1. CAS Key Laboratory of Geospace Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
2. Institute of Space Science, National Central University, Zhongli 32001, Taiwan
3. Insitute for Physical Sciences and Technology, University of Maryland, College Park, Maryland 20742, USA
4. School of Space Research, Kyung Hee University, Yongin, Gyeonggi 446-701, South Korea
5. Collaborative Innovation Center of Astronautical Science and Technology, Harbin 150001, China