text:  Radar studies preceding and following the Lunar Prospector mission demonstrate that the inner walls of Shackleton are similar in reflective characteristics to those of some sunlit craters . In particular , the surroundings appear to contain a significant number of blocks in its ejecta blanket , suggesting that its radar properties are a result of surface roughness , and not ice deposits , as was previously suggested from a radar experiment involving the Clementine mission . This interpretation , however , is not universally agreed upon within the scientific community . Radar images of the crater at a wavelength of 13 cm show no evidence for water ice deposits . 
  