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Description of the radar set, tactical-technical characteristics

Figure 1: AN/APS-3 radar mounted on a US Navy PV-2 Harpoon aircraft, 1946

frequency: 9 310 … 9 375 MHz
pulse repetition time (PRT):
pulse repetition frequency (PRF):
pulsewidth (τ):
receiving time:
dead time:
peak power: 25 kW
average power:
instrumented range: 18 km
range resolution:
hits per scan:
antenna rotation:


AN/APS-3 was operating in X-band air-to-surface search and bombing radar. It could also be used for navigation and for homing a radar beacon.

The antenna unit consisted of a parabolic reflector and an antenna feed through a waveguide. It was connected to a motor via a gearbox. This allowed the antenna to be slewed in a 160° sector at about 35 cycles per minute. The display was on a rectangular illuminated B-scope. Land masses were displayed as bright areas. Coastlines and rivers were shown as dark contrasts.

The radar was built between 1943 and 1946.

Picture gallery of AN/APS-3

Figure 2: Main components of AN/APS-3

Figure 3: The radar is located in the pod on the wing