1. Department of Climate and Space Sciences and Engineering; University of Michigan; Ann Arbor Michigan USA
2. Department of Physics and Astronomy; University of Leicester; Leicester UK
3. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing China
4. School of Earth and Space Sciences; Peking University; Beijing China
5. Heliophysics Science Division; NASA Goddard Space Flight Center; Greenbelt Maryland USA
6. Solar System Exploration Division; NASA Goddard Space Flight Center; Greenbelt Maryland USA
7. Universities Space Research Association; Columbia Maryland USA
8. Space Science and Engineering Division; Southwest Research Institute; San Antonio Texas USA
9. Department of Physics and Astronomy; University of Southampton; Southampton UK