A general bistatic SAR focusing algorithm for azimuth variant and invariant configurations

This paper presents a general bistatic SAR focusing algorithm for azimuth variant and invariant configurations. The approach used in this paper is based on Loffeld´s Bistatic Formula (LBF). We considered different azimuth contributions of the transmitter and the receiver phase terms in the derivation of the Bistatic Point Target Reference Spectrum (BPTRS). An efficient focusing algorithm is implemented using Scaled Inverse Fourier Transformation (SIFT) and is verified with focusing results of azimuth variant and invariant configurations.