利用卫星的辅助数据构建资源三号卫星影像的严格几何模型。以此为基础，考虑镜头光学畸变、像元尺寸变化和CCD旋转变化等因素的影响，构建附加参数模型；

同时构建轨道模型来描述影像的外方位元素变化特征，进行自检校光束法区域网平差。利用资源三号卫星实际数据对附加参数模型和轨道模型进行研究和优化，

并分析不同控制点分布对平差精度的影响。试验表明，选择合理的平差数学模型和控制点分布，平面精度可优于0.6?GSD，高程精度约为0.5?GSD。 

The rigorous geometric model of ZY03 imagery was constructed using auxiliary data. Then an additional parameter model was constructed on the base of the factors of sensor distortion, pixel size zooming, CCD circumvolution and so on. An orbit model was used to analyse the variational character of exterior parameters. Then a self-calibration bundle block adjustment model was constructed. Using ZY03 reality data, the additional parameter model and orbit model were researched and improved. The influence of different ground control points distributing was also researched. The experiment demonstrated that the planar accuracy and vertical accuracy are better than 0.6 GSD and about 0.5 GSD using right block math model and distribution of GCPS.