over-the-horizon radar


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over-the-horizon radar

[′ō·vərthə hə′rīz·ən ′rā‚där]
(electromagnetism)
Long-range radar in which the transmitted and reflected beams are bounced off the ionosphere layers to achieve ranges far beyond line of sight.

over-the-horizon radar

over-the-horizon radar
Principle of over-the-horizon radar.
A radar system that makes use of the atmospheric reflection and refraction phenomena to extend its range of detection beyond the line of sight. Targets can be detected by over-the-horizon radar thousands of miles away. Over-the-horizon radars may be either forward-scatter or back-scatter systems.
References in periodicals archive ?
has received an order for its RACE++(R) Series multicomputers from ONERA, the French Aeronautics and Space Research Agency, for a performance upgrade of the Nostradamus early warning over-the-horizon radar.
Among major programs are the Digital Scan Converter (DSC) systems aboard the Canadian Aurora maritime patrol aircraft; the United States Navy's Los Angeles Class submarine sonar upgrade program; the Australian Jindalee/JORN over-the-horizon radar network; and it has been selected by Ericsson Microwave for the multipurpose radar systems development for the Swedish Saab Gripen fighter aircraft.
The Aqua Marine provides detection of over-the-horizon radars, instantaneous 360[degrees] direction finding, automatic emitter identification, library generation and editing, fast threat warning and a host of other features.
showed interest in Australia's over-the-horizon radars, the Jindalee Operational Radar Network (JORN), which can be used to detect missiles, he said.
Both types of awareness can be achieved by various means, including space-based national sensors, maritime patrol aircraft (MPA), unmanned aerial vehicles, shore-based over-the-horizon radars, all-source intelligence, data links between netted forces, and shipboard sensors such as air- and surface-search radars and passive electronic surveillance systems.
On a smaller scale, the Wisconsin and Michigan-based PAVE PAWS, the largest over-the-horizon radars in the U.

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