Forward-looking bistatic SAR range migration alogrithm

Forward-looking bistatic synthetic aperture radar (FL-BSAR) owns smart space-variant geometry feature, so it is difficult to use precise monostatic SAR frequency domain imaging algorithms, such as range migration algorithm (RMA). In this paper, according to the geometry configuration of FL-BSAR, in each pulse repetition interval, the slant range was compensated precisely, then through the coordinate rotation, the FL-BSAR is transformed into the equivalent squinted SAR. Using the principal of stationary phase (PSP), the data is transformed into the frequency domain and range migration imaging algorithm (RMA) can be used. Meanwhile the simulation results demonstrated the phase error after compensation can be ignored.