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Description of the radar set, tactical-technical characteristics

Figure 1: ASR 5

Figure 1: ASR 5 on airport in Miramar (California, USA) in 1972

frequency: 2 700 … 2 900 MHz
(S band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 710 … 1 200 Hz
pulsewidth (τ): 0.833 µs
receiving time:
dead time:
peak power: 425 kW
average power: 380 W
instrumented range: 60 NM (≙ 111 km)
range resolution: 187 m
accuracy: ± 2%
beamwidth: 1.5°
hits per scan:
antenna rotation: 15 rpm


ASR 5 was a pulse-modulated S band terminal area surveillance radar. The radar utilized a 5.18 m diameter parabolic reflector type antenna with an antenna gain of 34 dB. It generated a fan-shaped beam from minus 3 to plus 30 degrees in elevation. The polarization was switcheable between linear vertical and circular.

In 1973 the ASR-5 antenna was modified by adding a separate receive only feedhorn and polarizer to produce separate antenna two-way coverage patterns for the close-in and long-range capabilities.

The ASR 5 was widely used at cilvil airports in the seventies and eighties. At the beginning of the 90s it was replaced by the ASR-9.

The military designator of the ASR 5 was AN/FPN-47. The transmitter and receiver site equipments of both radars are identical; however, they used different indicator groups. AN/FPN-47 is used with indicator group OA-4754/FPN-47 and ASR-5 is used with indicator groups of AN/CPN-18.