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Auto-registration imaging algorithm for airborne dual-antenna interferometric SAR

In order to reduce the complex image registration process for the airborne dual-antenna interferometric SAR (InSAR) system, a new auto-registration imaging algorithm is presented in the paper, which implements the registration step directly at the SAR raw data processing stage based on the EOK algorithm and the ECS algorithm. For the mismatch caused by the path difference of two antennas, it realizes the precision registration of interferometric image in the range by means of high degree polynomial approximation using scaling principle and shifting compensation in course of the imaging procedure. Finally, through the processing of the real interferometric data, better interferograms are obtained and the validity of the algorithm proposed in the paper is proved.