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The D model had height-finder capability. Westinghouse also built ARSR-4 3-D air surveillance radar in the 1990s for the JSS. By the late 1990s, this radar had replaced most of the 1960s-vintage AN/FPS-20 variant search radars and a number of ARSR-3 search radars under the "FAA/Air Force Radar Replacement" (FARR) program.
The ARSR-4/FPS-130 is a 3-D long range radar with an effective detection range of some 250 miles and has been fully integrated with JSS at all joint use sites. These radars are generally unattended except for periodic FAA maintenance crews which visit the sites as necessary.
Mill Valley Air Force Station' received an AN/FPS-8 in 1955 (subsequently converted to an AN/GPS-3), and during 1956 an AN/FPS-4 height-finder radar operated (superseded by an AN/FPS-6 in 1958.) Mill Valley began operating an AN/FPS-7 search radar 1 in 1960 at facility built in 1959 by the General Electric company. [12]
The FAA replaced the AN/FPS-7E with an ARSR-3 search radar, leaving the Air Force only responsible for the height-finder tower (by then an AN/FPS-116), which was removed c. 1988. In the late 1990s, the ARSR-3 was replaced by the ARSR-4. Today Mount Laguna is an FAA site, tied into the Joint Surveillance System (JSS). The former Air Force ...
As an AC&W radar station, the facility provided radar tracks for a Manual Air Defense Control Center to direct Ground control interception (GCI) of unidentified aircraft. The Air Force Station was upgraded to designation P-39 with a single AN/FPS-3 radar in May 1952 and an AN/FPS-4 height-finding radar the following year.
After shutdown in 1992, this radar was moved to Murphy Dome Air Force Station, Alaska. Radar coverage for the Philadelphia area was assumed by the FAA's site at Trevose, PA. Then, a portion of the Gibbsboro site was transferred to the FAA in 1995 for installation of an ARSR-4 set, and the Trevose site was shut down. Today what was Gibsboro AFS ...
The radar site was turned over to the FAA, however a small detachment from McChord AFB was assigned to maintain the radars. The AN/FPS-116 was retired c. 1988. In the latter 1990s, the AN/FPS-91A was replaced by an FAA-operated ARSR-4 radar. The FAA now the radar at the site as part of the Joint Surveillance System (JSS).
Watford City Air Force Station is a joint United States Air Force and Federal Aviation Administration installation located about 40 km southwest of Watford City, North Dakota. It is the site of an ARSR-4 radar system, which provides air traffic surveillance along the US-Canada border, as well as limited weather radar data.