1. Eyring Materials Center Arizona State University 901 S. Palm Walk, PSA 213 Tempe Arizona 85287–1704 USA
2. Department of Earth and Planetary Sciences and the McDonnell Center for the Space Sciences Washington University in St. Louis One Brookings Drive St. Louis Missouri 63130 USA
3. Space Sciences Laboratory University of California Berkeley Berkeley California 94720–7450 USA
4. Department of Geosciences University of Arizona 1040 East Fourth St. Tucson Arizona 85721–0077 USA
5. Department of Physics and Astronomy Purdue University 525 Northwestern Avenue West Lafayette Indiana 47907–2036 USA
6. Department of Earth, Atmospheric, and Planetary Sciences Purdue University 525 Northwestern Avenue West Lafayette Indiana 47907–2036 USA
7. Department of Earth Sciences University of Western Ontario 1151 Richmond Street N London Ontario N6A 5B7 Canada
8. Department of Earth and Space Sciences University of Washington 4000 15th Avenue NE Seattle Washington 98195 USA