SHOWALTER, Mark R.1, GORDON, Mitchell K.
1, A'HEARN, Michael F.
2, ACTON, Charles H.
3, ARVIDSON, Raymond E.
4, BEEBE, Reta F.
5, GADDIS, Lisa
6, LAVOIE, Susan K.
7, SIMPSON, Richard A.
8 and WALKER, Raymond J.
9, (1)SETI Institute, 515 Whisman Road, Mountain View, CA 94043, (2)University of Maryland, Department of Astronomy, College Park, MD 20742, (3)Jet Propulsion Laboratory, Mail Stop 301-125L, 4800 Oak Grove Drive, Pasadena, CA 91109, (4)Earth & Planetary Sciences, Washington University in St. Louis, 1 Brookings Drive, Saint Louis, MO 63130, (5)University of New Mexico, Department of Astronomy, P. O. Box 30001/Dept. 4500, Las Cruces, NM 88003, (6)Astrogeology Program, U. S. Geological Survey, 2255 N. Gemini Drive, Flagstaff, AZ 86001, (7)Jet Propulsion Laboratory, Mail Stop 168-514, 4800 Oak Grove Drive, Pasadena, CA 91109, (8)Stanford University, Center for Radar Astronomy, Packard Building-Room 332, Stanford, CA 94305-9515, (9)UCLA, Institute of Geophysics & Planetary Physics, 6851 Slichter Hall, Los Angeles, CA 90095, mshowalter@seti.org, mshowalter@seti.org