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ACR 430

Description of the radar set, tactical-technical characteristics

Figure 1: ACR430 in Bournemouth (England), © 1980 John Faulkner

Figure 1: ACR430 in Bournemouth (England), © 1980 John Faulkner

Specifications
frequency: 9 320 and 9 460 MHz
(X-Band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 2 kHz or 1 kHz
pulsewidth (τ): 0.2 or 0.5 µs
receive time:
dead time:
peak power: 2 × 55 kW
average power: 110 W
instrumented range: 32 NM (≙ 60 km)
range resolution: 100 m
accuracy: ±1%
beamwidth: 0.55°
hits per scan:
antenna rotation: 20 or 40 rpm
MTBCF:
MTTR:

ACR 430

ACR430 (Abbr. of Airfield Control Radar) was an X-Band airfield control radar. It was designed between the 1950s and the mid 1960s as a replacement for the older Type 424 radar to meet the requirements of air surveillance control. The ACR430 radar employs a two-beam aerial system (high Fan-beam und low Pencil beam), two transmitters and receivers and two operational displays. It used fixed circular polarization to reduce the effects of rain clutter. Unfortunately, the very large attenuations in the X-band still remain due to absorption by the rain zones. Therefore, the X-band proved not to be very useful for terminal area radar applications.

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