Abstract
Abstract Chang’E-3 landed at the north part of the Mare Imbrium on 14 December 2013, Chang’E-4 landed at South Pole’s Aitken Basin on 3 January 2019 and Chang’E-5 landed at Rümker region in northern Oceanus Procellarum on 1 December 2020. The microwave range and velocity sensor (MRVS) on the lander provided the range and velocity information relative to the lunar surface during the powered descent phase, ensuring landing softly. In this paper, we use the lunar surface backscatter coefficient of Ka-band which was analyzed from the telemetry of MRVS equipped on Chang’E-3 and Chang’E-4, as for the important design basis of Chang’E-5 MRVS; at the same time, actual data is analyzed from the telemetry of Chang’E-5 sensor, and the accumulated analysis of lunar surface backscatter coefficient as the important reference will be used in the future MRVS design and lunar detection.
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