On-orbit calibration of the “Meteor-M” microwave imager/sounder

Multichannel microwave radiometer MTVZA-GY onboard of meteorological satellite Meteor-M N 1 performs carries out measurements of outgoing radiation of the atmosphere-underlying system. Both internal and external calibrations of the measured radiation as well as the results of numerical integration of microwave radiative transfer equation are used to derive brightness temperatures T_Bs at vertical (V) and horizontal (H) polarizations at MTVZA-GY frequencies. Radiosonde data for T_Bs modeling and comparison with the measured values were selected for various physical-geographical regions. The spatial structures of the marine weather systems measured by MTVZA-GY and AMSR-E were mainly similar. Their differences were due to the differences in the incidence angle: 55° for AMSR-E and 65° for MTVZA-GY.