Tang X.,Satelite Surveying and Mapping Application Center |
Zhang G.,Satelite Surveying and Mapping Application Center |
Zhang G.,Wuhan University |
Zhu X.,Satelite Surveying and Mapping Application Center |
And 5 more authors.
Cehui Xuebao/Acta Geodaetica et Cartographica Sinica | Year: 2012
The Ziyuan-3 (ZY-3) surveying satellite is the first civilian high-resolution stereo mapping satellite of China. Its objective is oriented to plot the 1:50000 and 1:25000 topographic maps. Comparing with foreign commercial mapping satellite imagery, the establishment of our own imaging geometry model is the core technical problem for different products and various applications of ZY-3 surveying satellite. This paper analyses the key problem on precision geometry processing based on the overall design, and proposes the ZY-3 surveying satellite imaging geometry model with the technology of virtual CCD line-array imaging. In addition, this paper utilizes the first orbit imagery of ZY-3 satellite with coverage of the region of Dalian, and produces forward, backward and nadir cameras calibration products. Different ground control points are selected for the block adjustment experiment, and the digital surface model (DSM), digital ortho map (DOM) are generated. The accuracy is validated by check points. It can be seen from the experiment that the planar and vertical accuracy are better than 3 meters and 2 meters, respectively. The experiment demonstrates the effectiveness of ZY-3 surveying satellite imaging geometry model.