講演情報
[PEM13-P09]Broadband and discrete ULF wave indices in the inner magnetosphere derived from magnetic field observation of Arase satellite
*寺本 万里子1、松岡 彩子2、三好 由純3、篠原 育4、北村 健太郎1 (1.九州工業大学、2.京都大学、3.名古屋大学、4.宇宙航空研究開発機構 宇宙科学研究所)
The ultra low frequency (ULF) wave indices are derived from the amplitude of magnetic field distributions with the 2-8 min periods and determined by the ground measurements at high latitudes or satellites in geosynchronous orbit. This index characterizes the level of disturbance in the geomagnetic field. Evaluated ULF wave index is correlated with electron flux enhancements in the radiation belt [Kozyeva et al., 2007; Romanova et al., 2007; Romanova and Pilipenko, 2009].
In this study, we derived the broadband and discrete ULF wave indices at different L-shell in the inner magnetosphere (L < 8), using the magnetic field data from Arase satellite, considering both toroidal and poloidal ULF waves. We will compare them with solar wind parameters, and geomagnetic index and discuss possible applications of these indices.
In this study, we derived the broadband and discrete ULF wave indices at different L-shell in the inner magnetosphere (L < 8), using the magnetic field data from Arase satellite, considering both toroidal and poloidal ULF waves. We will compare them with solar wind parameters, and geomagnetic index and discuss possible applications of these indices.