Martin Knapmeyer¹, William Bruce Banerdt², Maren Böse³, John F Clinton³, Domenico Giardini³, Anna C Horleston⁴, Taichi Kawamura⁵, Amir Khan³, Philippe Henri Lognonné⁶, Mark P Panning⁷, William T Pike⁸, Simon C Staehler³, Martin van Driel⁹ and Renee C Weber¹⁰, (1)German Aerospace Center DLR Berlin, Berlin, Germany, (2)Jet Propulsion Laboratory, Pasadena, CA, United States, (3)ETH Zurich, Zurich, Switzerland, (4)University of Bristol, Bristol, United Kingdom, (5)Université de Paris, Institut de physique du globe de Paris, Paris, France, (6)Université de Paris, Institut de physique du globe de Paris, CNRS, Paris, France, (7)Univ of FL-Geological Sciences, Gainesville, FL, United States, (8)Imperial College London, London, SW7, United Kingdom, (9)ETH Zurich, Department of Earth Sciences, Institute of Geophysics, Zurich, Switzerland, (10)NASA/NSSTC, Huntsville, AL, United States