БРЭО бортовое радиоэлектронное оборудование (On-board radio-electronic equippement) Ш121 (Sh121) МИРЭС многофункциональный интегрированный радиоэлектронный систем (MIRES multifunctional integrated radio-electronic system) for weapons targeting N036 «Белка» (Byelka = squirrel) radar system. Improved version of N035 Irbis-E from Su-35S, developed by НИИП Научно-исследовательский институт приборостроения им. В.В. Тихомирова (NIIP Scientific-Research Institute of Instrument Design named after Tikhomirov) Zhukovsky. N036 - mounted in the nose cone forward-looking X band radar АФАР Активная фазированная антенная решётка (AFAR = AESA active electronically scanned array) with 1552 T/R modules. N036B - two side-looking X-band AESA radars with 358 T/R modules embedded in the cheeks of the forward fuselage, for wider angular coverage, especially ground observation (they are angled at a downward 15 degrees). N036L - two L-band AESA radars in wing's leading edge slats (secondary function is friend-or-foe indentification by system N036Sh Pokosnik (Reaper), also can be used for jamming of sattelite communication links). Probably antennas N036L can be installed also (or alternatively) in large movable leading edges of influx of the fuselage (LEVCON Leading Edge Vortex Controllers) as on T-50-05 prototype before accident. L402 «Гималаи» (Himalayas) - EW electronic warfare countermeasure suite which uses the N036 Byelka radar arrays and its own arrays (probably rear-looking AESA radar in tail, similar in size and shape to side-looking N036L radars), to detecting and jamming radiofrequency-bases systems. Mounted in the dorsal sting between the engines. Developed by KNIRTI (Kaluzhskyi Scientific Research Radio-Technical Institute) in Kaluga, manufactured by the «Сигнал» (Radioplant Signal) in Stavropol - subsidiaries of КРЭТ Концерн Радиоэлектронные технологии (KRET Concern Radio-Electronic Technologies). 101KS (КС Комплекс Самозащиты = KS Selfdefence Suite) ОЭИС - оптико-электронная интегрированная система «Атолл», изделие 101КС (product 101KS) (OEIS optical-electronic integrated system Atoll) with N036EVS computer and processor. Manufactured by the УОМЗ Производственное объединение «Уральский оптико-механический завод» (UOMZ Urals Optical and Mechanical Plant). 101KS-V (воздушная = Air): ОЛС-50M оптическая локационная система (OLS optical location station) = IRST infra-red search and tracking system to detect, identify, and track multiple airborne targets simultaneously. Located ahead of windshield on the starboard. The turret can be rotated backwards into a cruise position, exposing its rear hemisphere, which is covered with a radar-absorbing coating. Developed by NIIP. 101KS-O (оборонительная = Defence): laser-based DIRCM Direcional Infra Red Counter Measures system - one turret with laser jammer is mounted on top the fuselage behind of the cockpit, second under fuselage. 101KS-P (пилотажная, посадка = Pilotage, Landing): two wide-angle instrumental flight augmentors (small infrared and ultra-violet sensors) to help pilot in landing and low-altitude manouevers/flight. Installed in forward section of the canoe-shaped missile bays under wings. 101KS-U (ультрафиолетовая = Utra-violet): ultraviolet MAWS missile approach warning system against infra-red homing missiles. Two side-looking near cockpit, one under fuselage, one on top of fuselage (last one installed only on some prototypes). 101KS-N (наземная = Ground): advanced stabilised navigation and targeting system integrated into the airframe underside of forward fuselage: scannig mirror and automatic tracking unit, laser rangefinder/target indicator and laser spot tracker. optional 101KS-N Подвесной контейнер обзорной прицельно-поисковой системы 101КС-Н (Observation searching and targeting pod) = IRST optical infra-red search and tracking system to identifying and tracking ground targets, in external pod with rotary head. БИНС-СП-2M Бесплатформенная инерциальная навигационная система (BINS-SP2M Strapdown inertial navigation system based on three laser gyroscopes and three quartz accelerometers. Can determines position and motion parameters in the absence of satellite navigation, when GLONASS (Russia’s space-based satellite navigation system) SATNAV link is disrupted. eveloped by ОАО «Московский институт электромеханики и автоматики» (Moscov Institute of Electromechanics and Automatics), produced by KRET. Similar to Tu-160M2 and Su-35S systems. МСП Микроволновая система посадки = MLS microwave landing system. Комплекс Средств Связи С-111 = Communication suite S-111.

Not all antennas I can identify, so You must expected corrections.