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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. 43-52

Scientific approaches for increase of georeferencing accuracy of images from high resolution optoelectronic Earth remote sensing spacecrafts

R.N. Akhmetov 1 , A.V. Filatov 1 , G.N. Myatov 1 , A.A. Yudakov 1 , A.S. Nonin 1 , A.N. Kozlov 1 , Ya.M. Klebanov 2 , V.V. Eremeev 3 , A.E. Kuznetsov 3 
1 Space Rocket Centre “Progress”, Samara, Russia
2 Samara State Technical University, Samara, Russia
3 Ryazan State Radio Engineering University named after V. F. Utkin, Ryazan, Russia
Accepted: 27.11.2020
DOI: 10.21046/2070-7401-2021-18-1-43-52
Currently operated high-resolution optoelectronic Earth remote sensing (ERS) spacecrafts provide users with information with spatial resolution less than one meter and georeferencing accuracy within several meters. In the near perspective there are plans to launch a new generation of domestic super-high-resolution ERS spacecrafts with improved performance characteristics which require development of new scientific applied approaches to design and testing of ERS spacecrafts. One of the most significant performance characteristics of an ERS system is accuracy of georeferencing of objects in images. An approach to increase this accuracy is described in the present work. The approach is based on strict mathematical description of coordinate dependency between ground points and points in the obtained picture; on systematic monitoring and calibration of on-board measurement equipment and main imaging payload; utilization of spacecraft structure thermodeformation models. The results of experimental research on identifying the main factors impacting accuracy of georeferencing are presented: accuracy of spatial and angular position of spacecraft, relative changes of interior angles of imaging and measurement equipment, geometrical instability of structure parameters of spacecraft. These results are based on statistically reliable information gathered during exploitation of the Resurs-P and Aist-2D satellites. As a result, the accuracy of georeferencing (RMSE) of data from Resurs-P No. 2 and 3 is 7–9 m.
Keywords: Earth remote sensing, optoelectronic telescopic complex, georeferencing accuracy of objects
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