Abstract
The article discusses a method of vicarious data calibration of the MSS sensor of the Kanopus-V spacecraft based on the observation of RadCalNet polygons in the 2018–2020 period. The technique includes the stage of processing ground-based RadCalNet measurements for the period, with the aim of analytical approximation of the time series to ensure its continuity when compared with the MSS imagery of the Kanopus-V spacecraft constellation. The second stage evaluates the multiplicative and additive correction of the absolute calibration parameters for each of the constellation sensors based on the array of MSS observations and RadCalNet measurements. At the third stage, the assessment of the comparability of measurements by the MSS radiometer of the Kanopus-V spacecraft constellation is carried out on the basis of the results of surveying of natural calibration sites. The results obtained demonstrate a significant improvement in the comparability of measurements with the MSS radiometer within the constellation: the spread of the systematic measurement error was reduced by more than 2–3 times (depending on the spectral channel).
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