1. Department of Geophysics and Planetary Sciences CAS Key Laboratory of Geospace Environment University of Science and Technology of China Hefei China
2. CAS Center for Excellence in Comparative Planetology Hefei China
3. Mengcheng National Geophysical Observatory University of Science and Technology of China Hefei China
4. Center for Space Physics Boston University Boston MA USA
5. Department of Atmospheric and Oceanic Sciences University of California Los Angeles CA USA