1. Department of Aerospace Engineering Sciences; University of Colorado at Boulder; Boulder Colorado USA
2. Laboratory for Space Weather; Chinese Academy of Sciences; Beijing China
3. Laboratory for Atmospheric and Space Physics; University of Colorado at Boulder; Boulder Colorado USA
4. Space Sciences Laboratory; University of California; Berkeley California USA
5. Department of Earth and Space Sciences; University of California; Los Angeles California USA
6. Institut für Geophysik and Extraterrestrische Physik; Technische Universität Braunschweig; Braunschweig Germany
7. Max Planck Institute for Solar System Research; Katlenburg-Lindau Germany