Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2024, Vol. 21, No. 3, pp. 61-70
Radiometric characteristics estimation of multispectral satellite imaging system KMSS-2 on board Meteor-M No. 2-3 satellite by comparison with data from MODIS/Aqua spectroradiometer during flight tests
T.V. Kondratieva
1 , B.S. Zhukov
1 , I.V. Polyanskiy
1 1 Space Research Institute RAS, Moscow, Russia
Accepted: 29.05.2024
DOI: 10.21046/2070-7401-2024-21-3-61-70
The multispectral satellite imaging system KMSS-2 is installed on hydrometeorological spacecrafts of the Meteor-M series, which was enlarged with another Meteor-M No. 2-3 spacecraft in 2023. As part of flight tests, images of natural ground test sites in Greenland and the Karakum Desert were obtained and used for radiometric quality estimation of KMSS-2 data and for their comparative analysis with data of spectroradiometer MODIS/Aqua (Moderate Resolution Imaging Spectroradiometer) of level L1B. For this purpose, reflectances of natural objects in the spectral channels of KMSS-2 and in the corresponding spectral channels of MODIS were compared. The results of preliminary analysis showed the necessity to correct the sensitivity coefficients of the KMSS-2 NIR (near-infrared) channels, which were obtained during KMSS-2 on-ground calibration, by as much as 16–17 %. In the red and green channels, the required correction did not exceed 1 % and was within the accuracy of the on-ground calibration. After the correction, the reflectance of bright terrestrial objects in the visible and NIR ranges calculated from KMSS-2 data correlates well with the corresponding MODIS measurements with a root-mean-squared (RMS) deviation within 0.013.
Keywords: KMSS-2, MSU-100TM, multispectral satellite imaging system, Meteor-M No. 2-3, MODIS, reflectance, in-flight radiometric calibration, radiometric cross-calibration, remote sensing of the Earth
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