2022 Fiscal Year Final Research Report
Understanding and Utilization of Excitation and Propagation Mechanisms of Plasma Waves by Simultaneous Multipoint Measurement
| Project/Area Number |
20K14546
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 17010:Space and planetary sciences-related
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| Research Institution | Kanazawa University (2021-2022)
Japan Aerospace EXploration Agency (2020) |
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Principal Investigator |
Matsuda Shoya 金沢大学, 電子情報通信学系, 准教授 (20772213)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 電磁イオンサイクロトロン波動 / あらせ衛星 / DSX衛星 / 内部磁気圏 / ジオスペース |
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| Outline of Final Research Achievements |
In this study, we focused on multi-point measurements of the terrestrial inner magnetosphere by combining satellite and ground-based observations, and aims to understand the excitation and propagation mechanisms of plasma waves that control the inner magnetospheric physics. The most significant achievement of this research is the elucidation of the propagation path and spatial extent of electromagnetic ion cyclotron waves through simultaneous multi-point observations in space and on the ground. The simultaneous observation of low-energy ion heating by plasma waves as well as plasma wave propagation contributed to a three-dimensional understanding of wave-particle interactions in the inner magnetosphere. We also realized cooperative observations with the U.S. DSX satellite and succeeded in the world's first active VLF radio wave transmission experiment in geospace.
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| Free Research Field |
磁気圏物理学
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| Academic Significance and Societal Importance of the Research Achievements |
近年各国で検討される衛星は，単機衛星による観測から，2機以上の複数衛星による編隊観測(フォーメーションフライト) に徐々に移行しつつある．本研究による海外衛星との共役観測から，将来の編隊観測に向けた観測要件定義(衛星間距離，編隊形状等) や科学課題の洗い出しを検討し，将来の編隊飛行衛星計画へと繋げていくことができる．また，BepiColombo やJUICE といった我が国の惑星探査ミッションに，本研究で得られた知見を活用し，貴重な観測機会におけるサイエンスアウトプットの最大化に貢献できる．
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