Japan Geoscience Union Meeting 2019

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[E] Poster

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

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

Sun. May 26, 2019 10:45 AM - 12:15 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

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

[PEM14-P03] The First Result on Ionospheric Space Weather of FORMOSAT-5/AIP Ion Density

*FU-YUAN CHANG1, JANN-YENQ Liu1, Chi-Kuang Chao1 (1.National Central University)

Keywords:topside ionosphere, equatorial plasma depletion bay, plasma drift

The science payload of Advantage Ionosphere Probe (AIP) onboard FORMOSAT-5 (F5) launched on 24 August 2017 has being operated in a Sun synchronous orbit at 720km altitude with an inclination angle of 98.28 degrees and the revisit period every 2-day. The global distribution of F5/AIP ion density (Ni) in nighttime of 2200LT during November 2017-October 2018 is examined and reported. F5/AIP ion densities show that equatorial plasma depletions frequently appear over South America, Africa, and Asia sectors; four-peaked EIA (non-migrating tide) structures prominently occur in September-March; and plasma depletion bays (PDBs) at low-latitudes in April-August. It is found that prominent locations of the plasma depletions slightly differ from those of equatorial irregularities, while non-migrating tide and PDBs result from different physical mechanisms.