Description of the radar set, tactical-technical characteristics
Figure 1: HARD 3D
|frequency:||8 800 … 9 300 MHz
|pulse repetition time (PRT):|
|pulse repetition frequency (PRF):|
|peak power:||65 W|
|average power:||8 W|
|instrumented range:||20 km|
|range resolution:||50 m; 0,5°|
|hits per scan:|
|antenna rotation:||40 rpm|
HARD 3D is operating in X-Band 3D search and target acquisition radar designed for SHORAD systems. The original HARD 3D version is used exclusively by the Swedish Armed Forces under the name PS-91.
The Improved HARD 3D features alternate PRF modes combined with the ability to locate hovering helicopters. The 3D capability up to a maximum elevation angle of 35° achieves a linear phased array antenna consisting of 16 antenna groups, each driven by a novel transmitter module. These measures allow increasing the transmit power. In conjunction with adaptive MTI filtering, the higher power has enabled the range to be almost doubled compared to the basic version. The search strategy makes it possible to cover the entire elevation angle range of 35° after two rotations, despite the high rotation speed.
The Improved HARD 3D is difficult to detect. This capability is ensured by:
- a very low electromagnetic signature of low output power;
- high agility of the transmit frequencies in wide frequency bands;
- a narrow main lobe of the antenna with small side lobes.
The radar is very difficult to detect with radar warning receivers. According to the manufacturer, it is almost impossible to counter the radar with anti-radar missiles (ARMs). Low-altitude target detection and ECCM capability are the key features of the HARD 3D search and target acquisition radar.