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9S18M

Description of the radar set, tactical-technical characteristics

Figure 1: 9S18M

Figure 1: 9S18M

Specifications
frequency: H/I-Band
pulse repetition time (PRT):
pulse repetition frequency (PRF):
pulsewidth (τ):
receive time:
dead time:
peak power:
average power: 2.5 … 4.5 kW
instrumented range: 160 km
range resolution: 400 m
accuracy: 130 m; 0.3°
beamwidth: 3 … 4,5°
hits per scan:
antenna rotation: 3 … 14 rpm
MTBCF:
MTTR:

9S18M

The 9S18M “Kupol-M” (Cyrillic: «Купол-М»; NATO designation: “Snow Drift”) is a mobile 3-D acquisition radar operating frequency agile in the H/I-Band. The radar uses a rectangular phased-array antenna of slotted waveguides with mechanical rotation in azimuth and an electronically steered pencil beam in elevation. The transmitters' waveform is alternate an unmodulated pulse and a pulse with linear intra-pulse frequency modulation (chirp). The radar can track up to 50 targets at a time, and provide target designation on six targets. It is used for target assignment for the 9K37 “Buk” air defense missile system (Cyrillic: «Бук М1»; NATO designation: SA-11 “Gadfly”).

The radar was developed in 1977 and has been in the armament of some states of the former Soviet Union and Finland since 1980.