1. Department of Physics; National Cheng Kung University; Tainan City Taiwan
2. Institute of Space Science; National Central University; Jhongli City Taiwan
3. Institute of Space, Astrophysical and Plasma Sciences; National Cheng Kung University; Tainan City Taiwan
4. Plasma and Space Science Center; National Cheng Kung University; Tainan City Taiwan
5. Earth Dynamical System Research Center; National Cheng Kung University; Tainan City Taiwan
6. Space Sciences Laboratory; University of California; Berkeley California USA
7. Department of Cosmosciences; Hokkaido University; Sapporo Japan