1. Institute of Space Physics and Applied Technology; Peking University; Beijing China
2. Department of Physics; University of Alberta; Edmonton Alberta Canada
3. Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing China
4. Applied Physics Laboratory; Johns Hopkins University; Laurel Maryland
5. Department of Physics Institute for Earth, Oceans and Space; University of New Hampshire; Durham New Hampshire USA
6. The Aerospace Corporation; Los Angeles California USA
7. Space and Atmospheric Sciences Group; Los Alamos National Laboratory; Los Alamos New Mexico USA
8. Laboratory for Atmospheric and Space Physics; University of Colorado; Boulder Colorado USA