Erieye radar Information & Erieye radar Links at HealthHaven.com

**Erieye**
	The Erieye radar mounted on a Saab 340.;
Country of origin	Sweden
Introduced	1996
Type	Multi-mode active electronically scanned array (AESA) pulse doppler radar
Frequency	S-band
Range	450 km
Altitude	> 20 km (> 65,000 ft)
Azimuth	150° to each side

The Erieye radar system, is an Airborne Early Warning and Control System (AEW&C) developed by Saab Microwave Systems (formerly Ericsson Microwave Systems) of Sweden. It is based on the Active Electronically Scanned Array (AESA). The Erieye is used on a variety of aircraft platforms, such as the Brazilian Embraer E-99 or EMB-145. It has recently been implemented on the Saab 2000 aircraft.

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 450km 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.

Sweden has loaned two of these systems to Greece, while they are still owned by the Swedish Air Force. SAAB signed an 8 billion kronor provisional contract to supply 6 of these systems to Pakistan, which was finalized in June 2006 at four aircraft, one of which has been delivered to date.^[1]

Recently, Royal Thai Air Force signed the contact to order a Erieye system equipped on Saab 340 and has the option to order another system. This order is a part of Gripen order.

[edit] Design

The Saab 2000 Erieye AEW&C, developed for the Pakistan Air Force, on display at the 2008 Farnborough Airshow.

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 beyond due to anomalous propagation)—instrumented range has been measured at 450 km. Typical detection range against fighter-sized targets is approximately 425 km, 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 trackingTrack While Scan (TWS)Low sidelobe values (throughout the system's angular coverage)Low- and medium-pulse repetition frequency operating modesFrequency agilityAir-to-air and sea surveillance modesTarget radar cross-section displayThe 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.^[2]