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AN/SPN-8

Description of the radar set, tactical-technical characteristics

Figure 1: AN/SPN-8 on USS Lexington (CV-16) in 1962

Figure 1: AN/SPN-8 on USS Lexington (CV-16) in 1962

Specifications
frequency: 9 000 … 9 180 MHz
(X-Band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 4000 Hz
pulsewidth (τ): 0.25 µs
receive time:
dead time:
peak power: 40 … 60 kW
average power:
instrumented range: 6 NM (≙ 11 km)
range resolution:
accuracy:
beamwidth: 1.5°
hits per scan:
antenna rotation:
MTBCF:
MTTR:

AN/SPN-8

AN/SPN-8 was an operating in X-Band shipboard carrier controlled approach system designed to guide aircraft from a position as far as 6 nautical miles out to a position as close as 200 feet from touchdown on the aircraft carrier.

The antenna of type AS-477/SPN-8 was a truncated paraboloid fed by a feed horn. It was covered by a cylindrical radome and swiveled back and forth in a sector of 100 degrees in azimuth with 3 oscillations per second.

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