日本地球惑星科学連合2018年大会

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[EE] ポスター発表

セッション記号 P (宇宙惑星科学) » P-EM 太陽地球系科学・宇宙電磁気学・宇宙環境

[P-EM16] Dynamics of Earth's Inner Magnetosphere and Initial Results from Arase

2018年5月22日(火) 15:30 〜 17:00 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:Danny Summers(Memorial University of Newfoundland)、三好 由純(名古屋大学宇宙地球環境研究所)、細川 敬祐(電気通信大学大学院情報理工学研究科、共同)、海老原 祐輔(京都大学生存圏研究所)

[PEM16-P17] Energy spectra variations of high energy electrons in the inner magnetosphere depending on magnetic latitude and longitude observed by ARASE and HIMAWARI

*高島 健1東尾 奈々2三谷 烈史1長妻 努3三好 由純4 (1.宇宙航空研究開発機構宇宙科学研究所、2.宇宙航空研究開発機構、3.情報通信研究機構、4.名古屋大学)

キーワード:放射線帯、波動粒子相互作用、高エネルギー粒子、あらせ

The ARASE spacecraft was launched in December 20, 2016 to investigate mechanisms for acceleration and loss of relativistic electrons in the radiation belts during space storms.

Interactions between waves and particles are the cause of particle acceleration and disappearance in the radiation belt. Because of these interactions, it appears as a change in the power low index of the energy spectrum and flux changes in the observation. The relativistic electrons in the outer radiation belt were disappeared/increased and their energy spectra were changed dynamically in some storms observed by XEP/HEP onboard the ARASE spacecraft. So, detailed calibration between observation instruments, HEP, XEP on ARASE and SEDA-e on HIMAWARI, is required to identify affected energy by wave-particle interactions. We have carried out mutual calibration using data of HEP, XEP and SEDA-e.

When comparing the energy spectra, there are times when the spectrum matches or does not match. It is also observed that the change in the power low index of the energy spectrum differs with time. These phenomena are observed even when there are two satellites at the same local time. We investigate the influence of difference of magnetic latitude on energy spectrum because ARASE satellite and HIMAWARI satellite have different inclination angles on orbits and we will report results.