High-resolution missile-borne SAR image geometric correction algorithm based on coordinate mapping principle

With the advantages of all-weather high precision, synthetic aperture radar (SAR) has become an important technology of missile terminal guidance method. In order to achieve the scanning image of large scenes and high precision of target matching, the SPECAN algorithm which has an advantage of better real time is normally used in its imaging processing. This paper uses the idea of coordinate mapping by analyzing the SPECAN algorithm to put forward a kind of high-resolution missile-borne SAR image geometric correction method and this method is suitable for SPECAN algorithm in missile´s descending flight. And in the point target simulation experiments, by comparing the shifting and interpolation correction algorithm, it can verify the accuracy and superiority of this algorithm.