1. Lunar and Planetary Institute, 3600 Bay Area Boulevard, Houston, Texas, 77058, USA
2. Department of Earth and Environmental Sciences, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
3. The Johns Hopkins Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, Maryland, 20723, USA
4. European Space Agency, European Space Research and Technology Centre, Keplerlaan 1, Postbus 299, 2200 AG Noordwijk, The Netherlands
5. Dept. of Earth and Planetary Sciences, Birkbeck, University of London, Malet St, Bloomsbury, London, WC1E 7HX, UK
6. NASA Ames Research Center, Planetary Systems Branch, Code SST, Moffett Field, Mountain View, California, 94043, USA
7. Dept. Physics and Astronomy, 414 Van Allen Hall, University of Iowa, Iowa City, Iowa, 52242, USA
8. NASA Lyndon B. Johnson Space Center, Mail Code XI3, 2101 NASA Parkway, Houston, Texas, 77058, USA
9. China University of Geosciences, Planetary Science Institute, 388 Lumo Road, Wuhan, Hubei, 430074, People’s Republic of China