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A coherent ground map mode which provides higher azimuth resolution by processing the radar return signal phase to exploit the doppler dependency on azimuth angle.

The SAR mode is defined as having constant cross-range resolution, as opposed to the constant angular resolution of DBS. The SAR mode provides a small patch map and is useful for target recognition, aimpoint selection, etc. The display format is offset sector PPI. The SAR mode forms an image while the antenna is stabilized to point at the patch. The real beam antenna beamwidth limits the azimuth coverage and thus a mosaic of strips may be used to construct the composite image.