1. School of Space and EnvironmentBeihang University Beijing China
2. RAL SpaceSTFC Oxfordshire UK
3. LASPUniversity of Colorado Boulder Boulder CO USA
4. School of Earth and Space SciencesPeking University Beijing China
5. Key Laboratory of Planetary Sciences, Purple Mountain ObservatoryChinese Academy of Sciences Nanjing China
6. NASA Goddard Space Flight Center Greenbelt MD USA
7. Department of Earth, Planetary and Space SciencesUCLA Los Angeles CA USA