THE GEOMETRIC ACCURACY VALIDATION OF THE ZY-3 MAPPING SATELLITE
- 1Satellite Surveying and Mapping Application Center of National Administration of Surveying, Mapping and Geoinformation, No.28, Lian Hua Chi West Road, Beijing, China
- 2State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan university, Luo-jia-shan, Wuhan, China
Keywords: ZY-3, Mapping Satellite, Geometric Accuracy Validation, Rigorous Geometry Model, RFM
Abstract. ZiYuan-3 (ZY-3) mapping satellite is the first civilian high-resolution stereo mapping satellite of China. The satellite’s objective is oriented towards plotting 1:50,000 and 1:25,000 topographic maps. This article proposes ZY-3 mapping satellite Rigorous Image Geometry Model and Rational Function Model (RFM). In addition, this paper utilizes the image of the ZY-3 satellite with the region of flatlands, hills and mountains for the block adjustment experiment. Different ground control points are selected and the accuracy is validated by check points, and the some Digital Surface Model (DSM), Digital Orthophoto Map (DOM) are generated and the accuracy is also validated by check points. The experiment reveals that the planar accuracy of DOM and vertical accuracy of DSM are better than 3m and 2 m, respectively. The experiment demonstrates the effectiveness of ZY-3 mapping satellite image geometry model.