SM042-0014
Simultaneous observations of the electric field and particle characteristics in the plasmapause / SAPS region with the Arase satellite and SuperDARN radars

Tuesday, 15 December 2020
Poster
Tomoya Takada1, Nozomu Nishitani1, Tomoaki Hori1, Simon Shepherd2, Yasumasa Kasaba3, Atsushi Kumamoto4, Yuto Katoh3, Yoshiya Kasahara5, Masafumi Shoji6, Satoko Nakamura7, Masahiro Kitahara7, Fuminori Tsuchiya8, Kazushi Asamura6, Yoshizumi Miyoshi7, Yoichi Kazama9, Chae Woo Jun10, Wang Shiang Yu11, Shoichiro Yokota12, Satoshi Kasahara6, Kunihiro Keika13, Ayako Matsuoka6, Shun Imajo7 and Iku Shinohara14, (1)Nagoya University, Nagoya, Japan, (2)University of Bradford, School of Engineering, Bradford, United Kingdom, (3)Tohoku University, Sendai, Japan, (4)Tohoku Univ, Sendai, Japan, (5)Kanazawa University, Kanazawa, Japan, (6)ISAS/JAXA, Sagamihara, Japan, (7)ISEE, Nagoya University, Nagoya, Japan, (8)PPARC, Tohoku University, Sendai, Japan, (9)ASIAA, Taipei, Taiwan, (10)Solar-Terrestrial Environment Laboratory, Nagoya-Shi, Japan, (11)ASIAA, Taiwan, Taiwan, (12)Osaka University, Department of Earth and Space Science, Osaka, Japan, (13)University of Tokyo, Department of Earth and Planetary Science, Bunkyo-ku, Japan, (14)JAXA Japan Aerospace Exploration Agency, ISAS, Sagamihara, Japan
Abstract:
The comparison between the ionospheric convection and magnetospheric electric field is
important for understanding the magnetosphere-ionosphere coupling. However,
there have been few studies of the comparison between the SuperDARN convection
and satellite electric field data (e.g., Baker et al., 2003) and there is little understanding of low energy particle characteristics in the plasmapause / SAPS region. In this study, simultaneous observation of the SAPS related electric field and particles was carried out by the SuperDARN radar and Arase satellite. In the event of June 22, 2017, SAPS was observed by the SuperDARN CVE radar near the calculated footprint of the Arase satellite and almost concurrently the satellite detected electric field enhancements. Nearly
simultaneously, the satellite observed the plasmapause crossing and increase of
low energy (< 1 keV) ions. The increase of low energy ions seems to be related to the SAPS electric field. On the other hand, it is also suggested that the real ionospheric footprint of the Arase satellite deviates from the calculated point. Details of the relationship between these low-energy ion characteristics and the electric field distribution, as well as the deviation of the ionospheric footprint of the satellite, will be discussed.
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