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The North Warning System (NWS, French: Système d'alerte du nord) is a joint United States and Canadian early-warning radar system for the atmospheric air defense of North America. It provides surveillance of airspace from potential incursions or attacks from across North America's polar region.
The AN/FPS-117 is an L-band active electronically scanned array (AESA) 3-dimensional air search radar first produced by GE Aerospace in 1980 and now part of Lockheed Martin. [1] [2] The system offers instrumented detection at ranges on the order of 200 to 250 nautical miles (370 to 460 km; 230 to 290 mi) and has a wide variety of interference and clutter rejection systems.
Due to extreme northern locations of some of these radars, the physics of radiowave propagation in the 1215–1400 MHz frequency range is even more critical for target detection requirements. The AN/FPS-124 is intended to cover any surveillance gaps left by the North Warning System's long range radar, the AN/FPS-117.
It is the second most powerful phased array radar system in the US Space Force's fleet of missile warning and space surveillance systems, behind the more modern PAVE PAWS phased array radar. PARCS was built by General Electric as the Perimeter Acquisition Radar (PAR), part of the US Army's Safeguard Program anti-ballistic missile system.
With the signing of the North American Air Defence Modernization agreement at the "Shamrock Summit" between Canadian Prime Minister Brian Mulroney and U.S. President Ronald Reagan in Quebec City on 18 March 1985, the DEW Line began its eventual upgrading and transition, becoming the North Warning System (NWS) of today. The intermediate sites ...
The second system would have been located in the south and together the PAVE PAWS sets would have provided Taiwan with 360-degree coverage. [59] The radar site in Taiwan sits on top of a mountain at an elevation of over 2,600 m (8,500 ft). [60] Due to its extremely elevated position the Taiwanese set has the unique ability to track surface ships.
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The AN/FPS-19 was a long-range search radar developed for the NORAD Distant Early Warning Line (DEW Line) by Raytheon. It was an L-band system working between 1220 and 1350 MHz produced by a 500 kW magnetron. Two such systems were placed back-to-back, one with an antenna that produced a narrow beam to improve range for long-range detection, and ...