An autofocusing approach for airborne/stationary bistatic SAR imagery based on acquired raw data

An autofocusing approach for airborne/stationary bistatic synthetic aperture radar (A/S BiSAR) imaging was proposed in this paper. In A/S-BiSAR, not only the motion induced phase error but also the inaccuracy of data acquisition geometry (DAG) would seriously degrade the quality of the image in focus. In the proposed method, both the motion error and the influence of the inaccuracy of DAG were considered, and the introduced phase error was estimated and compensated. Well focused results from the acquired raw data were obtained and analyzed which validates the effectiveness of the proposed method.