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Description of the radar set, tactical-technical characteristics

Figure 1: AN/TPS-10 at Keesler Air Force Base in 1950

frequency: 9 230 to 9 404 MHz
pulse repetition time (PRT):
pulse repetition frequency (PRF): 539 Hz
pulsewidth (τ): 0.5 and 2 µsec
receiving time:
dead time:
peak power: 250 kW
average power:
instrumented range: 60/120 NM (≙ 110/220 km)
range resolution:
hits per scan:
antenna rotation:


AN/TPS-10 was an X-band nodding height-finding radar. The transmitter/receiver electronic was essentially a stripped down version of the AN/CPS-6B. The transmitter used a magnetron of type 6002/QK221. The display was an RHI-scope with a cathode-ray tube of 12" diameter.

MIT’s Radiation Laboratory developed and produced the first version of this radar near the end of World War II. Zenith produced the A-model sets in the post-war period. The vertically mounted antenna was three feet wide and ten feet long. Two operators were needed to run the set. The initial model operated at a frequency of 9 000 to 9 160 MHz and had a maximum reliable range for bombers of 60 miles at 10 000 feet.

AN/FPS-4 and AN/MPS-8

An updated version designated the AN/FPS-4 was produced by the Radio Corporation of America (RCA) beginning in 1948. Some 450 copies of this and the trailer-mounted AN/MPS-8 version were built between 1948 and 1955.