SPOT5无控制和基于严密成像模型定位的研究

Research on Positioning under no GCPs and Based on the Strict Imaging Model

以SPOT5高分辨率遥感影像为例,充分利用SPOT5辅助数据文件(Metadata.dim)中的位置和姿态数据,采用精确拟合推算出影像外方位元素的初值,通过一定的地面控制点,以经典的多中心投影共线方程作为条件,建立条件方程式,进行条件平差,解算出一个修正的矩阵,该矩阵包含了相机与卫星平台之间的夹角,以及轨道等多种因素所引起的误差,然后利用建立的模型进行定位。与SPOT5无控制定位相比,该方法对定位精度有显著改善。

This paper uses the positions and attitudes of SPOT 5 g dim document , adopts the precise arithmetic to get the initial values of the exterior orientation, then establishes the condition equations to calculate a modificatory matrix which contains multi - errors caused by orbit and the angle between camera and satellite roof . The next step is using the model to locate the ground points. This method improves the precision of positioning greatly.