Erieye

The Erieye radar system is an Airborne Early Warning and Control System (AEW&C) developed by Saab Electronic Defence Systems (formerly Ericsson Microwave Systems) of Sweden. It uses active electronically scanned array (AESA) technology. The Erieye is used on a variety of aircraft platforms, such as the Saab 340 and Embraer R-99. It has recently been implemented on the Bombardier Global 6000 aircraft as the GlobalEye.

Erieye
Erieye radar mounted on a fuselage
Country of originSweden
Introduced1996
TypeMulti-mode active electronically scanned array (AESA) pulse-Doppler radar
FrequencyS band
Range450 km
Altitude> 20 km (> 65,000 ft)
Azimuth150° to each side

The Erieye Ground Interface Segment (EGIS; not to be confused with the Aegis combat system) is a major component of the software used by the Erieye system.

The radar provides 300 degree coverage and has an instrumental range of 450 km and detection range of 350 km in a dense hostile electronic warfare environment—in heavy radar clutter and at low target altitudes. In addition to this, the radar is also capable of identifying friends or foes, and has a sea surveillance mode.

The Erieye system has full interoperability with NATO air defence command and control systems.

History
A Saab 340 AEW&C

In 1985 Ericsson Microwave Systems were contracted by the Swedish Defence Material Administration to develop what would become the PS-890 Erieye AEW radar. In the same year a dummy dual-sided phased array antenna was tested on a twin-engined Fairchild Metro aircraft. In 1987 the Metro aircraft was fitted with the radar system for flight trials. Production of the radar started in 1993 following an order for six radars for the Swedish Air Force for fitment in Saab 340 aircraft. The first two production radars were delivered in 1996. The name Erieye is short for Ericsson eye.

Pakistan
Main article: Operation Swift Retort
A SAAB-2000 ERIEYE of the Pakistan Air Force

In February of 2019, the Pakistan Air Force launched retaliatory airstrikes on Indian military installations at Indian Administered Jammu and Kashmir in response to India's violation of Pakistani airspace and the bombing of a wooded area at Balakot. While fighter jets from various PAF squadrons executed the airstrikes, Saab-2000 Erieye AWACS along with DA-20 EW supported them throughout the operation.[1][2]

Design
The Saab 2000 Erieye
An Embraer R-99 Erieye of the Hellenic Air Force

The Erieye AEW&C mission system radar is an active, phased-array, pulse-doppler sensor that can feed an onboard operator architecture or downlink data (via an associated datalink subsystem) to a ground-based air defence network. The system employs a large aperture, dual-sided antenna array housed in a dorsal 'plank' fairing. The antenna is fixed, and the beam is electronically scanned, which provides for improved detection and significantly enhanced tracking performance compared with radar-dome antenna systems. Erieye detects and tracks air and sea targets out to the horizon, and sometimes beyond this due to anomalous propagation — instrumented range has been measured at 450 kilometres (280 mi). Typical detection range against fighter-sized targets is approximately 425 kilometres (264 mi), in a 150° broadside sector, both sides of the aircraft. Outside these sectors, performance is reduced in forward and aft directions.

Other system features include: Adaptive waveform generation (including digital, phase-coded pulse compression); Signal processing and target tracking; track while scan (TWS); low side lobe values (throughout the system's angular coverage); low- and medium-pulse repetition frequency operating modes; frequency agility; Air-to-air and sea surveillance modes; and target radar cross-section display.

The radar operates as a medium- to high-PRF pulse-Doppler, solid-state radar, in E/F-band (3 GHz), incorporating 192 two-way transmit/receive modules that combine to produce a pencil beam, steered as required within the operating 150° sector each side of the aircraft (one side at a time). It is understood that Erieye has some ability to detect aircraft in the 30° sectors fore and aft of the aircraft heading, but has no track capability in this sector.[3]

Development

GlobalEye consists of a suite of sensors using Erieye ER (Extended Range) radar and mission system, installed in the Bombardier Global 6000 long-range business jet.[4]

Operators
Map with Saab Erieye operators in blue
 Brazil
 Greece
 Mexico
 Pakistan

 Poland

 Saudi Arabia
 Sweden
 Thailand
 United Arab Emirates

Applications

References
  1. Alan Warnes (19 March 2020). "Operation Swift Retort one year on". Key Military.com. Retrieved 14 August 2022.
  2. Etfa Khurshid Mirza (6 November 2019). "A Fine Retort". Centre for Aerospace & Security Studies (CASS). Retrieved 14 August 2022.
  3. "Erieye AEW&C Airborne Early Warning & Control mission system radar (Sweden), Airborne radar systems". Jane's Avionics. 4 April 2011. Archived from the original on June 16, 2012.
  4. "Saab launches GlobalEye multi-role airborne surveillance system". Airforce Technology. 17 February 2016.
  5. "Poland signs for Saab 340 AEW&C aircraft". Janes.com. Retrieved 2023-07-27.
  6. "Sweden initiates military cooperation with Saudi Arabia" (in Swedish). Aftonbladet. Archived from the original on 2011-05-14.
  7. "Royal Saudi Air Force Saab 2000 Erieyes Now in Service". Tangent Link.
  8. Saab signs contract with United Arab Emirates for airborne surveillance system
  9. "UAE, Saab Strike $1.27 Billion Erieye Deal - Dubai Air Show 2015 content from Aviation Week". Aviation Week.
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