55Zh6U “NEBO-U”
Description of the radar set, tactical-technical characteristics
Figure 1: 55Zh6U “NEBO-U”
Нижегородский
| Specifications | |
|---|---|
| frequency: | VHF-Band |
| pulse repetition time (PRT): | |
| pulse repetition frequency (PRF): | |
| pulsewidth (τ): | |
| receive time: | |
| dead time: | |
| peak power: | 500 kW |
| average power: | 5 kW |
| instrumented range: | 700 km |
| range resolution: | |
| accuracy: | 500 m ; 0.4° |
| beamwidth: | |
| hits per scan: | |
| antenna rotation: | 6 rpm |
| MTBCF: | > 250 h |
| MTTR: | |
55Zh6U “NEBO-U”
55Zh6U “NEBO-U” (kyr.: 55Ж6У «Небо-У», NATO-Designator: “Tall Rack”) is an VHF-Band transportable 3-D surveillance radar that is designed to provide long-range detection of air targets operating at a wide range of speeds and altitudes. Nebo is further decribed as being able to perform its mission autonomously or feed its analog/digital data output to air defence centres. The system's transmission coding and signal processing techniques are optimised for a countermeasures polluted enviroment and its manufacturer claims that it is effective against low-observatibbility targets (“Stealth”).
55Zh6U uses a phased-array antenna. The echo signals of the pairwise combined rows of the altimeter antenna (12 channels in total) are digitized after conversion to the intermediate frequency and all space-time processing algorithms including electronic beam scanning, interference protection, compression, accumulation, measurement are implemented as a software product in the radar signal processor.