Description of the radar set, tactical-technical characteristics
Figure 1: Antenna 64AJP of SG-3 radar
|frequency:||3 400 … 3 700 MHz
|pulse repetition time (PRT):|
|pulse repetition frequency (PRF):||750 Hz|
|pulsewidth (τ):||0.33 or 1.25 µs|
|peak power:||300 … 500 kW|
|instrumented range:||80 NM (≙ 148 km)|
|range resolution:||200 yards|
|accuracy:||±100 yards; ±0.75°|
|hits per scan:|
|antenna rotation:||2.5 or 5 min⁻¹|
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.
- Military Standardization Handbook United States Radar Equipment Manual TM 11-487C-1 1965, p. 1176ff
- Antenna Catalog Volume III, Ship Antennas, Georgia Institute of Technology, October 1960, AD323191, p. 140f