Doris Breuer¹, Frank W Wagner², Frank Sohl¹, Hauke Hussmann¹, Luciano Iess³, Mazarico Erwan⁴, Suzanne E Smrekar⁵, Alexander Stark¹ and Gregor Steinbrügge⁶, (1)German Aerospace Center DLR Berlin, Berlin, Germany, (2)Ulm University, Ulm, Germany, (3)Univ. La Sapienza, Roma, Italy, (4)NASA Goddard Space Flight Center, Greenbelt, MA, United States, (5)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (6)Institute for Geophysics, University of Texas at Austin, Austin, United States