日本地球惑星科学連合2019年大会

講演情報

[E] 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-EM14] Recent Advances in Ionosphere Observation and Modeling for Monitoring and Forecast

2019年5月26日(日) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:Yang-Yi Sun(China University of Geosciences)、LIN CHIYEN(Center for Astronautical Physics and Engineering, National Central University, TAIWAN)、MINYANG CHOU(National Cheng Kung University)

[PEM14-P02] Global Plasma Density Irregularity Distributions Observed by Advanced Ionospheric Probe Onboard FORMOSAT-5 Satellite

*Chi-Kuang Chao1Yi-Wun Chen1 (1.Graduate Institute of Space Science, National Central University)

キーワード:AIP, FORMOSAT-5, Irregularities

A FORMOSAT-5 satellite has been launched on25 August 2017 CST into a 98.28° inclination sun-synchronous circular orbit at 720 km altitude along the 1030/2230 local time sectors. The orbital coverage provides a great opportunity to survey terrestrial ionosphere from equatorial to polar region every two days. Advanced Ionospheric Probe (AIP) is a piggyback science payload developed by National Central University for the FORMOSAT-5 satellite to measure ionospheric plasma concentrations, velocities, and temperatures. It is also capable of measuring ionospheric plasma density irregularities at a sample rate up to 8,192 Hz over a wide range of spatial scales. In this presentation/poster, distributions and structures of pre-midnight low-latitude ionospheric plasma density irregularities will be shown from AIP science data collected since winter 2017. Especially, seasonal variations of the distributions will be compared with ROCSAT-1/Ionospheric Plasma and Electrodynamics Instrument dataset (1999-2004) to understand their trends. Meanwhile, high resolution data measured at a BURST rate (8,192 Hz) in some longitudinal sectors with high plasma density irregularity occurrence rates will also be investigated by spectral analysis to understand their characteristics.