Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2021, Vol. 18, No. 1, pp. 53-60
Interannual sensitivity trend of the cameras of the multispectral satellite imaging system KMSS-M on Meteor-M No. 2 spacecraft based on the in-flight calibration in 2015–2020
B.S. Zhukov
1 , T.V. Kondratieva
1 , I.V. Polyanskiy
1 1 Space Research Institute RAS, Moscow, Russia
Accepted: 01.12.2020
DOI: 10.21046/2070-7401-2021-18-1-53-60
Absolute radiometric calibration of the multispectral satellite imaging system KMSS on the Meteor-M series spacecraft is performed annually over the snow fields of Antarctica. This paper analyzes the interannual sensitivity trend of the MSU-201, MSU-202 and MSU-250 cameras, which are part of the KMSS-M on the Meteor-M No. 2 satellite, based on their calibration in 2015–2020. According to the calibration results, a trend towards a decrease in the cameras sensitivity is clearly seen, which amounted to 5–27 % over 5 years of observation, depending on the camera and channel. The greatest sensitivity degradation took place in the nadir-looking channel 1 of the cameras (spectral zones 0.63–0.68 μm for MSU-201 and MSU-202 and 0.37–0.45 μm for MSU-250), the least — in the forward-looking channel 1 of MSU-201 and MSU-202 (0.755–0.87 μm) and in the backward-looking channel 3 of MSU 250 (0.58–0.69 μm). The results confirm the need for a regular in-flight absolute radiometric calibration of the satellite imaging systems to maintain the radiometric quality of their data.
Keywords: multispectral satellite imaging system, KMSS-M, Meteor-M No. 2, in-flight radiometric calibration, camera sensitivity
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