Algorithm Adjustment for Recovering Precipitation Based on MTVZA-GYa No. 2-2 Measurements

Abstract—An adjusted algorithm for reconstructing the intensity of precipitation over the ocean surface based on MTVZA-GYa 2-2 data is presented. Based on the studies on data georeferencing and the convergence of the beams of the MTVZA-GYa antenna system, the weight coefficients of the approximating functions for the scattering index and precipitation intensity are recalculated. A qualitative analysis of the data for 2020 has shown that the precipitation intensity is reconstructed adequately and agrees with the measurements of other satellite instruments. The quantitative analysis has shown that precipitation according to MTVZA-GYa data can be reconstructed in the entire range. However, reliable data can be obtained with an accuracy of ~50% only in the range of up to 25 mm/h. In a precipitation range of more than 25 mm/h, there is little data for comparison and the statistics are unreliable. Based on the results of the qualitative and statistical comparison, it can be concluded that the accuracy of reconstructing the precipitation intensity according to the MTVZA-GYa instrument is comparable to the accuracies for the AMSR-2 and SSMIS devices.