Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2025, Vol. 22, No. 1, pp. 315-326
Meteorological satellite Meteor-M No. 2-3: Preliminary results of microwave sensing of the Earth
I.A. Barsukov
1 , L.M. Mitnik
2 , V.V. Boldyrev
1 , V.P. Kuleshov
2 , S.A. Grishunin
1 , G.E. Evseev
1 , M.L. Mitnik
2 , A.V. Baranyuk
2 , A.M. Sreltsov
1 1 JSC “Russian Space Systems”, Moscow, Russia
2 V.I. Il'ichev Pacific Oceanological Institute FEB RAS, Vladivostok, Russia
Accepted: 05.12.2024
DOI: 10.21046/2070-7401-2025-22-1-315-326
The characteristics of the meteorological satellite Meteor-M № 2-3, equipped with the advanced microwave radiometer MTVZA-GYa (Microwave Atmospheric Temperature and Humidity Sounding Module, GYa — in memory of G. Ya. Gus’kov (1918–2002)), are discussed. The satellite was launched on June 27, 2023, from the Vostochny Cosmodrome into a circular sun-synchronous orbit at an altitude of 830 km. The radiometer’s 40 channels measure Earth’s outgoing radiation at frequencies ranging from 6 to 190 GHz. The swath width during conical scanning at an angle of 65° to the local normal is 1,750 km. Internal calibration to correct for variations in the gain coefficients of the MTVZA-GYa channels is performed on each scan. External calibration based on calculated brightness temperatures over homogeneous “hot” (tropical rainforests of the Amazon) and “cold” (the Southern Ocean under low wind and clear-sky conditions) reference areas ensures the conversion of measured antenna temperatures to brightness temperatures. Brightness temperature fields at various frequencies in vertical and horizontal polarizations were constructed in Mercator and polar projections. These fields provide insights into sea surface temperature, land and vegetation cover, wind speed over the ocean surface, and sea ice distribution in the Northern and Southern Hemispheres, as well as regions of intense cloudiness and precipitation in tropical and temperate latitudes. In interpreting MTVZA-GYa data, measurements from the satellite radiometer AMSR2 (Advanced Microwave Scanning Radiometer 2) were utilized. Observations at the new MTVZA-GYa frequencies show promise for detecting low liquid water content cloud cover over the ocean, as well as areas of deep convection and precipitation over both ocean and land.
Keywords: Meteor-M No. 2-3, microwave radiometer MTVZA-GYa, modeling, brightness temperature, global fields, deep convection, precipitation, Arctic, Antarctic, AMSR2, calibration, radio-frequency interferences
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