Radar stands for "Radio Detection and Ranging". It is the system that operates within the UHF (ultra-high-frequency) or microwave a part of the radio-frequency (RF) spectrum, and is employed to observe the position and/or movement of objects. Radar systems are mostly employed in air-traffic control, aircraft navigation, and marine navigation. In its simplest form, a radar consists of a transmitted radio wave aimed by an antenna in a specific direction, and a receiver that detects the echoes off any objects within the path of the signal.
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