 Westinghouse AN/FPS-27 Radar | |
| Country of origin | United States |
|---|---|
| Introduced | 1963 (1963) |
| Type | Surveillance and Height Finding |
| Frequency | 2322 to 2670 MHz |
| PRF | selectable between 226 and 288 |
| Pulsewidth | 6.5 micro seconds |
| RPM | 5 RPM |
| Range | 220 nmi (410 km; 250 mi) |
| Altitude | 150,000 ft (46,000 m) |
| Power | 15,000,000 Watts peak; 30,000 Watts average |
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TheAN/FPS-27 Radar was a long-rangeearly warning radar used by theUnited States Air ForceAir Defense Command.
Westinghouse Electric Corporation built a frequency diverse (FD) search radar designed to operate in the S-band from 2322 to 2670 MHz. The radar was designed to have a maximum range of 220 nmi (410 km; 250 mi) and search to an altitude of 150,000 ft (46,000 m).
System problems required several modifications at the test platform located atCrystal Springs, Mississippi. Once these problems were solved, the first of twenty units in the continental United States became operational atCharleston, Maine, in 1963. The last unit was installed atBellefontaine, Ohio, a year later. All AN/FPS-27 radars were installed at sites which hadAN/FPS-6,AN/FPS-26, orAN/FPS-90 height finder radars. The 3-D functionality of the AN/FPS-27 was not available to theAN/FYQ-47 Common Digitizer for use in theSemi-Automatic Ground Environment (SAGE) system.
The 3-D functionality was possible through the use of a "vertically stacked beam" radiating feedhorn into the parabolic reflector. The received radar return was detected in a single or adjacent feedhorn which the radar receiver calculated a relative position in elevation.
In the early 1970s, AN/FPS-27 radar stations that had not been shut down received a modification (solid state receiver circuitry replacing vacuum tubes) that improved reliability and saved on maintenance costs. The upgraded radars were designated AN/FPS-27A.
In accordance with theJoint Electronics Type Designation System (JETDS), the "AN/FPS-27" designation represents the 27th design of an Army-Navy electronic device for fixed ground search radar.[1][2] The JETDS system also now is used to name allDepartment of Defense electronic systems.
This article incorporatespublic domain material from the Air Force Historical Research Agency
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