John W Holt, University of Arizona, Geosciences, Lunar and Planetary Laboratory, Tucson, AZ, United States, Martin Truffer, University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States, Christopher F Larsen, University of Alaska Fairbanks, Fairbanks, AK, United States, Michael Steven Christoffersen, University of Arizona, Lunar and Planetary Laboratory, Tucson, AZ, United States; University of Arizona, Lunar and Planetary Laboratory, Tucson, United States and Brandon Tober, University of Arizona, Geosciences, Tucson, AZ, United States