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On the Possibility of Failures Indication in Operation of MTVZA’s Series Russian Scanner/Sounders Based on Georeference Quality Analysis
- 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 5 (2024)
- Pages: 74-81
- Section: МЕТОДЫ И СРЕДСТВА ОБРАБОТКИ И ИНТЕРПРЕТАЦИИ КОСМИЧЕСКОЙ ИНФОРМАЦИИ
- URL: https://journals.rcsi.science/0205-9614/article/view/281378
- DOI: https://doi.org/10.31857/S0205961424050052
- EDN: https://elibrary.ru/RRRXCB
- ID: 281378
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Abstract
The paper examines one of the consequences of a change in the normal operating mode of the Russian microwave scanner/sounder MTVZA-GYa – a significant decrease in the accuracy of georeferencing of this device measurements data, which took place in April 2022. Deterioration in accuracy was discovered during retrospective thematic processing of MTVZA-GYa data, at the stage of visual analysis of the input data quality. The detected displacement of radio thermal portraits relative to the real coastline was about 70 km. The analysis of the described changes was carried out in two stages. At the first of them, during manual review of measurement data from each half-orbit, it was possible to determine the failure’s time frame (from April 10 to May 25), and also to identify the main cause of the observed displacements - change in the yaw angle of the MTVZA-GYa. At the second stage, as a result of end-to-end machine processing of the daily composites, formed by the device, an accurate value of the changed angle was determined, amounted to (–2.64 ± 0.23)° (instead of that used in normal mode (–0.84 ± 0.15)°). The conducted studies demonstrated the possibility of using the algorithm for determining MTVZA-GYa georeference-correcting angles as an indicator of failures in the operation of individual systems of this instrument. The potential possibility of adjusting the georeferencing of MTVZA-GYa measurements in the event of such failures was also demonstrated. In particular, for the case considered in this work, it was possible to reduce the georeferencing error by almost 6 times.
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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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