Bars radar The Bars is a family of Russian ( former USSR ) all - weather multimode airborne radar s developed by the Tikhomirov Scientific Research Institute of Instrument Design for multi - role combat aircraft such as the Su - 27 and the MiG - 29 . N011 . The first member of Bars series radar was N011 , which was originally an X - band Pulse - Doppler radar developed for the Su - 27 . In this original N011 form , it deploys an mechanically scanned planar array with 960 mm diameter , ±85 degrees scan sector . The peak output power is 8 kW with an average of 2 kW . N011 features a low noise UHF input amplifier , and fully digitized signal processing unit using reprogrammable digital computers . The original requirement of simultaneously tracking 20 targets and engaging 8 of the 20 tracked proved impossible to achieve at the time due to Soviet technological bottleneck , but N011 is able to simultaneously track 13 target and engaging 4 of 13 . This is subsequently upgraded to tracking 15 targets and engaging 6 of 15 tracked simultaneously . The maximum air - to - air detection range is over 400 km when used as an airborne early warning role , and when used for intercepting role , the range against a typical fighter sized target is 140 km against a head - on , and 65 km tail - on . For air - to - surface mode , N011 has five air - to - ground modes and four maritime modes , including ground mapping , terrain - following and terrain - avoidance modes . The maximum air - to - surface mode is over 200 km against aircraft carrier type of target . N011M . The second member of Bars radar family is N011M , a radar used an electronically scanned slotted planar antenna but with the experience gained from the development of the N007 Zaslon . In an effort to improve performance the antenna design was changed to a multi - channel passive electronically scanned array ( PESA ) . 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 IFF 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 . To improve scan coverage , the radar can also be mounted on electromechanical drives , and in this case , the scanning sector is expanded to ±90 degrees . The 28 MHz Ts200 programmable signal processor used in N011M incorporates Fourier transforms of " butterfly " type capable of 75 Million operations per second . The N011M supports digital signal processing using 3 processors with 16 MB of both static and flash memory . The peak output is 4 to 5 kW with an average output of 1 . 2 kW , and the total radar system weighs around 650 kg . N011M is used on Su - 30MKI , and the contract for the N011M radar has three stages . The initial MK1 software was tested in 2002 and supplied with the first Su - 30MKI deliveries . India was supposed to build both programmable signal processors and data processors under project " Vetrivale " to replace the original Russian components , but failed to do so within the required time frame , so MK2 still used the Russia . In 2004 , India delivered Vetrivale radar computer based in the i960 architecture . It ' s worth noting that N011M is not simply a PESA , but instead , it ' s a transition between PESA and AESA in that it adopts technologies from both : each transceiver on the antenna array of N011M has its own receiver amplifier , which is the same as AESA , and with noise level of 3 dB , which is also in the same class of AESA arrays . However , for transmitting , N011M uses PSEA technology in that a single Chelnok traveling wave tube is used for EGSP - 6A transmitter . There are three receiving channels for N011M . N011M has a search range of 400 km and a tracking range of 200 km , with 60 km in the rear in the air to air mode . Detection range fighter type MIG - 29 in area of review of over 300 sq . deg : - on towards course - up to 140 km ; - in pursuit of - up to 60 km . 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 and R - 27 radar guided missiles providing both illumination and data - link guidance as well as the R - 73 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 the group of tanks target to a maximum range of 40 – 50 km and a destroyer sized target to a range of 80 – 120 km . Bars also features a mapping mode using either real beam , doppler beam sharpening or Synthetic aperture radar with a maximum resolution of 10 meters . The Kh - 31 anti - radiation missile is also compatible with the radar . N035 . N035 Irbis - E ( Snow Leopard ) radar is the most powerful radar of Bars radar family , and it is a direct descendant of N011M , and it adopts many components of N011M to save cost and shorten the developmental time . The difference between N035 and its predecessor N011M is that the receiving channel is increased to 4 in N035 from the original 3 in N011M . A new transmitter EGSP - 27 incorporated an upgraded version of Chelnok traveling wave tube that is capable of delivering 10 kW peak power output , resulting in the peak output of N035 increased to 20 kW , with an average output peak of 5 kW and continuous wave illumination of 2 kW . A new 5010 - 35 . 01 digital processor and a new 5010 - 35 . 02 info processor are used , and N035 has twice the bandwidth of N011M . The noise level is increased to 3 . 5 dB from the 3 dB of N011M , and against typical aerial target with 3 square meters , the effective range is in excess of 400 km ( head - on ) . Against stealth target with 0 . 01 square meters , the head - on effective range is in excess of 90 km . N035 radar can simultaneously tracking 30 targets and engage 2 of the 30 with semi - active radar homing air - to - air missiles , and when using active radar homing missiles , the number of target it can simultaneously engage is increased four time to 8 . Bars - 29 . 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 m , 15 targets can be tracked at once when using track - while - scan mode , with 4 engaged at any one time . The radar has an average power output of 1 kW .