1. NASA Goddard Space Flight Center/Universities Space Research Association (USRA), Greenbelt, MD, USA.
2. Max Planck Institute for Solar System Research, Göttingen, Germany.
3. Lunar and Planetary Science Institute, Houston, TX, USA.
4. NASA Goddard Space Flight Center, Greenbelt, MD, USA.
5. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA.
6. Planetary Science Institute, Tucson, AZ, USA.
7. Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
8. German Aerospace Center (DLR), Berlin, Germany.
9. Institute of Geosciences, Freie Universität Berlin, Berlin, Germany.
10. School of Earth and Space Exploration, Arizona State University, Tempe, AZ, USA.
11. U.S. Geological Survey, Astrogeology Science Center, Flagstaff, AZ, USA.
12. Institut für Planetologie, Westfälische Wilhelms-Universität, Münster, Germany.
13. Georgia Institute of Technology, Atlanta, GA, USA.
14. Johns Hopkins Applied Physics Laboratory, Laurel, MD, USA.
15. Department of Earth and Space Sciences, University of California, Los Angeles, CA, USA.