The AN/ALR-67

radar warning receiver Radar warning receiver (RWR) systems detect the radio emissions of radar systems. Their primary purpose is to issue a warning when a radar signal that might be a threat is detected, like a fighter aircraft's fire control radar. The warning can the ...

is designed to warn an aircraft's crew of potentially hostile radar activity. It is an airborne threat warning and countermeasures control system built to be successor to the United States Navy's AN/ALR-45.

Northrop Grumman Corporation Northrop Grumman Corporation is an American multinational aerospace and defense technology company. With 90,000 employees and an annual revenue in excess of $30 billion, it is one of the world's largest weapons manufacturers and military techn ...

's Electronic Systems sector (Rolling Meadows, Illinois) was the main contractor for the AN/ALR-67(V) and (V)2. Raytheon Electronic Warfare Systems (Goleta, California) was the main contractor for the AN/ALR-67(V)3.

ALR-67(V)2

The AN/ALR-67 countermeasures warning and control system is the standard threat warning system for tactical aircraft and was specifically designed for the A-6E/SWIP,

AV-8B The McDonnell Douglas (now Boeing) AV-8B Harrier II is a single-engine ground-attack aircraft that constitutes the second generation of the Harrier family, capable of vertical or short takeoff and landing (V/STOL). The aircraft is primaril ...

, F-14B, F-14D and

F/A-18 The McDonnell Douglas F/A-18 Hornet is an all-weather, twin-engine, supersonic, carrier-capable, multirole combat aircraft, designed as both a fighter and attack aircraft (hence the F/A designation). Designed by McDonnell Douglas (now par ...

. The system detects, identifies and displays radars and radar-guided weapon systems in the C to J frequency range (about 0.5 to 20 GHz). The system also coordinates its operation with onboard fire-control radars, datalinks, jammers,

missile In military terminology, a missile is a guided airborne ranged weapon capable of self-propelled flight usually by a jet engine or rocket motor. Missiles are thus also called guided missiles or guided rockets (when a previously unguided rocket i ...

detection systems and

anti-radiation missiles An anti-radiation missile (ARM) is a missile designed to detect and home in on an enemy radio emission source. Typically, these are designed for use against an enemy radar, although jammers and even radios used for communications can also be t ...

. The AN/ALR-67(V)2 comprises the following units: * four small spiral high-band antennas to provide 360° azimuth RF coverage * four wideband, high-band quadrant receivers * a low-band array plus receiver to provide 360° azimuth low-band coverage * a narrowband

superheterodyne receiver A superheterodyne receiver, often shortened to superhet, is a type of radio receiver that uses frequency mixing to convert a received signal to a fixed intermediate frequency (IF) which can be more conveniently processed than the original carri ...

for signal analysis functions * twin

CPU A central processing unit (CPU), also called a central processor, main processor or just processor, is the electronic circuitry that executes instructions comprising a computer program. The CPU performs basic arithmetic, logic, controlling, and ...

* an azimuth display unit (ADU) * control unit. The AN/ALR-67(V)2 in turn has been given a significant enhancement in capability, through Engineering Change Procedure ECP-510 to the AN/ALR-67E(V)2 standard. The AN/ALR-67E(V)2 provides additional enhancements including a 10-fold improvement in detection ranges when in the presence of a wingman's radar signals; it also incorporates

inertial guidance system An inertial navigation system (INS) is a navigation device that uses motion sensors ( accelerometers), rotation sensors (gyroscopes) and a computer to continuously calculate by dead reckoning the position, the orientation, and the velocity (dire ...

(INS) stabilisation for accurate display in high ''g'' manoeuvres and during high roll maneuvers. The designation ALR-67B(V)2 is in connection with the ALR-67 systems fitted to Spain's EF-18 and Canadian's CF-18 aircraft. Over 1,600 AN/ALR-67(V) and AN/ALR-67(V)2 systems have been sold. The AN/ALR-67(V) has been supplied to the

U.S. Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage of ...

and U.S. Marine Corps and the air forces of Australia, Canada, Finland, Kuwait, Malaysia, Spain and Switzerland.

