17:15 〜 19:15
[PEM12-P24] Annual and Seasonal Variations of Equatorial Plasma Density Irregularities Observed by Advanced Ionospheric Probe Onboard FORMOSAT-5 Satellite
キーワード：FS-5, AIP, Ionosphere, Irregularity
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 7 years. In this poster, global plasma density irregularities in the pre-midnight sector had been classified seasonally from FORMOSAT-5/AIP data during 2018 to 2024. Annual variations of these seasonal irregularity patterns could be clearly observed with solar cycle and were valuable for space climate study.