In-orbit geometric calibration of multi-linear array optical remote sensing satellites with tie constraints.

When some sub-images lack ground control points (GCPs) or GCPs are not evenly distributed, the estimated camera parameters are often deviated in in-orbit geometric calibration. In this study, a feasible in-orbit geometric calibration method for multi-linear array optical remote sensing satellites with tie constraints is presented. In the presented method, both GCPs and tie points are employed.