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提出了一种新的在轨标定相机交会角的方法,该方法不同于目前广泛采用的摄影测量中的后方交会。以三线阵CCD测绘相机为例,通过对其工作原理的分析,建立了求解相机交会角的几何模型,并利用天绘卫星三线阵影像数据进行了相关试验。结果表明,该方法可行,计算结果精度较高,与摄影测量方法所得结果非常接近。同时,计算分析了定轨精度和地面控制点精度对相机交会角精度的影响。相对于摄影测量的方法而言,该方法理论简单,易于理解,可进一步应用于高分辨相机和多光谱相机离轴角的在轨标定,具有重要意义。
A new method of intersecting cameras in on-orbit calibration camera is proposed, which is different from the backward rendezvous in photogrammetry which is widely used at present. Taking the three-line CCD mapping camera as an example, the geometric model of the camera intersection angle is established by analyzing the working principle of the camera. The experiments are carried out by using the image data of the three-line array satellite. The results show that this method is feasible and the accuracy of the calculation results is high, which is very close to that obtained by photogrammetry. At the same time, the influence of orbit determination accuracy and ground control point accuracy on the camera intersection accuracy is calculated and analyzed. Compared with photogrammetry, this method is simple in theory and easy to understand. It can be further applied to on-orbit calibration of high-resolution camera and multi-spectral camera off-axis angle.