radar horizon


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Related to radar horizon: Over the horizon radar

radar horizon

[′rā‚där hə‚rīz·ən]
(navigation)
The distance to which a radar's operation is limited by the quasi-optical characteristics of the radio waves employed.

radar horizon

The line at which direct radar rays are tangential to the earth's surface. On the open sea, the radar horizon is horizontal, but, on land, it varies according to the topographical features of the terrain. The radar horizon is one of the determining factors for the limits of the pickup range of the radar. The radar pickup range in nautical miles is equal to the square root of 1.5 times the radar aerial height in feet.
References in periodicals archive ?
In 2006 Sanswire Networks (whose parent company is GlobeTel Communications) unveiled a 75-metre-long technology demonstrator for its Stratellite solar-powered communications platform, which was designed to cruise autonomously or as a remotely-piloted system at up to 65,000 ft, giving a radar horizon at around 300 nm.
By distributing sensor data to ships that are part of the network, CEC extends the range at which a ship can engage hostile missiles beyond the radar horizon.
The LRCR, a very-long-range decoy, implements "confusion defense," used before the encounter, when ships are below radar horizon. The long-range decoys are deployed within enemy's radar range and appear as legitimate targets on his tactical display.