Brightness temperature modeling and first results derived from the MTVZA-GY radiometer of the Meteor-M No. 2-2 satellite

Abstract

Моделирование яркостной температуры и первые результаты, полученные микроволновым радиометром MTВЗA-ГЯ со спутника «Метеор-М» № 2-2 г. м. Чернявский 1 , л. м. митник 2 , в. п. кулешов 2 , м. л. митник 2 , а. м. Стрельцов 1 , г. е. евсеев 1 , и. в. Черный 1

Microwave Radiometer MTVZA-GY on New Russian Satellite Meteor-M No. 2-2 and Sudden Stratospheric Warming Over Antarctica

“…The effective field of view (EFOV) of the radiometer antenna varies from 133 × 297 km at ν = 6.9 GHz to 14 × 30 km at 91.65 GHz and to 9 × 14 km at 183.3 GHz [2]. The pixel size is 32 × 32 km for 6.9 to 48 GHz and near 183.3 GHz channels, 10 × 16 km at 91.65 GHz, and 48 × 48 km on all ten oxygen channels [1], [2]. The noise equivalent differential temperature (NEDT) was derived for the EFOV after averaging several pixels together.…”

“…The noise equivalent differential temperature (NEDT) was derived for the EFOV after averaging several pixels together. It was then converted to a single pixel or instantaneous field of view based on an integration time of 30 ms and a scene temperature of 300 K. The NEDT value of the imager channels is 0.3-0.6 K/pixel and that of the sounder channels is 0.4-1.7 K/pixel [1], [2]. The sounder channel characteristics are given in Table I.…”

“…The conical scanning at the incidence angle of θ = 65°provides the swath width of 2500 km in ascending orbits. In descending orbits, the inclination of the solar cells changes, which leads to a partial shadowing of the swath and reducing its width to 1500 km [1]. Multichannel MW measurements are the basis for simultaneous estimation of key geophysical parameters of the underlying surface (temperature T 0 , emissivity κ(ν), etc.)…”

“…The cold reference region was chosen over the cloudless ocean areas with weak winds and low values of atmospheric water vapor content around Antarctica. The brightness temperatures over the reference regions were determined by numerical integration of the MW radiative transfer equation in the underlying surface-atmosphere system [1], [2].…”

“…The values of T B V,H (ν) at the imager frequencies ν = 6.9, 10.65, 18.7, 23.8, 31.5, 36.5, 42, 48, and 91.65 GHz depend on both the surface and atmospheric parameters. The T B V,H (ν) fields give an insight into the spatial structure and variability of the parameters of tropical, extratropical, and polar cyclones;, fronts; intertropical convergence zone (ITCZ); atmospheric rivers; cold air outbreaks; and other weather systems [1], [2].…”