1. School of Earth and Atmospheric SciencesGeorgia Institute of Technology Atlanta GA USA
2. Institute of Geophysics and Planetary PhysicsUniversity of California Los Angeles CA USA
3. Jet Propulsion LaboratoryCalifornia Institute of Technology Pasadena CA USA
4. Planetary Science Institute Tucson AZ USA
5. Max Planck Institute for Solar System Research Göttingen Germany
6. Lunar and Planetary Institute Houston TX USA
7. United States Geological Survey Flagstaff AZ USA
8. Lunar and Planetary Laboratory Tucson AZ USA