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SG-3, SG-4

Description of the radar set, tactical-technical characteristics

Figure 1: Antenna 64AJP of SG-3 radar

Figure 1: Antenna 64AJP of SG-3 radar

Specifications
frequency: 3 400 … 3 700 MHz
(S-Band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 750 Hz
pulsewidth (τ): 0.33 or 1.25 µs
receive time:
dead time:
peak power: 300 … 500 kW
average power:
instrumented range: 80 NM (≙ 148 km)
range resolution: 200 yards
accuracy: ±100 yards; ±0.75°
beamwidth:
hits per scan:
antenna rotation: 2.5 or 5 min⁻¹
MTBCF:
MTTR:

SG-3, SG-4

SG-3 and SG-4 were operating in S-Band naval surface scanning radars, differing only in the antenna used (SG-4 antenna is stabilized; SG-3 antenna is not).

The antenna of SG-3 consists of an offset paraboloidal section of slat-type construction with a waveguide and horn feed with horizontal polarization. The reflector is 1½ feet high and 7 feet wide. The antenna is tiltable through 10 degrees in elevation. The vertical half-power beamwidth of SG-3 antenna is 13 degrees, SG-4 antenna 6.5 degrees of.

Sources: