Arnaud Masson¹, D Aaron Roberts², Shing F Fung³, Yoshizumi Miyoshi⁴, Shinsuke Imada⁴, Jean-Christophe Malapert⁵ and Christophe Arviset⁶, (1)European Space Agency, Villanueva De La Can, Spain, (2)NASA Goddard SFC, Code 672, Greenbelt, MD, United States, (3)NASA Goddard Space Flight Ctr, Greenbelt, MD, United States, (4)Nagoya University, ISEE, Nagoya, Japan, (5)CNES, Toulouse, France, (6)European Space Agency, ESAC, Madrid, Spain