Geometric accuracy improvement and verification of remote sensing image product for the ZY-3 surveying and mapping satellite

Xia Wang; Ping Zhou; Li Guo

doi:10.1117/12.2222199

9 December 2015 Geometric accuracy improvement and verification of remote sensing image product for the ZY-3 surveying and mapping satellite

Xia Wang, Ping Zhou, Li Guo

Author Affiliations +

Proceedings Volume 9808, International Conference on Intelligent Earth Observing and Applications 2015; 980827 (2015) https://doi.org/10.1117/12.2222199
Event: International Conference on Intelligent Earth Observing and Applications, 2015, Guilin, China

Abstract

Based on the geometric characteristic of ZY3 surveying and mapping satellite, this paper analyses the main error sources of the geometric accuracy of ZY3 satellite image product, and proposes a key technique to improve the accuracy of geometric positioning of ZY-3 satellite image products without the Ground Control Points. Firstly, 556 ZY-3 satellite images distributed in the central western China, with an area of 350 million km², were used for the planar positioning accuracy verification. The results show that the planar accuracy of ZY-3 image without the GCPs is about 10.8 meters (1σ), and more than 96.9% of experimental image without the GCPs have the planar accuracy higher than 25 meters. Subsequently, the Digital Surface Model (DSM) produced by the ZY-3 three linear array image in Shanxi without the GCPs and the high-precise Lidar-DEM were compared. The comparison shows that overall vertical accuracy of DSM is higher than 6 meters (1σ), and higher than 5.5 and 6.4 meters (1σ) in plane and mountainous area respectively. So the validation confirmed the overall accuracy of ZY-3 satellite images, indicating that ZY-3 satellite can achieve a higher geometric accuracy.

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Xia Wang, Ping Zhou, and Li Guo "Geometric accuracy improvement and verification of remote sensing image product for the ZY-3 surveying and mapping satellite", Proc. SPIE 9808, International Conference on Intelligent Earth Observing and Applications 2015, 980827 (9 December 2015); https://doi.org/10.1117/12.2222199

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KEYWORDS

Satellites

Satellite imaging

Earth observing sensors

Imaging systems

Cameras

Global Positioning System

Calibration

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