Thomas H Prettyman¹, Craig Hardgrove², Naoyuki Yamashita¹, Margaret E Landis³, Norbert Schorghofer⁴, Julie C Castillo⁵, Bethany L Ehlmann⁶, Lena Heffern², Simone Marchi⁷, Carle M Pieters⁸, Carol A Raymond⁹, Hanna G Sizemore¹⁰, Richard D Starr¹¹ and Michael J Toplis¹², (1)Planetary Science Institute Albuquerque, Albuquerque, NM, United States, (2)Arizona State University, Tempe, AZ, United States, (3)University of Colorado at Boulder, Laboratory for Atmospheric and Space Physics, Boulder, CO, United States, (4)Planetary Science Institute, Honolulu, HI, United States, (5)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, (6)California Institute of Technology, Geological and Planetary Sciences, Pasadena, CA, United States, (7)NASA Lunar Science Institute, Boulder, CO, United States, (8)Brown University, Providence, RI, United States, (9)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (10)Planetary Science Institute Tucson, Tucson, AZ, United States, (11)Catholic University of America, Washington, DC, United States, (12)CNRS/IRAP, University of Toulouse, Toulouse, France