Japan Geoscience Union Meeting 2018

Presentation information

[EE] Poster

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

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

Tue. May 22, 2018 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:Danny Summers(Memorial University of Newfoundland), Yoshizumi Miyoshi(Institute for Space-Earth Environmental Research, Nagoya University), Keisuke Hosokawa(電気通信大学大学院情報理工学研究科, 共同), Yusuke Ebihara(Research Institute for Sustainable Humanosphere, Kyoto University)

[PEM16-P23] Statistical analysis of spacecraft charging environment in the medium earth orbit

Tsuyoshi Teraoka1, *Masao Nakamura1, Kazushi Asamura2, Iku Shinohara2, Yoshizumi Miyoshi3, Shiang-Yu Wang4 (1.Osaka Prefecture University, 2.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3.Institute for Space-Earth Environmental Research, Nagoya University, 4.ASIAA, Taiwan)

Keywords:Spacecraft surface charging, Medium earth orbit (MEO), ARASE satellite

Analysis of spacecraft surface charging in the medium earth orbit (MEO) is important for spacecraft designs and operations, because the surface charging sometimes cause spacecraft anomalies due to discharging arcs. We study the surface charging environment using the Electric Field and Wave instruments (EFW) and the Helium Oxygen Proton Electron (HOPE) data of the Van Allen Probes and the Low energy Experiments (LEP) data of the ARASE satellite. We analyze the relationship between the observed spacecraft potential and the average electron temperature which show an approximate power law relationship in the geostationary earth orbit (GEO). However, we cannot find such a power law relationship in MEO. Therefore we calculate other plasma environmental parameters, for instance, from multi-temperature treatments using a discriminant analysis for the energy flux distributions. We will discuss the relationships between the spacecraft potential and these plasma environment parameters in MEO.