中文摘要：

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。

英文摘要：

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.