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MADRE over-the-horizon radar at the NRL's Chesapeake Bay Detachment U.S. Navy Relocatable Over-the-Horizon Radar station. The most common type of OTH radar, OTH-B (backscatter), [3] uses skywave or "skip" propagation, in which shortwave radio waves are refracted off an ionized layer in the atmosphere, the ionosphere, and return to Earth some distance away.
An over-the-horizon radar sited in the USSR would help solve this problem, and work on such a system for this associated role started in the late 1960s. The first experimental system, Duga, was built outside Mykolaiv in Ukraine , successfully detecting rocket launches from Baikonur Cosmodrome at 2,500 kilometres (1,600 mi).
These systems are collectively known as over-the-horizon radars. Three systems are generally used; the most common uses the ionosphere as a reflector and beams the signal skyward and then listens for the tiny signals that are returned from the sky, others use a bistatic arrangement with distant antennas looking for objects that pass between ...
Predel-E (in Russian: Предел-Э [1]) is a Russian military over-the-horizon radar system shown since 2017, [2] designed to detect ships in coastal areas. [3]It was developed by Concern Morinformsystem-Agat, with at least one variant designed by NPP Salyut. [3]
AN/FPS-115 PAVE PAWS early warning radar system; AN/FPS-117 Long Range Solid-State radar; AN/FPS-118 Over-The-Horizon-Backscatter (OTH-B) radar; AN/FPS-120, part of the Solid State Phased Array Radar System (replaced BMEWS radars) AN/FPS-123(V3), part of the SSPARS (upgraded PAVE PAWS) AN/FPS-123(V7), part of the SSPARS (modified PAVE PAWS at ...
The Jindalee Operational Radar Network (JORN) is an over-the-horizon radar (OHR) network operated by the Royal Australian Air Force (RAAF) that can monitor air and sea movements across 37,000 square kilometres (14,000 sq mi). [citation needed] It has a normal operating range of 1,000–3,000 kilometres (620–1,860 mi). [1]
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Cobra Mist was the codename for an Anglo-American experimental over-the-horizon radar station at Orford Ness, England. [a] It was known technically as AN/FPS-95 and sometimes referred to as System 441a; a reference to the project as a whole. Cobra Mist was part of a small number of "Cobra" long-range surveillance radars operated by the United ...