1. Institut für Planetologie, Westfälische Wilhelms-Universität, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany
2. Institute of Geological Sciences, Planetary Sciences and Remote Sensing, Freie Universität Berlin, Berlin, Germany
3. Southwest Research Institute, 1050 Walnut St., Suite 300, Boulder, CO 80302, USA
4. Institute for Dynamics of Geospheres, Russian Academy of Sciences, Moscow, Russia
5. Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, CA 90095, USA
6. Marshall Space Flight Center, Huntsville, Alabama, USA
7. Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, USA
8. U.S. Geological Survey, Astrogeology Science Center, 2255 N. Gemini Dr., Flagstaff, Arizona 86001, USA
9. Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, Rhode Island, USA