OVERVIEW: The AN/FPS-20 is a fixed early warning and ground-controlled interception radar system operating in the D Band

DETAILS: The FPS-20's were simple pulse-radar systems and subject to jamming using basic techniques.

Specifications:

Frequency: 1250 to 1350 MHz (D Band)
Power output: 6 KW (average); 2.5 MW (peak)
PRF: 350 Hz
Range Resolution: 1.85 km (range), 1 degree (azimuth)
On/Off time: unknown
Deploy/Stow Time N/A
Max Range: 322 km





NOTES: IOC 1956. The radar family started with the AN/FPS-3 in 1950. By the late 1950s, this radar dominated the US radar defense network, with deployment continuing into the early 1960s. Later updates largely improved ECCM capabilities and were designated AN/FPS-64, AN/FPS-65, AN/FPS-66, AN/FPS-67, AN/FPS-91, AN/FPS-93, AN/FPS-100, AN/FPS-113, AN/GPS-4, and AN/FPS-508.

SOURCES: Wikipedia, the Free Encyclopedia. Accessed March 21, 2015. http://en.wikipedia.org/wiki/Bendix_AN/FPS-20 ; http://fas.org/nuke/guide/usa/airdef/an-fps-20.htm ; Bendix Corp, "AN/FPS-20Q Radar, Oceana NAS," http://www.radomes.org/museum/documents/NAS%20Oceana%20%20AN-FPS20%20Description.pdf ; http://www.radartutorial.eu/19.kartei/karte814.en.html