1. Space Research Institute; Austrian Academy of Sciences; Graz Austria
2. State Key Laboratory of Space Weather; Chinese Academy of Sciences; Beijing China
3. Institute of Geophysics and Planetary Physics; University of California; Los Angeles California USA
4. School of Astronautics; Beihang University; Beijing China
5. Department of Automatic Control and Systems Engineering; University of Sheffield; Sheffield UK
6. Institute of Geophysics; Universidad Nacional Autonoma de Mexico, Ciudad Universitaria; Mexico City Mexico