1. Lunar and Planetary Laboratory; University of Arizona; Tucson AZ USA
2. Lunar and Planetary Institute; Houston TX USA
3. Department of Geosciences; Baylor University; Waco TX USA
4. Department of Earth, Environmental and Planetary Sciences; Brown University; Providence RI USA
5. Department of Earth, Atmospheric and Planetary Sciences; Massachusetts Institute of Technology; Cambridge MA USA
6. Lamont-Doherty Earth Observatory; Columbia University; Palisades NY USA
7. Department of Terrestrial Magnetism; Carnegie Institution of Washington; Washington DC USA
8. Laboratoire Lagrange; Observatoire de la Côte d'Azur; Nice France