1. Planetary Science Directorate, Southwest Research Institute, Boulder, CO 80302, USA and Department of Earth and Planetary Sciences, Washington University, St. Louis, MO 63130, USA.
2. Department of Space Studies, Southwest Research Institute, Boulder, CO 80302, USA.
3. Astrogeology Science Center, U.S. Geological Survey, Flagstaff, AZ 86001, USA.
4. Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA.
5. Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA.
6. Space Science and Astrobiology Division, National Aeronautics and Space Administration (NASA) Ames Research Center, Moffett Field, CA 94035, USA.
7. Bay Area Environmental Research Institute/NASA Ames Research Center, Moffett Field, CA 94035, USA.
8. Center for Earth and Planetary Studies, Smithsonian Institution, Washington, DC 20013, USA.
9. Science and Exploration Directorate, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
10. Institute for Geophysics, Jackson School of Geosciences, University of Texas, Austin, TX 78758, USA.
11. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.
12. Department of Space Operations, Southwest Research Institute, Boulder, CO 80302, USA.
13. Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, 18-00184 Rome, Italy.