Focusing of tandem bistatic SAR data using range Doppler algorithm

In this paper, we develop a range Doppler algorithm (RDA) for the tandem bistatic synthetic aperture radar (BiSAR) configuration. The key step is to use an analytical tandem bistatic spectrum. The proposed algorithm is able to handle reasonably high squint by compensating secondary range compression in the two-dimensional wavenumber domain, and is more robust to focus bistatic data compared with Neo´s RDA based on the spectrum of method of series reversion (MSR) in the tandem configuration particularly when the baseline-range ratio is large. The effectiveness of the proposed algorithm is verified by simulations.