1. Space Sciences LaboratoryUniversity of California Berkeley California USA
2. Department of Earth and Planetary SciencesHokkaido University Sapporo Japan
3. Formerly at Tohoku University Sendai Japan
4. Department of PhysicsNational Cheng‐Kun University Tainan Taiwan
5. Japan Polar Research Association Tokyo Japan
6. National Space Program Office Hsinchu Taiwan
7. Academia Sinica Taipei Taiwan