A SAR imaging algorithm for unparallel bistatic configuration

Bistatic SAR uses separated transmitter and receiver flying on different platforms, and has the ability of the exploitation of additional information contained in the bistatic reflectivity of targets. This paper provides an efficient Nonlinear-Chirp Scaling (NLCS) algorithm for arbitrary bistatic SAR configure, which is based on the bistatic-to-monostatic application (BTMA). The method described is a feasible solution for the image formation of bistatic SAR with unparallel bistatic configuration. The problem of Doppler ambiguity during the NLCS processing and the choice of reference frequency are also discussed at last. This NLCS imaging algorithm is verified with a simulation experiment.