Formation Flying InSAR Configuration Error Simulation and Compensation

Configuration error for airborne formation flying InSAR was studied. The aircraft interval changes are the most important error. Interval decreasing is taken as an example. Phase changes with baseline changes were derived in formula. The simulation result of plane interval changes is given out. A pentahedron on flat ground is set to show influence of the configuration error. Correct phase compensation is the key technology to get accurate interferogram. So azimuth slope eliminating was adopted. Two control points were arranged in observing area to compensate the phase error introduced by configuration error. This algorithm can improve the DEM precision for whole area. The pentahedron terrain is employed to verify compensation algorithm. The simulation terrain and compensation results prove that the algorithm is effective and efficient.