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Evolution of ERS Equipment of the MSU-MR Series as Related to Increasing the Accuracy of Radiometric Measurements and Expanding Performance Capabilities

This work is devoted to the description of the technical evolution of the MSU-MR equipment installed on Meteor-3M series spacecraft. After the launch of each successive spacecraft of the series, the development team generates new ideas concerning the modernization of the MSU-MR equipment in order to improve its metrological characteristics. This work describes in detail both the improvements of the MSU-MR equipment already tested during flight tests (expansion of the temperature measurement range, remote adjustment of the parameters of electronic signal generation paths and of the temperatures of black body simulators, refinement of the method of laboratory focusing) and of the equipment yet to be subject to flight tests (remote focusing, increasing the cooling capacity of the radiator of the black body simulator, as well as a number of others).