[P-EM12] Coupling Processes in the Atmosphere-Ionosphere System

[PEM12-P25] Equatorial Plasma Density Irregularities Observed by Advanced Ionospheric Probe Onboard FORMOSAT-5 Satellite

*Chi-Kuang Chao¹ (1.Department of Space Science and Engineering, National Central University)

キーワード：Plasma Irregularities, AIP, FORMOSAT-5

A FORMOSAT-5 satellite was launched on 25 August 2017 CST into a 98.28° inclination sun-synchronous circular orbit at 720 km altitude along the 1030/2230 local time sectors. Advanced Ionospheric Probe (AIP), a piggyback science payload developed by National Central University for the FORMOSAT-5 satellite, has measured in-situ ionospheric plasma concentrations at a 1,024 Hz sampling rate over a wide range of spatial scales for more than 6 years. In this poster, global plasma density irregularities in the pre-midnight sector had been seasonally selected from FORMOSAT-5/AIP data during 2018 to 2023. Yearly variations of these irregularity patterns with solar cycle could be clearly observed.