Range-Doppler algorithm-based missile-borne SAR imaging with lateral avoidance trajectory

The general relative range model for non-linear trajectory is built firstly,followed by the maneuver induced phase errors analysis.The quantitative conditions of ignoring these errors are deduced later.Then this paper concerns on the issue of missile-borne SAR in the trajectory with lateral maneuver: the characteristics of signals are analyzed and a range-Doppler based algorithm is presented according to these characteristics.Compared with the range-Doppler algorithm under linear aperture,the new one just modifies some phase correction factors and needs no additional complexity owing to nonlinear aperture.