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AN/CPS-4 Radar
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| Type | Medium-Range Height Finding |
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| Frequency | 2700 to 2900 MHz |
The AN/CPS-4 Radar was a Medium-Height Finding Radar used by the United States Air Force Air Defense Command.
Developed by MIT's Radiation Laboratory, this height-finding radar was nicknamed "Beaver Tail." The radar was designed to be used in conjunction with the SCR-270 and SCR-271 search sets. The CPS-4 required six operators. This S-band radar, operating in the 2700 to 2900 MHz range, could detect targets at a distance of ninety miles. The vertical antenna was twenty feet high and five feet wide. This radar was often paired with the AN/FPS-3 search radar during the early 1950s at permanent network radar sites.
This article incorporates public domain material from websites or documents of the Air Force Historical Research Agency.