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S 654

Description of the radar set, tactical-technical characteristics

Figure 1: S 654

Figure 1: S 654

Specifications
frequency: 1 295 … 1 365 MHz
(L-Band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 590 or 350 Hz
pulsewidth (τ): 2.5 or 4 µs
receive time:
dead time:
peak power: 0.8 or 2.3 MW
average power:
instrumented range: 100 or 180 NM
(≙ 185 or 333 km)
range resolution:
accuracy:
beamwidth: 1.7°
hits per scan:
antenna rotation: 7.5 or 15 rpm
MTBCF:
MTTR:

S 654

S 654 was operating in L-Band air surveillance radar usable for air traffic management. It could be used both as an en-route radar and, with reduced transmit power, as a terminal area radar.

The antenna used two antenna patterns staggered in elevation angle (high and low beam) for more effective fixed target suppression. The high-powered transmitter of type SR-1030 uses a water-cooled magnetron. Radar signal processing already provided a synthetic representation of the air situation on the displays.

The radar was built in the early 1960s.