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55Zh6U “NEBO-U”

Description of the radar set, tactical-technical characteristics Описание; Основные тактико-технические характеристики (Базы данных)

Figure 1: 55Zh6U “NEBO-U”

Figure 1: 55Zh6U “NEBO-U”

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 analogue/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.