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通过对天绘一号卫星摄影原理的分析,建立了在轨标定高分辨、多光谱相机与三线阵正视相机夹角的几何模型,并利用天绘卫星影像数据进行了相关试验。试验结果表明:该方法可行,精度较高,与可供参考的地面实验室定标结果较为接近,高分辨相机与三线阵正视相机夹角标定的两种结果相差1′左右,多光谱相机与三线阵正视相机夹角标定的两种结果相差5′左右。同时,计算分析了卫星定轨误差和地面控制点精度对夹角的影响。该方法模型简单,易于理解,解决了目前天绘一号卫星高分辨、多光谱相机与三线阵正视相机夹角仅有地面实验室标定结果,缺乏有效在轨标定方法的问题,对于影像的融合、纠正及高级产品的生产具有重要意义。
Based on the analysis of the photography principle of Tian-Hui-1 satellite, the geometrical model of the included angle between high-resolution and multispectral camera in-orbit calibration and the line-up camera was established. The related experiments were carried out by using the image data of Tian-Hui satellite. The experimental results show that the proposed method is feasible and accurate, which is close to the calibration results of the ground laboratory for reference. The results of the angle calibration between high-resolution camera and the front-facing camera are different by about 1 ’ Three-line array camera angle between the two results of a difference of about 5 ’. At the same time, the influence of satellite orbit error and ground control point accuracy on the angle is calculated and analyzed. The method is simple and easy to understand, and solves the problem that only the laboratory calibration results of the angle between the Tianmu-1 satellite high-resolution multi-spectrum camera and the three-line frontal camera at present are lacking and the method of on-orbit calibration is lacking. , To correct and produce high-level products of great significance.