Electronic Warhare System
Russian sources have claimed that the electronic warfare systems of Su-30MKK utilizes the latest technologies available in Russia and the radar warning receivers are so effective that the information provided by RWR alone would be enough to provide targeting information for Kh-31P anti-radiation missile without using other detection systems on board, though information can also be provided by L-150 ELINT system, which can be used in conjunction with Kh-31P. The maximum range of the RWR is termed at several hundred kilometers, and based on the 200 km maximum range of the Kh-31P anti-radiation missile, the maximum should be at least that much. The threat information obtained from RWRs can be either provided on the LCD MFDs (showing the most dangerous four targets) for the pilot in the manual mode, or be used automatically. The active jamming pods are mounted on the wing tips, and the APP-50 decoy launcher is mounted near the tail cone with 96 decoys of different kinds. Domestic Chinese electronic warfare systems including BM/KG300G and KZ900 can also be carried after modification of onboard system, but such modification was neither part of the original deal nor the upgrade deal with Russians, instead, this was implemented indigenously by Chinese themselves during the incremental upgrades.
Flight Control
The fly by wire (FBW) control with quadruple redundancy designed by Russkaya Avionika is the same system used for the Su-30MKI. Russian sources have confirmed the claims of domestic Chinese sources that an indigenous Chinese system developed is near its completion and it will be used to replace the original Russian system. However, this has yet to be confirmed by western sources and official Chinese governmental sources, which only acknowledged in the 6th Zhuhai Airshow that domestic fly-by-wire (FBW) control with quadruple redundancy is developed to accommodate domestic engines, but nothing was mentioned about whether the domestic system and engines would be used on future Su-30MKK upgrades.
Flight Instruments
The Su-30MKK features a glass cockpit of Russkaya Avionika JSC, with each pilot having two large multi-function displays, rear pilot displays arranged in a rather unconventional way: one atop of the other. Two 178 mm × 127 mm (7.0 in × 5.0 in) MFI-9 colour LCD MFDs are located in the front seat, a single MFI-9 and a 204 mm × 152 mm (8.0 in × 6.0 in) MFI-10 color LCD MFDs are located in the rear seat. The head-up display (HUD) is also developed by Russkaya Avonika JSC, designated as SILS-30.
Helmet Mounted Sight
The original ASP-PVD-21 series helmet mounted sight (HMS) with only limited field of view (FoV) was replaced by more advanced Sura-K HMS system, but Chinese have been replacing the Russian HMS with more advanced domestic system. Publicized photos and video clips from the official Chinese governmental sources such as CCTV-7 in 2007 and PLA pictorial magazine have confirmed the western claims of Chinese is replacing the original Russian helmet mounted sights (HMS) with more capable domestic ones.
Mission Computer
The new mission computer was jointly developed by the Russian National Aeronautical System Science Research Academy and Russkaya Avionika JSC, designated as MVK, capable of performing ten billion FLOPS. All avionics on board is built to MIL-STD-1553 standard. There are four computers based on Baguet-55 series processor, one for central avionics control, two for information display, and one for fire control.
Navigation
The integrated navigational systems designated as PNS-10, incorporating the A737 subsystem. The system is capable of utilizing both the GPS and GLONASS, but it is rumored that Chinese is developing a similar system to add the capability to utilize domestic BeiDou Navigation Satellite System
Airborne Radar
Airborne radar on board Su-30MKK has been continuously upgraded and a total of three were confirmed so far, all of which are controlled by the RLPK-27VE integrated radar targeting system, developed from the RLPK-27 system of the single seat Su-27. Both systems are designed by Viktor Grishin of the Tikhomirov Scientific Research Institute of Instrument Design (NIIP), and is compatible with various radar and weaponry systems.
N001VEP radar: The first 20 Su-30MKK have an N001VEP Passive electronically scanned array (PESA) fire-control radar by the Chief designer Viktor Grishin of the Tikhomirov Scientific Research Institute of Instrument Design (NIIP) with a range up to 100 km, able to concurrently track 10 targets, and engage four air targets or two ground targets of the 10 tracked. The N001VEP is developed from the earlier N001VE radar designed by the same designer, which was used on the Chinese J-11A. The original Baguet series processor of the N001VE radar is replaced by its successor Baguet-55 series. Like its predecessor, the new radar has incorporated the moving target indication (MTI) and mapping capabilities, and the capability to detect low flying or hovering helicopters. The scan sector of it is 120 degrees while the elevation is 110 degrees.
