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N-21, N-22

Description of the radar set, tactical-technical characteristics

Figure 1: N-22

Figure 1: N-22

Specifications
frequency: S-Band
pulse repetition time (PRT):
pulse repetition frequency (PRF): 1 000 Hz
pulsewidth (τ): 10 µs
receive time:
dead time:
peak power: 90 kW
average power:
instrumented range: 100 km
range resolution:
accuracy: 100 m; 0.2°
beamwidth:
hits per scan:
antenna rotation: 12 or 24 rpm
MTBCF:
MTTR:

N-21, N-22

The N-22 is an operating in S-Band self propelled short to midrange 2D- air surveillance radar for tactical use. It can also used as a gap filler up to an altitude of 7 000 m. The parabolic reflector of the antenna has the dimension of 4,2 × 3,1 m. It provides a cosecant squared pattern. The predesessor of the N-22 was the N-21, using the same antenna. The N-21 used as transmitter power amplifier an amplitron, that was driven by a travelling wave tube of the type LO-301M. The N-22 radar is used to provide target information to low-level air defence systems such as the Russian 9K33 Osa (NATO SA-8 “Gecko”) self-propelled surface-to-air missile system. Prime contractor for the N-22 is the RADWAR company of Poland (now PITRADWAR). The radar is mounted on a modified Tatra 815 8×8 chassis and has a fully enclosed armoured cab in the centre and an elevatable mast at the rear.

The N-21 was produced since the late 1980s and the N-22 was produced since the mid-1990s.

Picture gallery of N-21, N-22

Figure 2: N-21MI Radar using SPG-1, non armored carrier vehicle.