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radar reconnaissance[′rā‚där ri′kän·ə·səns]
Reconnaissance by means of radar to determine the location, disposition, and strength of enemy forces, and to determine the nature of the terrain.
A method of reconnaissance carried out primarily by using suitable radar to obtain information on enemy activity and determine the nature of the terrain. Two of the most common tools for radar reconnaissance are the synthetic aperture radar (SAR) and the side-looking airborne radar (SLAR). See synthetic aperture radar and radar imagery.