Allan Wayne Labrador¹, Luke S Sollitt², Eric R Christian³, Christina Cohen⁴, Alan C Cummings⁵, Richard A Leske⁵, Glenn M Mason⁶, Richard A Mewaldt⁴, Edward C Stone¹, Tycho T von Rosenvinge⁷ and Mark E Wiedenbeck⁸, (1)California Institute of Technology, Pasadena, CA, United States, (2)Planetary Science Institute Tucson, Tucson, AZ, United States, (3)NASA GSFC, Greenbelt, MD, United States, (4)Caltech, Pasadena, CA, United States, (5)CALTECH, Pasadena, CA, United States, (6)Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States, (7)NASA Goddard SFC, Greenbelt, MD, United States, (8)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States