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P-40 “Long Track”

Description of the radar set, tactical-technical characteristics

Figure 1: “Long Track”
(This photo was shot by kind permission in the armed forces historical museum in Dresden.)

frequency: 2.2 to 2.3 GHz
pulse repetition time (PRT): 2.5 or 1.25 ms
pulse repetition frequency (PRF): 400 or 800 pps
pulsewidth (τ): 2 × 2 microseconds
receiving time: 2.49 or 1.24 ms
dead time: none
peak power: up to 2 MW
average power: 2 … 3 kW
instrumented range: 200 NM
range resolution: 900 ft
beamwidth: 1.5°
hits per scan: > 8
antenna rotation: 4 or 5

P-40 “Long Track”

The P-40 “Long Track” (Russ. Designator: 1S12 “Bronja” - the armor, cyrillic 1С12 «Броня») is a mobile radar station on the base vehicle 426 U with a range of about 300 km. The crew consisted of 6 men. It was used for target assignment for units of NVA troop air defense.

A diesel engine with 12 cylinders was used with a performance of 342 kW (465 hp). The radar station reached a maximum speed of 55 km/h despite an equipment weight of 35 t.

The electronic components of the receive path dates predominantly from the P 37.

The radar was powered by a built-in 400 Hz generator driven by a gas turbine.

Picture gallery of the P-40

Figure 2: P-40 “Long Track” scopes