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AN/FPS-26 Radar

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Cold War-era American height finder radar

AN/FPS-26
Country of origin	United States
Type	Height-Finder Radar
Frequency	5400 to 5900 MHz^[1]
Power	~5 megawatts (peak)^[2]^{[verification needed]}

TheAvco AN/FPS-26 Radar was anAir Defense Command height finder radar developed in theFrequency Diversity Program with a tunable 3-cavity powerklystron forelectronic counter-countermeasures (e.g. to counter jamming). Accepted by theRome Air Development Center on 20 January 1960^[3] for use atSAGE radar stations, the AN/FPS-26 processed height-finder requests (e.g., fromAir Defense Direction Centers) by positioning to the azimuth of a target aircraft using a high-pressure hydraulic drive, then "nodding" in either a default automatic mode or by operator command. The inflatable radome required a minimum pressure to prevent contact with the antenna which would result in damage to both (technicians accessed the antenna deck via an air lock.) To maintain high dielectric strength, the waveguide was pressurized withsulfur hexafluoride (SF₆), which technicians were warned would produce deadly fluorine if waveguide arcing occurred.^[4]

FPS-26 units were installed at Luke AFB, MacDill AFB (1961),Hunter AFB (1961),Chandler AFS (1961),Baudette AFS (1963),Las Vegas Air Force Station (1963),Montauk AFS,Lockport AFS (1962),Fort Fisher AFS (1962),Winston-Salem AFS (1962),North Charleston AFS (1961),Aiken AFS, andSundance AFS.^[1] Charleston AFS, Charleston, ME (exact date of installation unknown some time between 1961–1963) Acme Missiles & Construction Corp.,Rockville Centre, N.Y. built the radar tower facilities at Missile Master, Pittsburgh Defense Area, Oakdale, Pa.^[5]

In accordance with theJoint Electronics Type Designation System, the radar's "AN/FPS-26" designation represents the 26th design of an Army-Navy fixed radar(pulsed) electronic device for searching.^[1]^[6]

Variants

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A variant was the AN/FPS-26A with better ECCM capabilities.^[7] which was installed atCambria AFS (1963),Klamath AFS (1963),Point Arena AFS,Boron AFS,Hutchinson AFS,North Truro AFS (1963),Calumet AFS,Selfridge AFB,Empire AFS (1963),Finland AFS (1963),Fortuna AFS,Opheim AFS,Highlands AFS,Gibbsboro AFS (1963),Watertown AFS (1963),Saratoga Springs AFS (1963),North Bend AFS,Mt. Hebo AFS,Benton AFS (1963),Oakdale AFS,St. Albans AFS (1963),Manassas AFS (1963),Cape Charles AFS (1963),Minot AFS, andMakah AFS.^[1] Also installed atPort Austin AFS unknown date.

In July 1965 for missile warning the AN/FPS-26 was modified to theAvco AN/FSS-7 SLBM Detection Radar for theAVCO 474N SLBM Detection an Warning System.^[1]

The foreground radome with dark-clad support structure houses a USAF AN/FPS-26A just completing constructionc. late 1962 at the Missile Master military installation atFort Lawton Air Force Station, which had a Direction Center in the nuclear bunker. The two radars without radomes are US ArmyAN/FPS-6 heightfinders; the radome with an open steel grid support structure is anFAA search radar; and the two radars with radomes and white clad support structures are USAF AN/FPS-6A heightfinders.

References

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^^a ^b ^c ^d ^eWinkler, David F. (1997). "Radar Systems Classification Methods".Searching the Skies: The Legacy of the United States Cold War Defense Radar Program(PDF). Langley AFB, Virginia: United States Air Force Headquarters Air Combat Command. p. 73.LCCN 97020912.
^http://www.radomes.org/museum/equip/fps-26.html AN/FPS-6 @ radomes.org
^Smith, John Q.; Byrd, David A (c. 1991).Forty Years of Research and Development at Griffis Air Force Base: June 1951 – June 1991 (Report). Rome Laboratory. Archived fromthe original on April 8, 2013. Retrieved2014-03-10.
^"Radar Handbook"(PDF).geo.uzh.ch. 1990. Retrieved27 June 2023.
^Missiles and Rockets, April 17, 1961, p. 50.
^Avionics Department (2013). "Missile and Electronic Equipment Designations".Electronic Warfare and Radar Systems Engineering Handbook(PDF) (4 ed.). Point Mugu, California: Naval Air Warfare Center Weapons Division. pp. 2–8.1.
^^{[full citation needed]} This article incorporatespublic domain material from the Air Force Historical Research Agency

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Squadrons	Aerospace Defense Command Fighter Squadrons Aircraft Control and Warning Squadrons

Major
weapon
systems

Electronic	TB-29 EB-57 EC-121
Fighters	Propeller: F-47 F-51 P-61 F-82 Subsonic Jet: P-80 F-84 F-86 F-89 F-94 Supersonic Jet: F-101 F-102 F-104 F-106
Missiles	AIM-4 AIM-26 AIR-2 CIM-10
Ships	Guardian Interceptor Interdictor Interpreter Investigator Locator Lookout Outpost Pickett Protector Scanner Searcher Skywatcher Tracer Watchman Vigil
Texas Towers	Texas Tower 2 Texas Tower 3 Texas Tower 4

Miscellaneous

Air Defense Command Emblem Gallery (on Wikimedia Commons)
General Surveillance Radar Stations

v t e US Air Force Ground-based search radars
AN/FPS-3 AN/FPS-4 AN/FPS-5 AN/FPS-6 AN/FPS-7 AN/FPS-8 AN/FPS-10 AN/FPS-12 AN/FPS-14 AN/FPS-16 AN/FPS-17 AN/FPS-18 AN/FPS-19 AN/FPS-20 AN/FPS-23 AN/FPS-24 AN/FPS-26 AN/FPS-27 AN/FPS-30 AN/FPS-35 AN/FPS-41 AN/FPS-49 AN/FPS-50 AN/FPS-64 AN/FPS-65 AN/FPS-66 AN/FPS-67 AN/FPS-82 AN/FPS-85 AN/FPS-87 AN/FPS-90 AN/FPS-91 AN/FPS-92 AN/FPS-93 AN/FPS-95 AN/FPS-100 AN/FPS-107 AN/FPS-108 AN/FPS-113 AN/FPS-115 AN/FPS-116 AN/FPS-117 AN/FPS-120 AN/FPS-123 AN/FPS-124 AN/FPS-126 AN/FPS-129 AN/FPS-132

US Air Force Ground-based search radars

AN/FPS-3