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The detailed operational performance of coherent optical radars can often be dominated by speckle related phenomena. This paper reviews the basic aspects of speckle and describes a coherent laser radar that automatically maintains a speckle maximum in the receive aperture of a common transmit/receive telescope.
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Robert J. Mongeon, "Coherent Adaptive Speckle Tracking," Proc. SPIE 0300, Physics and Technology of Coherent Infrared Radar I, (30 April 1982); https://doi.org/10.1117/12.932593