基于偏置矩阵的卫星遥感影像系统误差补偿

Redressing system error in satellite image based on bias matrix

针对在求解卫星遥感影像偏置矩阵的过程中没有考虑偏置角的物理意义,采用理论分析和试验的方法,在分析偏置矩阵中三个角元素对地目标定位精度的影响后,提出了求解偏置矩阵角元素的方法。将求解的偏置矩阵用于国产资源二号卫星遥感影像的几何纠正,在无地面控制情况下,对地目标定位精度达到了实地上的152.338m,很好地补偿了影像上的系统误差,显著提高了直接利用卫星系统参数进行对地目标定位的精度,从而验证了所提出偏置矩阵求解方法的正确性以及用其补偿卫星遥感影像系统误差的可行性。

For resolving the problem that the traditional method of computation bias matrix does not consider the physical meaning of the bias angles, based on analyzing the relation between the angle of bias matrix and the object location accuracy, the computational method ,with which the roll and pitch angle can be calculated in min sidelook mode and the yaw can be calculated in the max sidelook mode, is developed. Testing the computational method on two CBERS2 imageries in some area, the planimetric precision is 152.338m without GCP. The validity of the setover matrix has been verified. The results also show the potentiality of using this computational method for rectifying CBERS2 imagery and object location.