1. Harbin Institute of Technology Shenzhen Graduate School Shenzhen China
2. Key Laboratory of Geospace Environment, Chinese Academy of Sciences University of Science and Technology of China Hefei China
3. Department of Physics University of Texas at Dallas Richardson TX USA
4. Space Science and Applications Group Los Alamos National Laboratory Los Alamos NM USA
5. School of Earth and Space Sciences Peking University Beijing China
6. PKU/UCLA Joint Research Institute in Science and Engineering Peking University Beijing China