1. SOA Key Laboratory for Polar Science; Polar Research Institute of China; Shanghai China
2. State Key Laboratory of Space Weather; Chinese Academy of Sciences; Beijing China
3. Department of Physics and Astronomy; University of Calgary; Calgary, Alberta Canada
4. Data Analysis Center for Geomagnetism and Space Magnetism, Graduate School of Science; Kyoto University; Kyoto Japan
5. Department of Physics and Astronomy; University of Leicester; Leicester UK