Japan Geoscience Union Meeting 2019

Presentation information

[E] Oral

P (Space and Planetary Sciences ) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM11] Dynamics of Magnetosphere and Ionosphere

Thu. May 30, 2019 3:30 PM - 5:00 PM A04 (TOKYO BAY MAKUHARI HALL)

convener:Aoi Nakamizo(Applied Electromagnetic Research Institute, National Institute of Information and Communications Technology), Mitsunori Ozaki(Faculty of Electrical and Computer Engineering, Institute of Science and Engineering, Kanazawa University), Akiko Fujimoto(Kyushu Institute of Technology), Tomoaki Hori(Institute for Space-Earth Environmental Research, Nagoya University), Chairperson:Naritoshi Kitamura(東京大学大学院理学系研究科), Yuka Sato(日本工業大学), Masaki Nishino(名古屋大学宇宙地球環境研究所)

4:15 PM - 4:30 PM

[PEM11-28] PARM: Investigation of precipitating high-energy electrons into the auroral ionosphere with sounding rockets

*Kazushi Asamura1, Yoshizumi Miyoshi2, Keisuke Hosokawa3, Takefumi Mitani1, Taku Namekawa1,5, Takeshi Sakanoi4, Naoshi Yagi4, Mizuki Fukizawa4, Genki Ishizawa4, Satoshi Kasahara5, Shin Sugo5, Oya Kawashima5, Reiko Nomura6, Masahito Nose2, Mariko Teramoto2, Yasunobu Ogawa7, Shinji Saito2, Ryoichi Fujii8 (1.ISAS / JAXA, 2.ISEE, Nagoya University, 3.The University of Electro-Communications, 4.Tohoku University, 5.The University of Tokyo, 6.NAOJ / NINS, 7.NiPR / ROIS, 8.ROIS)

Keywords:electron microburst precipitation, sounding rocket, pulsating aurora

Bursty precipitations of high-energy electrons into the polar ionopshere have been observed by low-altitude satellite, for example, SAMPEX and FIREBIRD II. These precipitations, called microburst, may contribute to the loss of the terrestrial radiation belt through the collisional energy loss with the dense, cold atmospheric particles. Recent numerical simulations successfully reproduce these microburst precipitations with a few Hz modulations by taking into account the pitch angle scattering with the whistler chorus elements at off-equator regions in the inner magnetosphere. Therefore, one can expect that the miscroburst precipitations have properties depending on auroral activities especially the pulsating auroras. In order to investigate the mechanisms of the microburst precipitations by in-situ observations, we are developing two instrument packages: PARM (Pulsating AuRora and Microbursts; already developed) and PARM-2 (being developed), both of which are designed suitable for sounding rocket experiments. PARM consists of four sensors; HEP (high-energy electron energy spectrometer), MED (medium-energy electron detector), AIC (auroral camera), and AFG (ASIC-based fluxgate magnetometer). PARM was onboard the NASA's RockSat-XN sounding rocket, and launched from Andoya, Norway at 09:13UT, Jan 13, 2019. On the other hand, PARM-2 is under development. It consists of HEP, two AICs, and MIM (magneto-impedance magnetometer). PARM-2 is to be onboard the NASA's LAMP sounding rocket which will fly from Poker Flat, Alaska in the period between the end of 2019 and the beginning of 2020.

We will present the overview of PARM missions including the initial results of RockSat-XN/PARM with ground-based observations and preparation status of LAMP/PARM-2.