ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2021, Vol. 18, No. 1, pp. 19-30

Methodology for assessing the comparability of measurements by the MSS radiometer of the Kanopus-V satellite constellation based on the survey of natural calibration sites

A.S. Stremov 1 , A.I. Vasilyev 1 
1 Research Center for Earth Operative Monitoring of Russian Space Systems JSC, Moscow, Russia
Accepted: 26.01.2021
DOI: 10.21046/2070-7401-2021-18-1-19-30
The article considers the problem of assessing the comparability of measurements by the MSS radiometer of the Kanopus-V Earth observation satellite constellation. To assess the comparability of measurements, an experimental technique was proposed, in accordance with which a series of measurements (more than 120) of natural calibration sites Libya 4, Gobabeb, Niger was carried out for the period 2018–2020. Further, in result of data processing of the Kanopus-V MSS data in an automated mode, the spectral reflectance was calculated. Within the framework of the methodology, MSS measurements were normalized relative to the measurements of Sentinel-2 MSI for the same polygons and the same period under consideration. Thus, the invariance of observations to the characteristics of the surface of the calibration sites was achieved. The final results of comparing the data of Kanopus-V MSS and the Sentinel-2 MSI measurements demonstrate comparability between individual spectral bands measurements within 2 STD values of the MSI measurements. In addition, accuracy of reflectance measurements demonstrate the comparability (except for the RED band of Kanopus-V No. 1) within 1 STD value of the MSI measurements. At the same time, it is crucial to have additional intercalibration of sensors to ensure the comparability of measurements for all spectral bands of Kanopus-V MSS radiometers.
Keywords: Kanopus-V, MSS radiometer, Earth observation satellite constellation, Earth observation data comparability, natural calibration sites, Sentinel-2 MSI
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