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Correction of Geographical Reference of the Microwave Scanner/Sounder MTVZA-GYa Operating on the Meteor-M Satellite No. 2–3
- Authors: Sadovsky I.N.1, Sazonov D.S.1
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Affiliations:
- Space Research Institute of the Russian Academy of Sciences
- Issue: No 6 (2024)
- Pages: 76-87
- Section: МЕТОДЫ И СРЕДСТВА ОБРАБОТКИ И ИНТЕРПРЕТАЦИИ КОСМИЧЕСКОЙ ИНФОРМАЦИИ
- URL: https://journals.rcsi.science/0205-9614/article/view/281647
- DOI: https://doi.org/10.31857/S0205961424060066
- EDN: https://elibrary.ru/RQRNNT
- ID: 281647
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Abstract
This work is focused on georeferencing of the measurements data of the Russian MTVZA-GYa scanner/sounder, installed on board the “Meteor-M” No. 2–3 spacecraft. This instrument was put into operation in August 2023 and continues to operate normally at present. The failure of the spacecraft’s centimeter communication line in October 2023 significantly reduced the coverage area of MTVZA-GYa measurements. Currently, it is limited to direct visibility of the satellite by ground-based receiving stations. The absence of all-season clear boundaries of the “sea/land surface” transition in the observation area makes it impossible to assess the quality and correct the georeference of MTVZA-GYa measurements. In this regard, within the framework of the presented paper, measurement data with global coverage over the globe, carried out by this instrument in August-September 2023, were analyzed. Based on positive experience with previous versions of MTVZA’s instruments, the authors used similar methods for assessing the georeferencing quality and searching for angles that correct it. At the same time, the existing design differences of the sample device under consideration (changed scanning directions, changed observation sectors) required some changes to be made to the algorithm for implementing georeferencing. Research has shown that the optical axes of this instrument, corresponding to individual groups of frequency channels, have different orientations. In this regard, the search for georeferencing-correcting angles was performed for each group separately. During performing a differentiated approach to georeferencing different groups of frequency channels using the found values of corrective roll, pitch and yaw angles, the authors managed to achieve the following accuracy indicators: for a group of channels 10.6–23.8 GHz – (4.59 ± 8.22) km; for a group of channels 31.5–48.0 GHz – (5.51 ± 8.83) km; for a group of channels 52 – 91.65 GHz – (8.03 ± 11.69) km.
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About the authors
I. N. Sadovsky
Space Research Institute of the Russian Academy of Sciences
Author for correspondence.
Email: ilya_nik_sad@mail.ru
Russian Federation, Moscow
D. S. Sazonov
Space Research Institute of the Russian Academy of Sciences
Email: ilya_nik_sad@mail.ru
Russian Federation, Moscow
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