Focusing bistatic SAR data in the wavenumber domain using linearized weighted LBF

A weighting solution based on the original Loffeld´s bistatic formula (LBF) is addressed briefly in this paper to deal with the cases with noticeable difference between transmitter and receiver´s velocities. The published LBF-based approaches use range blocks to deal with the range variance. Alternatively, a new wavenumber domain algorithm is proposed by using the linearization of bistatic range, which follows the same routine of the monostatic Omega-K algorithm. The approximation in this range linearization is examined with space-surface hybrid and airborne bistatic configurations. Due to large phase error for the airborne case, a second phase multiply have to be used in its focusing. This approach results in a good focusing performance over simulated data.