On-Orbit Geometric Calibration Model and Its Applications for High-Resolution Optical Satellite Imagery

摘要: On-orbit geometric calibration is a key technology to guarantee the quality of high-resolution optical satellite imagery. In this paper, we present an approach for on-orbit imagery, focusing on two core problems: constructing model and proposing robust calculation method. First, rigorous imaging constructed based analysis major error sources. Second, construct through performing reasonable optimizing parameter selection model. On basis, parameters are partially calculated with stepwise iterative method by dividing them into groups: external internal parameters. Furthermore, verify effectiveness proposed methodology, experiments ZY1-02C panchromatic camera ZY-3 three-line array conducted using reference data Songshan test site located in Henan Province, China. The experimental results demonstrate certain deviation result from initial design values Therefore, necessary other hand, choosing multiple images, which cover different areas acquired at points time their accuracy before after calibration, find that these images without ground control significantly improved. Additionally, due effective elimination distortion camera, greater was achieved less than calibration.