1. Department of Physics; National Cheng Kung University; Tainan Taiwan
2. Institute of Space Science; National Central University; Jhongli Taiwan
3. Earth Dynamic System Research Center; National Cheng Kung University; Tainan Taiwan
4. Institute of Space, Astrophysical and Plasma Sciences; National Cheng Kung University; Tainan Taiwan
5. Plasma and Space Science Center; National Cheng Kung University; Tainan Taiwan
6. Department of Electrical and Computer Engineering; Duke University; Durham North Carolina USA
7. Space Sciences Laboratory; University of California; Berkeley California USA
8. Department of Cosmosciences; Hokkaido University; Sapporo Japan