1. DLR Institute for Planetary Research, Rutherfordstraße 2, 12489 Berlin, Germany, martin.knapmeyer@dlr.de
2. Max Planck Institute for Solar System Research, Justus‐von‐Liebig‐Weg 3, 37077 Göttingen, Germany
3. Swiss Seismological Service, ETH Zürich, Sonneggstrasse 5, 8092 Zürich, Switzerland
4. Institute de Physique du Globe de Paris (IPGP), Bât. Lamarck, 35 rue Hélène Brion, 75205 Paris, CEDEX 13, France
5. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 U.S.A.
6. AWE Blacknest, Brimpton, Reading, Berkshire RG7 4RS, United Kingdom
7. School of Earth Sciences, University of Bristol, Wills Memorial Building, Queens Road, Bristol BS8 1RJ, United Kingdom
8. NASA Marshall Space Flight Center, 320 Sparkman Drive, Huntsville, Alabama 35805 U.S.A.