Raytheon AN/ALR-67(V)3

The AN/ALR-67(V)3 is commonly referred to as the Advanced Special Receiver (ASR) set. The receiver electronics unit has been upgraded to a fully channelized digital architecture with dual 32-bit processors, yet with an overall reduction in system size and weight. The Azimuth Display Indicator (ADI) is a 3 in (76.2 mm) diameter CRT or

LCD A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers. Liquid crystals do not emit light directly but in ...

cockpit display, carried over from the AN/ALR-67(V)2, used to show intercepted threats. The AN/ALR-67(V)3 also forms part of the

electronic countermeasures An electronic countermeasure (ECM) is an electrical or electronic device designed to trick or deceive radar, sonar, or other detection systems, like infrared (IR) or lasers. It may be used both offensively and defensively to deny targeting inf ...

programme, including an interface to the

ALE-50 towed decoy system The AN/ALE-50 towed decoy system is an electronic countermeasure tool designed by Raytheon to protect multiple US military aircraft from air-to-air and surface-to-air radar-guided missiles. The AN/ALE-50 towed decoy system is an anti-missile c ...

. In August 1999,

Raytheon Raytheon Technologies Corporation is an American multinational aerospace and defense conglomerate headquartered in Arlington, Virginia. It is one of the largest aerospace and defense manufacturers in the world by revenue and market capitali ...

was awarded an initial contract for full-rate production of the AN/ALR-67(V)3 for the U.S. Navy

F/A-18E/F Super Hornet The Boeing F/A-18E and F/A-18F Super Hornet are twin-engine, carrier-capable, multirole fighter aircraft variants based on the McDonnell Douglas F/A-18 Hornet. The F/A-18E single-seat and F/A-18F tandem-seat variants are larger and more ad ...

, totalling 34 complete installations, together with 40 spare quadrant receivers and five countermeasures receivers. These were delivered during 2001–02. Further production contracts followed, with the latest in April 2005, where Raytheon received its seventh production contract for 42 systems totalling US$44 million. This contract brought total orders to 284 receivers plus spares. It was reported on 13 September 2006 that the Australian Defence minister has accepted a recommendation to stop development of the ALR-2002 for the F/A-18, the RAAF will most likely install the ALR-67V(3) instead. On 3 August 2007
Deagel.com
reported that the

Defense Security Cooperation Agency The Defense Security Cooperation Agency (DSCA), as part of the United States Department of Defense (DoD), provides financial and technical assistance, transfer of defense matériel, training and services to allies, and promotes military-to-militar ...

notified

Congress A congress is a formal meeting of the representatives of different countries, constituent states, organizations, trade unions, political parties, or other groups. The term originated in Late Middle English to denote an encounter (meeting of ...

of a possible

foreign military sale The United States Department of Defense's Foreign Military Sales (FMS) program facilitates sales of U.S. arms, defense equipment, defense services, and military training to foreign governments. The purchaser does not deal directly with the defense ...

to Canada of AN/ALR-67(V)3 radar warning receivers as well as associated equipment and services. The total value, if all options are exercised, could be as high as $209 million. This notice of a potential sale is required by law; it does not mean that the sale has been concluded.

Other variants

A variant of this system, designated AN/ALR-67(V)4, was included in a proposed upgrade for the F-14A but was never implemented due to the retirement of those aircraft in the United States.

External links

AN/ALR-67 at FAS

Northrop Grumman product information on the ALR-67(V)2

Raytheon product information on the ALR-67(V)3

References

{{Raytheon Radar warning receivers Electronic warfare equipment Military electronics of the United States Raytheon Company products Radiofrequency receivers Equipment of the United States Air Force

Northrop Grumman Northrop Grumman Corporation is an American multinational aerospace and defense technology company. With 90,000 employees and an annual revenue in excess of $30 billion, it is one of the world's largest weapons manufacturers and military techn ... AN/ALR-67(V) and AN/ALR-67(V)2

Raytheon AN/ALR-67(V)3

Other variants

External links

References

Northrop Grumman Northrop Grumman Corporation is an American multinational aerospace and defense technology company. With 90,000 employees and an annual revenue in excess of $30 billion, it is one of the world's largest weapons manufacturers and military techn ...
AN/ALR-67(V) and AN/ALR-67(V)2