1. Department of Geophysics; Kyoto University; Kyoto Japan
2. Plasma Physics Division; Naval Research Laboratory; Washington, D.C. USA
3. Department of Earth Science; National Cheng Kung University; Tainan Taiwan
4. Earth Dynamic System Research Center; National Cheng Kung University; Tainan Taiwan
5. Institute of Space Science; National Central University; Chung-Li Taiwan
6. Center for Space and Remote Sensing Research; National Central University; Chung-Li Taiwan