目前面向城市区域DSM提取的甚高分辨率卫星影像主要由美、法等国的卫星提供。通过分析已有甚高分辨率立体测绘卫星影像的技术指标和立体构建模式，对关键技术指标和典型立体模式进行严密的仿真和精度验证，无疑会对我国的甚高分辨率立体测绘卫星设计提供非常有益的参考。本课题采用两种类型的基础数据进行仿真：一种是城市地区的高精细度地面模型，另一种是几何、辐射指标均高于仿真对象的甚高分辨率卫星立体影像。研究卫星影像的静态MTF、信噪比、几何分辨率、基高比、姿态稳定度等关键技术指标及不同视角组合的数学建模和仿真方法。DSM的精度是卫星立体影像几何、辐射精度的综合反映，基于鲁棒性极强的全局优化匹配算法对仿真影像进行立体匹配，进而生成DSM，与参考DSM或几何模型进行比较并统计几何精度。从而建立起卫星技术指标、工作模式与DSM精度的直接关联，为卫星技术指标设计提供定量分析的技术手段。

Currently, very high-resolution satellite images for urban areas DSM extraction mainly provided by satellites of the United States, France and other countries.It will undoubtely provide very useful reference to the very high resolution stereo mapping satellites designed of our country by analyzing the existing very high resolution stereo mapping satellite imagery technical indicators and stereo constructing modes, implementing rigorous simulation and accuracy verification aiming key technical indicators and typical stereo modes. This issue will use two.kinds of baisc data. One is high fineness ground model of urban area, another is very high resolution setellite stereo images whose geometric and radiation indicators are better than the simulated one. Research on mathematical modeling and simulation method in the aspect of MTF,SNR,geometric resolution,baseline,attitude stability and different looking angle combination. The accuracy of DSM is a comprehensive reflection of geometric precision and radiation precision. Implement stereo metching by robust global matching method.and generate DSM, statistic geometric accuracy of DSM by comparing with reference DSM or geometric model. So as to establish the association between technical indacators, working mode and accuracy of DSM, and provides quantitative analysis method for satellite technical indicators design.