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External Calibration of MTVZA-GYa Microwave Radiometer Measurements in Scanner Channels. Part 2. The Experiment

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Abstract

The external calibration of measurements in eight MTVZA-GYa scanner channels on board the Meteor-M No. 2-2 satellite in the frequency range of 10.6–36.5 GHz is carried out. The calibration is based on collocated AMSR2 measurements with a time difference within 10 minutes in the Arctic from March to November in 2020 and the results of brightness temperature (\(T_\mathrm{b}\)) model calculations. The results are summarized as coefficients for converting MTVZA-GYa antenna temperatures into \(T_\mathrm{b}\) in the linear approximation. The analysis of MTVZA-GYa and AMSR2 measurements for 10 months of 2020 over test sites above sea ice and seawater is performed. The results of the analysis indicate that the proposed calibration keeps unchanged the ratios of the MTVZA-GYa \(T_\mathrm{b}\) to the AMSR2 \(T_\mathrm{b}\) obtained from the model simulations. The results show no trends in the differences between the MTVZA-GYa \(T_\mathrm{b}\) and the AMSR2 \(T_\mathrm{b}\) for the considered 10 months, which confirms the stability of the onboard calibration of MTVZA-GYa.

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Authors and Affiliations

  1. Russian State Hydrometeorological University, 195196, St. Petersburg, Russia

    E. V. Zabolotskikh & E. A. Balashova

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  1. E. V. Zabolotskikh
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  2. E. A. Balashova
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Correspondence to E. V. Zabolotskikh.

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Translated from Meteorologiya i Gidrologiya, 2021, No. 11, pp. 47-55. https://doi.org/10.52002/0130-2906-2021-11-47-55.

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Zabolotskikh, E.V., Balashova, E.A. External Calibration of MTVZA-GYa Microwave Radiometer Measurements in Scanner Channels. Part 2. The Experiment. Russ. Meteorol. Hydrol. 46, 755–761 (2021). https://doi.org/10.3103/S1068373921110042

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  • DOI: https://doi.org/10.3103/S1068373921110042

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