IMU/DGPS辅助ADS40影像直接定位及其精度分析  

IMU/DGPS Supported ADS40 Imagery Direct Georeferencing and Its Error Analysis

作　　者：刘军[1] 王冬红[1] 张永生[1] 王慧[1] 

机构地区：[1]信息工程大学测绘学院,郑州市陇海中路66号450052

出　　处：《武汉大学学报（信息科学版）》2008年第11期1138-1141,共4页Geomatics and Information Science of Wuhan University

基　　金：国家863计划资助项目(2006AA12Z154);信息工程大学测绘学院资助项目(Y0705)

摘　　要：阐述了IMU/DGPS辅助ADS40影像直接定位的基本方法,针对不同ADS40扫描条带采用不同的局部空间直角坐标系的现状,推导了航带间外方位元素的统一化处理算法。试验结果表明,ADS40影像直接定位的误差是系统性的,因此在生产作业中引入少量控制点参与平差仍是必需的。The theory of the direct georeferencing （DG） of ADS40 imagery supported by IMU/ DGPS system is introduced. According to the situation that different local space rectangular coordinates system have been adopted for different ADS40 strips, the equations to transform the exterior orientation elements of all strips to one ground frame are derived. Test results show that the DG error of ADS40 images is systematic, so bundle adjustment with the help of some control points is necessary in actual task. The method to unite exterior orientation elements of different strips and the conclusions from test will lay a foundation for the triangulation of ADS40 imagery.

关 键 词：IMU/DGPS ADS40 直接定位 外方位元素 局部空间直角坐标系 

分 类 号：P231.5[天文地球—摄影测量与遥感]