)
  • Author(s): Takumi Inoue, Tomohiro Inoue, Mitsunori Ozaki 他
  • Organizer: 第142回地球電磁気・地球惑星圏学会総会・講演会
• [Presentation] A few tens of Hz modulations of pulsating electron aurora related with subpacket structures of chorus emissions (2017)
  • Author(s): Takumi Inoue, Tomohiro Inoue, Mitsunori Ozaki 他
  • Organizer: The 359th Symposium for Sustainable Humanosphere “International Workshop on radio science and radio application technology”
• [Presentation] Analysis of equatorward drifting proton aurora associated with spectral characteristics of Pc1 waves (2017)
  • Author(s): T. Inoue, M. Ozaki, S. Yagitani, K. Shiokawa, Y. Miyoshi, R. Kataoka, Y.Ebihara, R. Nomura, K. Sakaguchi, Y. Otsuka, M. Connors
  • Organizer: The 359th Symposium for Sustainable Humanosphere “International Workshop on radio science and radio application technology”
• [Presentation] Multiple timescales of pulsating electron/proton auroras related with chorus/EMIC waves (2017)
  • Author(s): Mitsunori Ozaki 他
  • Organizer: The 359th Symposium for Sustainable Humanosphere “International Workshop on radio science and radio application technology”
  • Invited
• [Presentation] Adaptive Parameter Control in Reduction of Multiple Narrow-Band Noises from Radio Waves (2017)
  • Author(s): A. Hirano, M. Ozaki, and S. Yagitani
  • Organizer: 32th SIP Symposium
• [Remarks] 研究者情報
  • URL: https://ridb.kanazawa-u.ac.jp/public/detail.php?id=3006