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P-90 “Pamir”

Description of the radar set, tactical-technical characteristics

Figure 1: P-90

Figure 1: P-90

Specifications
frequency: S-Band
pulse repetition time (PRT):
pulse repetition frequency (PRF):
pulsewidth (τ):
receive time:
dead time:
peak power: 2.7 … 3 MW
average power:
instrumented range: 360 km
range resolution:
accuracy:
beamwidth:
hits per scan:
antenna rotation: 2.5 … 5 min⁻¹
MTBCF:
MTTR:

P-90 “Pamir”

P-90 “Pamir”, (Russian designator: 1RL115, Cyrillic: 1РЛ115 / П-90 «Памир») is a stationary, long-range, jamming-resistant 3D early warning radar operating in the S-Band that extends to cosmic altitude (50 km).

The radar uses separate antennas for transmitting and receiving. The entire antenna construction weighs 120 tons. The topmost antennas are the transmitting antennas, providing a cosecant squared characteristic. This antenna pair had the dimensions of 13 × 5 m, later 13 × 7 m. Each transmitting antenna is fed by two transmitters, each equipped with a klystron. Four quartz stabilized transmit frequencies are radiated simultaneously.

The receiving antennas are torus antennas with the dimensions 18 × 15 m. They each contain 21 narrow reception diagrams, which are processed in a total of 42 independent reception channels.

This radar type was in operation from 1961 to the end of the 1970s.


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