Donald F Argus¹, Ben Ratliff², Charles DeMets³, Adrian A Borsa⁴, David N Wiese⁵, Corne Kreemer⁶, Nicholas Lau⁴, Deborah Lyman Kilb⁴, Stephanie Mumma⁷ and John W Crowley⁸, (1)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, (2)University of Wisconsin Madison, Geoscience, Madison, United States, (3)University of Wisconsin Madison, Geoscience, Madison, WI, United States, (4)Scripps Institution of Oceanography, La Jolla, CA, United States, (5)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (6)University of Nevada Reno, Nevada Bureau of Mines and Geology, Reno, NV, United States, (7)Scripps Institution of Oceanography, La Jolla, United States, (8)Harvard University, Cambridge, MA, United States