Anna Kotova¹, Leonardo Regoli², Elias Roussos³, Peter Kollmann⁴, John F Cooper⁵, Norbert Krupp³ and Iannis S Dandouras¹, (1)IRAP, Toulouse, France, (2)University of Michigan Ann Arbor, Ann Arbor, MI, United States, (3)Max Planck Institute for Solar System Research, Katlenburg-Lindau, Germany, (4)The Applied Physics Laboratory, John Hopkins University, Laurel, MD, United States, (5)NASA Goddard Space Flight Cntr, Greenbelt, MD, United States