1. Planetary Exploration Group; The Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
2. Department of Earth and Planetary Sciences; Washington University; St. Louis Missouri USA
3. Department of Earth and Planetary Sciences; The Johns Hopkins University; Baltimore Maryland USA
4. China University of Geosciences; Wuhan China
5. Centre for Earth Evolution and Dynamics; University of Oslo; Oslo Norway
6. NASA Johnson Space Center; Houston Texas USA
7. Hawaii Institute of Geophysics and Planetology; University of Hawaii; Honolulu Hawaii USA
8. Lamont-Doherty Earth Observatory; Columbia University; Palisades New York USA
9. Department of Terrestrial Magnetism; Carnegie Institution of Washington; Washington District of Columbia USA