Zhuk (radar)-MS radar: From the 21st Su-30MKK on, the N001VEP radar is replaced by the Zhuk-MS (Beetle-MS) fire control radar of Tikhomirov (NIIP)'s competitor, Phazotron (NIIR), which also adopts a slotted planar array antenna like N001VEP radar. The new radar has longer range coverage (up to 150 km) and is able to guide a greater variety of weapons systems. The number of targets that can be engaged is identical to that of the N001VEP radar, but the number that can be simultaneously tracked has been doubled to 20. The Zhuk (Beetle)-MS radar is an improvement of the earlier Zhuk (Beetle) radar designed for Su-27 and MiG-29 upgrades, and in comparison to the original Zhuk radar, the Zhuk-MS has the following improvements in addition to increased range and number of targets tracked/engaged:
The antenna diameter is increased to 960 mm from the original 680 mm of Zhuk (Beetle) radar
The peak power is increased to 6 kW from the original 5 kW of Zhuk (Beetle) radar
The average power is increased to 1.5 kW from the original 1 kW of Zhuk (Beetle) radar
Contrary to many erroneous claims, Zhuk-MS is not a phased array radar, but a slotted planar array antenna.
Zhuk-MSE radar: The Zhuk-MS has been replaced by its successor, Zhuk-MSE in the incremental upgrades of Su-30MKK, and previous Zhuk-MS are being upgraded to the Zhuk-MSE level. In comparison to the predecessor most performance parameters remain the same, but the number of ground targets that can be simultaneously engaged is increased to four from the original two. Like Zhuk-MS, this radar has also been erroneously reported to be a phased array radar when in fact, it utilizes a slotted planar array antenna. The designer Phazotron has claimed the new radar has better ECCM capabilities than earlier models.
FIre Control System
The fire control system on board integrates the radar, optronics, helmet-mounted sight, electronic warfare gears including radar warning receivers, and data links. The system consists of two subsystems: the SUV-VEP air-to-air subsystem and the SUV-P air-to-ground subsystem.
SUV-VEP: this air-to-air subsystem is capable of controlling six air-to-air missiles, which is greater than the maximum number of targets the airborne radar on board Su-30MKK can simultaneously engage, thus leaving rooms for radar improvement, which would be later exploited when the new passive electronically scanned array radars have been installed on Su-30MK2. The SUV-VEP subsystem is also capable of controlling air-to-sea missions, and the fire control of Kh-31A and Kh-35 anti-ship missiles are usually provided by SUV-VEP air-to-air subsystem instead of SUV-P air-to-ground subsystem. The subsystem of SUV-VEP system includes four major portions:
SEI-31-10 Integrated Display system: Used to control LCD MFDs.
OEPS-30 optronic (electro-optical) detection system: Chinese call this system optronic radar system, and it consists of two major components:
OLS-30 (52Sh) Infra-red search and track weighing 200 kg includes laser and IR sensors. In comparison to its predecessor OLS-27 (Izdeliye 36Sh) on Su-27, the IR detection range nearly doubled to > 90 km from the original 50 km. The range of laser range finder is increased to > 10 km from the original 6 km.
Sura-K helmet mounted system (HMS): The field of view (FoV) is greatly increased to +/- 60 degrees in comparison to the +/- 8 degrees of the ASP-PVD-21 HMS originally used on Su-27.
IFF and airborne radar are also controlled by SUV-VEP system.
SUV-P: this air-to-ground subsystem utilizes identical hardware of SUV-VEP air-to-air subsystem, but with a different processing requirement. This subsystem is mainly used for air-to-surface missiles such as Kh-59, and acts as an interface between the system on board the aircraft and the designated targeting pods of the air-to-surface missiles that can not be controlled directly by the onboard avionics. The primary subsystem of SUV-P system is SUO-30PK subsystem and A-737 satellite navigational subsystem.
SUO-30PK weaponry control subsystem: though Kh-31 is often controlled by SUV-VEP air-to-air system, it can also be controlled via SUV-P system via SUO-30PK subsystem, which can also control L-150 ELINT system. SUO-30PK system also controls other missiles such as Kh-59, an air-to-ground missiles that is controlled via Tekon targeting system in the APK-9E pod. Other SUO-30PK subsystem is developed by Aviation Automation Design bureau at Kursk, and it can be used to control unguided air-to-ground weaponry.
Both the SUV-VEP and SUV-P systems were adopted to upgrade the single seat Su-27SK in Chinese inventory, and a joint team of Tikhomirov Scientific Research Institute of Instrument Design (NIIP) and State Instrumentation Plant at Ryazan was named as the primary contractor. The modified SUV-VEP system adopted to upgrade Chinese Su-27SK was designated as SUV-VE, while the modified SUV-P system adopted to upgrade Chinese Su-27SK was designated as SUV-PE. The original analog dial indicator on flight dashboard of Su-27SK were replaced by two 6 in x 6 in MFI-10-6M and a MFIP-6 LCD MFDs. According to Russian claim, over 60 Chinese Su-27SK have been upgraded by the end of 2006.