The erieye radar system is the most avanced radar surveillance aircraft in in Swedish airforce. 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 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 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.
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 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.
United Arab Emirates – 2 ordered.
Embraer E-99 (EMB-145)
Saab 340 AEW&C
Fairchild Swearingen Metroliner (trials)
The Swedish Air Force (Swedish: Flygvapnet) is the air force branch of the Swedish Armed Forces.
The Swedish Air Force was created on July 1, 1926 when the aircraft units of the Army and Navy were merged. Because of the escalating international tension during the 1930s the Air Force was reorganized and expanded from four to seven squadrons. When World War II broke out in 1939 further expansion was initiated and this substantial expansion was not finished until the end of the war. Although Sweden never entered the war, a large air force was considered necessary to ward off the threat of invasion and to resist pressure through military threats from the great powers. By 1945 the Swedish Air Force had over 800 combat-ready aircraft, including 15 fighter divisions.
A major problem for the Swedish Air Force during World War II was the lack of fuel. Sweden was surrounded by countries at war and could not rely on imported oil. Instead domestic oil shales were heated to produce the needed petrol.
Expansion during the Cold War
The Swedish Air Force underwent a rapid modernization from 1945. It was no longer politically acceptable to equip it with second-rate models. Instead, the air staff purchased the best it could find from abroad,