1. CAS Key Laboratory of Ionospheric Environment, Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing China
2. Beijing National Observatory of Space Environment, Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing China
3. State Key Laboratory of Space Weather, Center for Space Science and Applied Research; Chinese Academy of Sciences; Beijing China
4. Key Laboratory of Basic Plasma Physics, Department of Geophysics and Planetary Sciences; University of Science and Technology of China; Hefei China
5. Space Research Institute; Austrian Academy of Sciences; Graz Austria
6. Applied Physics Laboratory; Johns Hopkins University; Laurel Maryland USA
7. Rutherford Appleton Laboratory; Chilton DIDCOT Oxfordshire UK
8. Department of Geophysics; Peking University; Beijing China