Bars radar
The Bars are a family of Russian (former USSR) all-weather multimode airborne radar
Radar is an object-detection system which uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. The radar dish or antenna transmits pulses of radio...

s developed by the Tikhomirov Scientific Research Institute of Instrument Design
Tikhomirov Scientific Research Institute of Instrument Design
JSC V.V. Tikhomirov Scientific Research Institute of Instrument Design is a joint stock company, one of the major Russian enterprises in the development of weaponry control systems for fighter planes and mobile medium range anti-aircraft SAM defense vehicles.The institute was created on March 1,...

 for multi-role combat aircraft such as the Su-27 and the MiG-29.


The Bars was originally an X-band Pulse-Doppler radar developed for the Su-27. In its original N011 form the radar used an electronically scanned slotted planar antenna but with the experience gained from the development of the N007 Zaslon and in an effort to improve performance the antenna design was changed to a multi-channel Passive electronically scanned array
Passive electronically scanned array
A passive electronically scanned array , contrary to its active counterpart AESA, is a phased array which has a central radiofrequency source , sending energy into phase shift modules, which then send energy into the various emitting elements in the front of the antenna...

 (PESA) resulting in the N011M Bars (Snow Leopard). The design of the N011M bars antenna like the earlier N007 antenna consists of two separate electronically controlled arrays, an X-band radar and a L-band transponder with a total weight of 100 kg and a diameter of 960 mm . The radar has a peak power output of 4-5 kW and is capable of positioning beams in 400 microseconds , a huge advantage over mechanically scanned radar. The Bars radar can be fixed in position to give a scanning sector of ±70 degrees in azimuth and ±45 degrees in elevation , the radar can also be mounted on electromechanical drives to improve scan coverage. The N011M supports digital signal processing using 3 processors with 16 MB of both static and flash memory .

N011M has a search range of 350 km and a tracking range of 200 km, with 60 km in the rear in the air to air mode. Up to 15 air targets can be tracked at once in track-while-scan mode with 4 of these engaged at once. The N011M can use a number of short range and speed search modes and is capable of identifying the type and number of multiple targets. The Bars radar is compatible with R-77
Vympel R-77
The Russian R-77 Missile is a medium range, air-to-air, active radar-guided missile system. It is the Russian counterpart to the American AIM-120 AMRAAM missile, thus gaining a nickname: Amraamski....

 and R-27 radar guided missiles providing both illumination and data-link guidance as well as the R-73
Vympel R-73
The Vympel R-73 developed by Vympel machine-building design bureau, is the most modern Russian short-range air-to-air missile.-Development:...

 IR guided missile .

In the air to surface mode the radar is capable of detecting ground and naval based moving targets, determining their location and maintaining a track on two surface targets at once . The N011 is capable of detecting a tank sized target to a range maximum range of 50 km and a destroyer sized target to a range of 150 km . Bars also features a mapping mode using either real beam, doppler beam sharpening or Synthetic aperture radar
Synthetic aperture radar
Synthetic-aperture radar is a form of radar whose defining characteristic is its use of relative motion between an antenna and its target region to provide distinctive long-term coherent-signal variations that are exploited to obtain finer spatial resolution than is possible with conventional...

 with a maximum resolution of 10 meters . The Kh-31
The Kh-31 is a Russian air-to-surface missile carried by aircraft such as the MiG-29 or Su-27. It is a sea skimming cruise missile with a range of or more and capable of Mach 3.5, the first supersonic anti-ship missile that could be launched by tactical aircraft.There are several variants, it is...

anti-radiation missile is also compatible with the radar .


The Tikhomirov Scientific Research Institute of Instrument Design has displayed a modified N011M radar for the MiG-29 designated the Bars-29. The Bars-29 shares up to 90% of its software and hardware with the original Bars radar while being small enough to be installed within the nose of the MiG-29 fighter . The Bars-29 has a detection range of 120 km against a target with an RCS of 5 m2, 15 targets can be tracked at once when using track-while-scan mode, with 4 engaged at any one time . The radar has a peak power output of 1 kW.

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