China’s New J-20 Equipped with EODAS Similar to F-35 Surpasses F-22


J-20 is designed for grabbing air dominance from US F-22 but F-35 is a later fighter than F-22. J-20’s designers want it to have as advanced functions and performance as F-35. As a result, it is a better rival to F-22 as it is installed with an EODAS similar to F-35 but F-22 does not have such a system.

As for EODAS’ wonderful functions, I am going to give the passages of its inventor Northrop Grumman’s article “AN/AAQ-37 Distributed Aperture System (DAS) for the F-35” on it below:

Northrop Grumman has developed the only 360 degree, spherical situational awareness system in the electro-optical distributed aperture system (DAS). The DAS surrounds the aircraft with a protective sphere of situational awareness. It warns the pilot of incoming aircraft and missile threats as well as providing day/night vision, fire control capability and precision tracking of wingmen/friendly aircraft for tactical maneuvering.

Designated the AN/AAQ-37 and comprising six electro-optical sensors, the full EO DAS will enhance the F-35’s survivability and operational effectiveness by warning the pilot of incoming aircraft and missile threats, providing day/night vision and supporting the navigation function of the F-35 Lightning II’s forward-looking infrared sensor.

The DAS provides:

•Missile detection and tracking
•Launch point detection
•Situational awareness IRST & cueing
•Weapons support
•Day/night navigation

In addition to developing the EO DAS, Northrop Grumman Electronic Systems is supplying the F-35’s AN/APG-81 advanced electronically scanned array (AESA) fire-control radar. The AESA radar is designed to enable the pilot to effectively engage air and ground targets at long range, while also providing outstanding situational awareness.

F-35 DAS and APG-81 radar demonstrate ability to detect, track, target ballistic missiles

Northrop Grumman Corporation recently demonstrated the ballistic missile detection, tracking and targeting capabilities of the company’s AN/AAQ-37 distributed aperture system (DAS) and AN/APG-81 active electronically scanned array (AESA) radar, both of which are featured on the F-35 Joint Strike Fighter (JSF) aircraft. Northrop Grumman’s DAS and APG-81 autonomously detected, tracked and targeted multiple, simultaneous ballistic rockets. The DAS autonomously detected all five rockets, launched in rapid succession, and tracked them from initial launch well past the second stage burnout. Press release.

F-35 DAS demonstrates hostile fire detection capability

While being flown on Northrop Grumman’s BAC 1-11 test aircraft, the DAS detected and located tank fire from an operationally significant distance. In addition to artillery, the system is able to simultaneously detect and pinpoint the location of rockets and anti-aircraft artillery fired in a wide area. Although hostile fire detection is not an F-35 requirement for the DAS, the system design makes it ideal for this mission. This inherent capability enables DAS to harvest, process and deliver key battlespace information to ground forces and other aircraft autonomously, without the need for cueing or increasing pilot workload.

China has kept J-20 a mystery so that we have no official source of information about J-20. However Chinese military analysts and fans have great interest in J-20, especially in the question of whether it is a rival to F-22 for air dominance.

The photos below are those of J-20, based on which analysts believe the new version of J-20 is equipped with EODAS. The slots in red circles in the photos are believed to be the locations of the sensors of the J-20’s EODAS system.

Optical slot on J-20's nose

Optical slot on J-20’s nose

EODAS slot in the belly of the new version of J-20

EODAS slot in the belly of the new version of J-20

EODAS slots in old version J-20

EODAS slots in old version J-20

Sources: huanqiu.com “Super functions of China’s J-20 to kill US F-22: The secret lies in the slots on its nose” and qianzhan.com “J-20 surpasses US F-22 by using EODAS” (summary by Chan Kai Yee based on the reports in Chinese)

Source: Northrop Grumman “AN/AAQ-37 Distributed Aperture System (DAS) for the F-35”

Related posts:

  • China’s J-20 Stealth Fighter Jet to Be Commissioned in 2017 Using Russian Engines dated March 17, 2014
  • China’s New J-20 with More Powerful Engine, Better Undetectability–Major General Zhu Heping dated March 5, 2014
  • Maiden Flight of New-Version J-20 Installed with China-made WS-15 Engine with 18-ton Thrust dated March 1, 2014
  • China Breakthrough in Providing Good Engines for J-20 Stealth Fighter Jet dated February 27, 2014
  • Details of New-Version J-20 Stealth Fighter Jet with Lots of Improvement dated January 19, 2014
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