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64N6 / 91N6E - TOMBSTONE / Big Bird

The 64N6E Big Bird is a Phased Array Aquisition Radar used for Aerial Targets and Ballistic Missile. The overall performance of this mobile system is claimed to equal or better the US-Navy Aegis Radar. In this configuration it has no equivalent in the West. It is an important part of the sucess of the S-300 SAM Systems (SA-10 Grumble / SA-20 Gargoyle). The MAZ 74106 Semi Tractor is a part of the famous MAZ 543 family of heavy 8 x 8 trucks. It has a shortened wheelbase between 3 + 4 axle and an APU Unit for the Big Bird Radar.

New Russian 91N6E radar is next evolution of the oldest 64N6E Big Bird / Tombstone surveillance radar and developed for SA-21 'Growler' (S-400 'Triumph' in Russian designation) SAM system. The 91N6E is fully digital 3-D radar, which has range 600km and can display up to 300 targets simultaneously. The radar is placed in two vans, towed by MZKT-7930 tractor. This is high mobile radar, its deployment time 5 minutes only. Crew consist of 4 men.

The 64N6 (NATO codename 'Tombstone') 3-D long-range surveillance radar comprises a hydraulically raised antenna assembly and radar shelter mounted on a common semi-trailer. The phased-array antenna set has a double-sided antenna aperture. Its 3-D performance is obtained by rotation of the antenna once every 12 seconds and electronically scanning the antenna beam, in both azimuth and elevation. Scan sector capability for detecting tactical ballistic missiles is also provided. This can detect aircraft and cruise missile type targets at a range of up to 300 km and ballistic missiles with launching ranges of up to 1,000 km using the sector scan facility. An IFF transponder subsystem is fitted. The radar is used for target detection and tracking in normal, clutter and severe ECM environments. The data obtained are relayed to the command post for processing and assessment. The radar can detect targets with speeds of up to 2,788 m/s (10,000 km/h). The export designation of the system is 83M6E. The S-300PMU-2 system designation is 83M6E2.

The Air Defense 64N6 (NATO code designation of Big Bird or Tombstone) is a mobile radar detection station with bilateral antenna, automatic control of modes and data, working in a centimetric range of frequencies. It is intended for maintenance with 54N6 radar-tracking information system and 83N6 control facilities for the S-300PM.

The 64N6 provides detection of the air targets with resolution, accuracy of definition of coordinates and rate of updating of the data, allowing tracking of targets, follow the trajectory without difficulty, and overcome active and passive countermeasures, definition of the state accessory(belonging) of the found out purposes, and also directions of active countermeasures.

Electronic scanning by a beam of illuminators in azimuthal and elevation planes in a combination to fast switching the sides of radiation of illuminators and uniform electromechanical rotation of illuminators on an azimuth allows redistribution of radiated energy in separate directions and sectors of a zone of the review due to temporary expenses for the review of various sites of space depending on radar-tracking conditions, to divide(undresse) visibility range into a zone of the regular review and a zone of support, to optimize time allocation for air defense due to use of procedures of detection in a combination with a mode of selection of the moving target. Borders of action are established for height and range by operators or automatically.

Protection against active countermeasures is provided with automatic reorganization of carrying frequency by results of the analysis of tracking conditions. For protection against the active countermeasures operating on lateral petals of the diagram of an orientation of antennae, the three-channel self-balancing potentiometer connected to compensatory aerials is used.

Protection against passive countermeasures is made due to use of equipment SDTS. Temporary automatic adjustment of amplification is applied to reduce the quantity of false tracks in a near zone (up to 65 km) in the channel of detection, in a distant zone - the scheme of stabilization of a level of false alarms. To reduce the quantity of false returns from subjects on district and the inactive purposes it is applied intersurvey the signals received from same sites of space during several periods of the review.

Management of air defense work and devices entering into it, processing of the radar-tracking information and definition of coordinates of the purposes is carried out by a computer constructed on the basis of two specialized computers. The built in monitoring system checks functioning the equipment and defines malfunctions.

The structure of the command post includes means of speech communication, and also the broadband communication line 5?312 for transfer of the information on a radio channel or on a cable. It is completed by means of independent electrosupply into which structure enters the unit producing the electric power of a three-phase alternating current by frequency of 400 Hz by a voltage of 220 Volts given means of external power supplies can be used the converting device and diesel power station.

Equipment is placed in two containers F6 (the illuminators, transmitting and reception devices and devices for processings of information and management), installed on the lorry convoy tractor MAZ-74106. The system is served by fighting calculation from 4 person. Its weight is 60 tons.


The S-400 Triumph is one of the world's longest range air defense systems, with no direct rival from the West. In order to create outstanding combat performance for the S-400 radar, target search is a very important component. To identify the target for this state-of-the-art air defense system, the NIIIP manufacturer has launched the 91N6E radar with superior features.

Basically, the 91N6E is an upgraded variant of the 64N6E radar with the same antenna design. Radar 91N6E can detect up to 300 targets at distances up to 600 km. The 91N6E's radar features a fully digital technology processor that is capable of scanning azimuthal and azimuthal radii, providing the ability to detect objects flying at a certain rate. Highly corrosive environment.

The 91N6E operates on the S-band, catching up to 300 aerial targets, especially ballistic missiles up to 600 km. Two oblique array antennas consist of 2.700 transceivers that continuously produce secondary lobes that provide high resistance to noise, while increasing the accuracy and number of detectable targets. Information collected from the 91N6E radar will be transferred to the 55K6E self-propelled command vehicle to decide on the most dangerous target. This information is then transmitted to the 92n6E fire control radar.

Compared with the 64N6E radar, the 91N6E radar has a number of remarkable features such as greater number of targets for detection, longer range of scans. In addition to eliminating air targets, the manufacturer focused on the anti-ballistic missile (anti-ballistic missile) feature for 91N6E radar. In addition, the low catch and fast moving objects, moving at speeds up to 17,000 km/h is also significantly improved.

The highlight of the 91N6E radar is the good grip with the ballistic missile target flying at very high speeds. The presence of the 91N6E radar allows the S-400 Triumph air defense to intercept ballistic missiles at a distance of 60 km. The 91N6E can provide 40N6 missiles for 400 km, or 48N6E2 / 48N6E3 missiles with a range of 200 km / 250 km. The S-400 Triumph also uses 9M96 or 9M96E missiles to destroy low-level targets. The entire antenna, control room of the 91N6E radar, mounted on the high-end MZKT-7930 chassis . The deployment time - only about 5 minutes, which is inherited from the 64N6E radar as well as the other components of the S-300PMU1/2.

64N6 / 91N6E - TOMBSTONE / Big Bird 64N6 / 91N6E - TOMBSTONE / Big Bird 64N6 / 91N6E - TOMBSTONE / Big Bird 64N6 / 91N6E - TOMBSTONE / Big Bird

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Page last modified: 23-04-2018 12:43:19 ZULU