1. Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China
2. College of Earth and Planetary Sciences University of the Chinese Academy of Sciences Beijing China
3. High Altitude Observatory National Center for Atmospheric Research Boulder CO USA
4. Beijing National Observatory of Space Environment Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China
5. Department of Earth and Planetary Science Kyushu University Fukuoka Japan
6. Haystack Observatory Massachusetts Institute of Technology Westford MA USA