1RL144
Description of the radar set, tactical-technical characteristics
Figure 1: 1RL144
| Specifications | ||
|---|---|---|
| Hot Shot | A | B |
| frequency: | S band | X-band |
| pulse repetition time (PRT): | ||
| pulse repetition frequency (PRF): | ||
| pulsewidth (τ): | ||
| receiving time: | ||
| dead time: | ||
| peak power: | 10 kW | 150 kW |
| average power: | ||
| instrumented range: | 20 km | 18 km |
| range resolution: | ||
| accuracy: | 20 m; 1° | 2 m; 2 min |
| beamwidth: | ||
| hits per scan: | ||
| antenna rotation: | ||
| MTBCF: | ||
| MTTR: | ||
1RL144
The 1RL144 (NATO designation: “Hot Shot A”) is a 3D surveillance and target acquisition radar of the hybrid (combined anti-aircraft missile and gun) air defense system 2S6M “Tunguska” operating in S band.
The radar’s single-curved parabolic antenna is mounted to the rear of the turret. A 1RL138 secondary radar operating in the UHF band is integrated. The rotation of the antenna is electromechanically position-stabilized and can also be used while the vehicle is in motion. It generates multiple antenna patterns approximately 5° wide in elevation angle up to an elevation angle of 15°. The radar feeds its data into a central computer, designated 1A26, for weapon control.
The air defense system is equipped with an additional multifunction radar operating in the X-band for target tracking, which is mounted between the gun barrels (NATO designation: “Hot Shot B”). This radar operates as a target-tracking radar using the monopulse method to control the anti-aircraft guns. It uses a circular parabolic antenna and transmits pulse-position modulated codes to guide the missiles. When the missile is only about 1 000 m from the target, it operates as a target-illuminating radar NDZ (Russian designation: радиолокационный неконтактный датчик цели, НДЦ) for the radio igniter in the missile. The radar then operates as a bistatic radar for semi-active target tracking.