Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2021, Vol. 18, No. 2, pp. 75-81
Correction of automatic image georeferencing for the KMSS-2 multispectral satellite imaging system on board Meteor-M No. 2-2 satellite
B.S. Zhukov
1 , T.V. Kondratieva
1 , I.V. Polyanskiy
1 1 Space Research Institute RAS, Moscow, Russia
Accepted: 10.02.2021
DOI: 10.21046/2070-7401-2021-18-2-75-81
The KMSS-2 multispectral satellite imaging system on board Meteor-M No. 2-2 satellite consists of two MSU-100TM cameras with a nadir resolution of 55 m and a total swath of more than 1000 km. Geographic referencing of KMSS-2 images is performed automatically based on the accompanying navigation information and on the camera geometric calibration. In case of errors in the navigation information, geo-referencing errors of KMSS-2 images up to many hundreds of meters may occur. For their operative correction, the bank of Landsat ground control points (GCP) is used. Geo-referencing was checked and refined for 518 KMSS-2 frames with a size of 7984×9000 pixels on 207 imaging tracks that were acquired over Eurasia from July 2019 to July 2020. In total, more than 80 thousand GCPs were recognized in the images, mainly located on sea coastline and on rivers and lakes. Most of the Landsat GCPs located on land were not identified due to seasonal and inter-annual changes in the land cover, as well as due to the difference in the spectral bands of the KMSS-2 and of the reference GCP images. In most cases, the errors of KMSS-2 automatic geo-referencing based on the navigation information, which were estimated and corrected by this method, did not exceed 60 m, however, anomalous errors of up to 600 m were also recorded.
Keywords: KMSS-2, Meteor-M No. 2-2, image georeferencing, ground control points
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