1. School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Tempe, AZ 85287, USA
2. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., MS 306-392, Pasadena, CA 91109, USA
3. Lunar and Planetary Laboratory, University of Arizona, 1629 E. University Boulevard, Tucson, AZ 85721, USA
4. Southwest Research Inc., 1050 Walnut St #300, Boulder, CO 80302, USA
5. Massachusetts Institute of Technology Haystack Observatory, 99 Millstone Road, Westford, MA 01886, USA
6. Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001, USA
7. Department of Astronomy, University of Washington, 3910 15th Ave NE, Seattle, WA 98195, USA
8. NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA