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55G6 Nebo / Sky / TALL RACK

Designed for detection, identification, measurement of three coordinates and tracking of air targets, including airplanes manufactured using stealth technology. It is used in the air defense forces as part of the ACS or autonomously.

55G6 "Sky" is a three-coordinate radar meter range. By the decree of the USSR Council of Ministers at the beginning of 1975, the “Sky” R & D was set up to develop two standardized three-dimensional radar meters of wave range for the country's air defense forces in transportable design (Sky 55ZH6 radar “Sky”) and for mobile air defense forces (1L13 ” Sky-SV "). In the same year of 1975 another Resolution of the USSR Council of Ministers was issued, in which the OCD "Sky" was included in the list of the most important works of the five-year plan. Along with OCD, the Angle research and development project was set up to study the possibility of creating a three-dimensional radar station in the meter range.

Development of the radar 55ZH6 within the framework of the OCD "Sky" was conducted by Gorky Scientific-Research Institute of Radio Engineering (Gorky, now Nizhny Novgorod, since 1991 - NIIRT), chief designer - Alexander Zachepitsky. State tests of RLS 55ZH6 were started at the Kapustin Yar test site in 1982. The complex of the radar 55ZH6 was put into service in 1982. The NIIRT team was awarded the USSR State Prize for the development of the radar station in 1987. The radar 55ZH6 "Nebo" was produced by the Gorky Television Factory (Nitel JSC, Nizhny Novgorod).

The radar is designed for detecting, identifying, measuring three coordinates and tracking air targets, including stealth-made aircraft. It is used in the air defense forces as part of the ACS or autonomously.

Radar operates in the meter wavelength range and combines the functions of the rangefinder and altimeter. In this range, the radio waves of the radar are not very vulnerable to homing projectiles and anti-radar missiles operating in other bands, and in the working range these weapons are currently absent. In the vertical plane, an electron scanning by an altimeter beam in each element of the resolution in range is realized (without using phase shifters). Immunity in the presence of active interference is provided by an adaptive tuning of the operating frequency and a multi-channel auto-compensation system. The system of protection against passive interference is also based on correlation auto-compensators.

The radar of the circular coverage "Sky" is located on eight transport units (on three semi-trailers - an antenna-mast device, on two - equipment, on three trailers - an autonomous power supply system). There is a portable device transported in crates. The radar operates in the meter wave band and combines the functions of the rangefinder and altimeter. In this range, the radio waves of the radar are not highly vulnerable to homing projectiles and anti-radar missiles operating in other ranges, while in the working range these weapons are currently missing. In the vertical plane, an electron scanning by an altimeter beam in each element of the resolution in range is realized (without using phase shifters).

Immunity in the presence of active interference is provided by an adaptive tuning of the operating frequency and a multi-channel auto-compensation system. The system of protection against passive interference is also based on correlation auto-compensators. For the first time, to ensure noise immunity under the influence of combined interference, the space-time decoupling of active and passive interference protection systems has been implemented.

Measurement and issuance of coordinates are carried out with the help of the equipment of the autosampling based on the built-in special calculator. There is an automated system for monitoring and diagnosing. The transmitting device is distinguished by high reliability, which is achieved by 100% redundant power amplifier and the use of solid-state group modulator. Radar "Sky" can be operated at an ambient temperature of ± 50 ° C, wind speeds up to 35 m / s.

Wave rangemeter
number of transport units
  • 7-8 semi-trailers (on three semi-trailers
  • antenna mast device, on two
  • equipment, on three trailers
  • autonomous power supply system)
  • a portable device transported to tare boxes.
  • Antenna dimensions 16 x 3.24 m
    Limits of work:
    in range, km600 km / 1200
    by height, km75 km
    azimuth, hail360 degrees
    Accuracy of measurement of coordinates
    in range, m400/500 m (according to various sources)
    in azimuth, min.24
    by height, m750/850 m (according to different data)
    measurement zone of the three coordinates of the target type "fighter" by distance (at height):
  • 65 km (300 m)
  • 300 km (10,000 m)
  • more than 400 km (20,000 m)
  • on height - 60 km
  • Working conditions
    ambient air temperature from -50 to +50 degrees C
    wind speed up to 35 m / s
    amount of information issued to the automated control system at least 300 coordinate points.
    period of a full revolution of 360 degrees (the rate of updating information) 10 s.
    Coefficient of sub-interference visibility of the SDT system, dB45
    Type of outputcoordinate points
    number of coordinate pointsnot less than 300
    Data update rate, sten
    Mean time between failures, h150
    Power consumption, kW100 kW
    Service staff, pers.4 (one shift)
    deployment time, h22 hours
    Modifications:
  • 55ZH6M "Nebo-M" - meter module RLM-M
  • 55ZH6M-M "Nebo-MM" - upgraded meter module RLM-M, development of "Nebo-M"
  • 55ZH6ME "Nebo-ME" - UHF Radar RLM-D
  • 55ZH6-U "Sky-U" - three-dimensional, meter-wave range, transported
  • 55ZH6-UE "Sky-UE" - three-dimensional, meter-wave range transported - export version
  • 55ZH6-UM "Niobium" - modernization of the three-coordinate radar of the standby mode "Nebo-U" and "Nebo-SVU" with AFAR of meter and decimeter ranges with transfer to the new element base
  • 1L13 "Sky-SV" - a mobile two-coordinate radar of circular viewing meter range
  • 1L119 "Sky-SVU" - a mobile three-coordinate radar of the round range meter range, the development of "Sky-SV"


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    Page last modified: 28-07-2019 18:55:50 ZULU