J. Grant Mitchell^1,2, Georgia Adair de Nolfo¹, Vladimir Airapetian³, Alessandro Bruno¹, Eric R Christian⁴, Ian G Richardson¹ and James M Ryan⁵, (1)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (2)George Washington University, Department of Physics, Washington, MD, United States, (3)SEEC/NASA Goddard Space Flight Center & American University, DC, SEEC, Greenbelt, MD, United States, (4)NASA GSFC, Greenbelt, MD, United States, (5)Univ New Hampshire, Durham, NH, United States