Martian Craters and a Scarp as Seen by Radar

Radar observations of Mars with a surface resolution of 1.3� in latitude and 0.8� in longitude have been carried out during the opposition of 1971. With a precision in surface height measurement approaching 75 meters in regions of high reflectivity, it has been possible to measure the detailed characteristics of a number of craters. Many of these can be identified with craters shown in Mariner photographs of Mars. In addition, a scarp has been seen at 41� west, 14� south with an average slope of about 6� extending over about 40 kilometers.