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SON-4

Description of the radar set, tactical-technical characteristics

Figure 1: SON-4

Figure 1: SON-4

Specifications
frequency: 2 700 … 2 860 MHz
(S band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 1 249 Hz
pulsewidth (τ): 0,8 µs
receiving time:
dead time:
peak power: 250 kW
average power:
instrumented range: 60 km
range resolution: 125 m
accuracy: 20 m
beamwidth: 3,5 … 4,6°
hits per scan:
antenna rotation:
MTBCF:
MTTR:

SON-4

SON-4 “Lutch” (abbreviated from Stantsiya Orudiynoy Navodki - Gun Direction Station, Cyrillic: Станция Орудийной Наводки, СОН-4 "Луч") was a target tracking radar operating in S band for fire control of 57 to 100 mm caliber anti-aircraft guns. The parabolic antenna had a diameter of 1.83 m. It used a dipole rotating at 25 revolutions per second as the primary radiator and tracked targets using conical scan. The relatively large frequency range was achieved with four different magnetron types, each tunable in the range of 40 MHz bandwidth. For a target search, the P-8 ”Knife Rest A“ or P-10 ”Knife Rest B“ radars were used.

The radar was developed in 1948 and was in the armament of the Soviet Army until about 1955. The design based on the SCR-584, whose plans were provided to the USSR during World War II. It was subsequently replaced by its own further development, the SON-9.