1. School of Earth and Space Sciences; Peking University; Beijing China
2. Institute of Solar-Terrestrial Physics; Russian Academy of Sciences; Irkutsk Russia
3. IGPP; UCLA; Los Angeles California USA
4. Instiute of Geophysics and Extraterrestrial Physics; Technical University of Braunschweig; Braunschweig Germany
5. Max Planck Institute of Solar System Research; Katlenburg-Lindau Germany
6. Space Sciences Laboratory; University of California; Berkeley California USA
7. Department of Physics; University of Alberta; Edmonton, Alberta Canada
8. NASA GSFC; Greenbelt Maryland USA
9. School of Physics; Peking University; Beijing China
10. Centre d'Etude Spatiale des Rayonnements; Toulouse France
11. Blackett Laboratory; Imperial College London; London UK