Dependence of SAR azimuth image displacement of range moving scatterers on processor focal setting

Reappraises the principal theory on the azimuth displacement of the synthetic aperture radar (SAR) image of a point scatterer moving in the range direction with a constant velocity. New results are presented which describe the dependence of the image shift on the processor focal setting. It is shown that, provided the bandwidth of the processor is greater than or comparable to the bandwidth of the signal, there is a strong dependence of the azimuth image shift on the processor focusing. Simple geometric illustrations based on the optical processor are provided to interpret the effects