Mini-rf radar observations of polar craters: are they rough, smooth, or icy?

G. W. Patterson, L. M. Jozwiak, R. Kirk, T. L. Becker, R. Perkins, L. M. Carter, A. M. Stickle, J. T. S. Cahill, B. J. Thomson, C. D. Neish and the Mini-RF team Planetary Exploration Group, Johns Hopkins University Applied Physics Laboratory, Laurel, MD (Wes.Patterson@jhuapl.edu), U.S. Geological Survey, Astrogeology Science Center, Flagstaff AZ, Department of Earth and Environmental Sciences, Wesleyan University, Middletown, CT, Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, 5 Dept. of Earth and Planetary Sciences, University of Tennessee, Knoxville, TN, University of Western Ontario, London, ON, Canada.