Moving targets are displaced in azimuth on a SAR map. A separate SAR-MTI process is therefore used for the detection and relocation of moving targets. Errors in estimating the angular positions of the detected moving targets are referred to as relocation errors.A two port interferometer antenna whose baseline lies along the flight direction allows the detection of slow moving targets that are otherwise masked by main lobe clutter.
A model for evaluating relocation errors in a twoport interferometer SAR-MTI scheme is developed. The effects of various parameters such as aircraft speed, antenna beamwidth, squint angle, radar PRF and the target to noise and clutter ratios are evaluated.
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