In order to solve the ill-conditioned problem of the normal equation in the exterior orientation for linear pushbroom imagery, the combined ridge-stein combined estimator (CRS) is presented.

• 针对线阵推扫式影像外定向中存在的法方程病态问题,提出了采用岭压缩组合估计进行解算,能提高定向精度,并分析了该算法的优点和应用方法。