为实现对拍摄区域目标准确与快速的定位, 提出一种针对仅依靠宽幅面阵航空相机进行无源目标定位的定位算法.利用与相机刚性连接的定位定向系统测量相机曝光时刻的位置与姿态信息, 恢复摄影光束的空间位置.选取适当的物方坐标系, 通过坐标变换建立共线方程, 利用单幅相片辅以地面高程信息求解目标的大地坐标信息.分别采用全微分法与蒙特卡洛法建立误差模型并进行仿真计算.采用某相机挂飞数据验证算法的有效性, 在飞行高度为5 000 m时, 定位精度可以达到30 m以内, 精度指标满足工程需要.

In order to acquire the geographic location information of the target zone accurately and quickly, the location algorithm was developed for width area-array aerial camera processing passive target location. The paper uses camera′s position and attitude information measured by position and orientation system which was rigidly connected with camera to regain beam′s space position. Then paper chooses the suitable object coordinate system and builds collinearity equation by coordinate transformation to calculate the location information by single photo and target elevation information. Error model is built and simulated by total differential method and Monte-Carlo method respectively. The geo-location algorithm is verified by the flight test, when the plane flies at an altitude of 5 000 m, the location error is less than 30 m, which meets the requirement of the project.