On-orbit Geometric Calibration of Linear Push-broom Optical Satellite Based on Sparse GCPs

作者：Yingdong PI,Baorong XIE,Bo YANG,Yiling ZHANG,Xin LI,Mi WANG

摘要：The paper presents a geometric calibration method based on the sparse ground control points (GCPs), aiming to the linear push-broom optical satellite. This method can achieve the optimal estimate of internal and external parameters with two overlapped image pair along the charge-coupled device (CCD), and sparse GCPs in the image region, further get rid of the dependence on the expensive calibration site data. With the calibrated parameters, the line of sight (LOS) of all CCD detectors can be recovered. This paper firstly establishes the rigorous imaging model of linear push-broom optical satellite based on its imaging mechanism. And then the calibration model is constructed by improving the internal sensor model with a viewing-angle model after an analysis on systematic errors existing in the imaging model is performed. A step-wise solution is applied aiming to the optimal estimate of external and internal parameters. At last, we conduct a set of experiments on the ZY-3 NAD camera and verify the accuracy and effectiveness of the presented method by comparison.

發文機構：School of Remote Sensing and Information Engineering Shanghai Aerospace Electronic Technology Research Institute State Key Laboratory of Information Engineering in Surveying Collaborative Innovation Center Of Geospatial Technology

關鍵詞：OPTICALSATELLITEon-orbitgeometriccalibrationoverlappedimagepairSPARSEGCPsviewing-angle

分類號： V44[航空宇航科學與技術—飛行器設計][航空宇航科學技術]