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AN/FPS-56

Description of the radar set, tactical-technical characteristics

Figure 1: AN/FPS-56 used the same antenna as the AN/FPS-31, but with a modified horn radiator.

Figure 1: AN/FPS-56 used the same antenna as the AN/FPS-31, but with a modified horn radiator.

Specifications
frequency: L-Band
pulse repetition time (PRT):
pulse repetition frequency (PRF): 200 … 400 Hz
pulsewidth (τ):
receive time:
dead time:
peak power:
average power:
instrumented range: 200 NM (≙ 370 km)
range resolution:
accuracy:
beamwidth:
hits per scan:
antenna rotation:
MTBCF:
MTTR:

AN/FPS-56

AN/FPS-56 is operating in the L-Band target acquisition radar for air defense. It was developed for use with Nike Hercules units.

The radar consisted of a basic AN/FPS-36 radar which was equipped with a second transmitter and a second receiver that operate on different frequencies on a common antenna. The reflector of the antenna had dimensions of 40 × 11 feet (12 × 3.3 m). A modification with additional ECCM circuits led to the designation AN/FPS-61. This radar was then fitted with coupling equipment for the Nike Hercules system and named AN/FPS-69.

All Versions were fitted with a secondary radar of type AN/TPX-26. The interrogator set performs the ground station functions of an identification friend or foe (IFF) system.