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为了提高遥感影像产品的定位精度,研究了星敏感器主光轴和遥感相机主光轴交联角的在轨检校方法。利用高分辨率卫星遥感影像的严格成像模型,将改进的非直接求解模型引入到遥感相机安装误差的标定中,提出一种对遥感相机内外方位元素进行统一检校的方法,实现了星上姿态确定系统和遥感相机之间系统误差的精确补偿。对来自遥感卫星的整轨遥感图像进行处理,利用最优化模型确定遥感相机和星敏感器姿态关系矩阵,进而检校出交联角。最后,利用单像对地目标定位原理,对检校精度进行了验证。实验结果表明,校正后地面点经纬度方向平面位置RMS误差分别为9.31m和9.28m,显示通过内外方位元素统一检校,遥感图像的定位精度得到显著提高。
In order to improve the positioning accuracy of the remote sensing imagery products, the in-orbit calibration method of the main optical axis of the star sensor and the main optical axis of the telemetry camera is studied. Using the rigorous imaging model of high-resolution satellite remote sensing images, the improved non-direct solution model is introduced into the calibration of remote sensing camera installation errors. A method of uniform calibration of the inner and outer azimuth elements of remote sensing cameras is proposed, Determine the precise compensation for systematic errors between the system and the remote sensing camera. The whole orbit remote sensing images from remote sensing satellites are processed, and the optimization model is used to determine the attitude relation matrix of the remote sensing camera and the star sensor, and then the cross-linking angle is calibrated. Finally, the accuracy of calibration is verified by using the principle of single-target-to-ground target location. The experimental results show that the RMS errors of the ground plane in the latitude and longitude direction of the corrected ground plane are 9.31m and 9.28m respectively, which shows that the positioning accuracy of the remote sensing image is significantly improved through the unified calibration of the inner and outer azimuth elements.