1. Qian Xuesen Laboratory of Space Technology Beijing China
2. SIGMA Space Weather Group National Space Sciences Center Chinese Academy of Sciences Beijing China
3. School of Earth and Space Sciences Peking University Beijing China
4. Space Research Institute Austrian Academy of Sciences Graz Austria
5. Institut für Geophysik und Extraterrestrische Physik Technische Universität Braunschweig Braunschweig Germany