1. Department of Physics and Astronomy; Leicester Institute for Space and Earth Observation; University of Leicester; Leicester LE1 7RH UK
2. Los Alamos National Lab; Los Alamos New Mexico 87545 USA
3. USGS Astrogeology Science Center; Flagstaff Arizona 86001 USA
4. Mineral Spectroscopy Laboratory; Mount Holyoke College; South Hadley Massachusetts 01075 USA
5. College of Earth, Ocean, and Atmospheric Sciences; Oregon State University; Corvallis Oregon 97331 USA
6. Planetary and Space Science Centre; University of New Brunswick; Fredericton New Brunswick E3B 5A3 Canada
7. Geology Department; Southern Illinois University; 1259 Lincoln Drive Carbondale Illinois 62901 USA
8. Department of Environment, Earth and Ecosystems; The Open University; Milton Keynes MK7 6AA UK
9. Jet Propulsion Laboratory; Pasadena California 91109 USA