AWG-9

AWG-9
Lt. Gerald B. Parsons, USN · Public domain · source
Name	AWG-9
Origin	United States
Type	Missile guidance radar
Used by	United States Navy
Manufacturer	Hughes Aircraft Company
Production date	1958–1970s

AWG-9 The AWG-9 was a long-range, multi-target, track-while-scan radar system developed for carrier-based F-14 Tomcat air superiority operations. Designed to control the long-range AIM-54 Phoenix missile, it integrated search, track, and missile guidance functions to engage multiple high-value targets simultaneously. The radar formed a central component of Grumman's weapons suite and influenced subsequent developments in radar and fire-control system architectures.

Development and Design

Development began at Hughes Aircraft Company in response to requirements from the United States Navy, driven by lessons from the Vietnam War and strategic concerns during the Cold War. The AWG-9 combined innovations in phased-array concepts, pulse-Doppler techniques, and digital processing pioneered at laboratories such as MIT Lincoln Laboratory and by contractors including Raytheon. Design goals emphasized long-range detection of high-altitude targets like Tupolev Tu-95 and Myasishchev M-4 strategic bombers, simultaneous engagement of multiple targets, and integration with weapons such as the AIM-54 Phoenix and sensors on the F-14 Tomcat. Prototypes were evaluated at Naval Air Station Patuxent River with input from Naval Air Systems Command and operational feedback from squadrons like VF-1 and VF-2.

Technical Specifications

The AWG-9 used a mechanically slewed parabolic antenna with electronically gated receiver modules and analog-digital hybrid processing influenced by work at Bell Labs and Lincoln Laboratory. It provided search ranges exceeding 100 nautical miles against large targets and track ranges matched to the AIM-54 Phoenix engagement envelope specified by Naval Air Systems Command engineers. Key elements included a seeker interface, multiple-track correlator, and IFF integration compatible with Sperry Corporation and Northrop Grumman avionics. Power was supplied through onboard generators coordinated with Grumman F-14 electrical systems. The system implemented look-down/shoot-down capability using pulse-Doppler clutter rejection algorithms inspired by earlier research at General Electric and implemented in contemporaneous radars such as the AN/APG-63.

Operational History

Entered service aboard USS Enterprise (CVN-65) and other United States Navy aircraft carrier air wings during the 1970s, supporting fleet air defense during Cold War naval deployments and responses to crises such as operations off Libya and tensions in the Mediterranean Sea. AWG-9-equipped aircraft participated in intercepts involving aircraft types including Sukhoi Su-22, Mikoyan-Gurevich MiG-23, and surveillance platforms like the Ilyushin Il-38. Fleet squadrons coordinated AWG-9 operations with airborne early warning assets such as the E-2 Hawkeye and surface ships including USS America (CV-66). Maintenance and upgrades were managed through Naval Air Depot logistics chains and contractor support from Hughes Aircraft Company and later Raytheon affiliates.

Variants and Upgrades

Incremental improvements produced series upgrades addressing reliability, processing power, and electronic counter-countermeasures, often retrofitted during depot overhauls at Naval Air Station North Island and Naval Air Station Jacksonville. Upgrade paths incorporated components developed by Texas Instruments, Honeywell, and Fluor Corporation subcontractors, and were informed by test programs at Patuxent River Naval Air Station. Compatibility enhancements enabled interface with newer weapons and navigation systems from firms such as Litton Industries and Rockwell International. Proposed export variants and conceptual follow-ons influenced design choices in later radars produced by Raytheon and Northrop Grumman for platforms like the F-15 Eagle and F/A-18 Hornet.

Combat Performance and Incidents

Operational evaluations highlighted AWG-9 capability to simultaneously track and engage multiple targets, demonstrated in exercises with NATO forces and during real-world intercepts involving aircraft from Soviet Air Force and allied air arms. Incidents included challenges posed by electronic warfare suites fielded on aircraft such as MiG-25 and by surface-to-air threats like the S-75 Dvina, prompting tactical adaptations by squadrons like VF-84 and VF-31. Logistics and repair issues occasionally grounded aircraft during deployments aboard ships such as USS John F. Kennedy (CV-67), while friendly-force fratricide concerns led to refinements in Identification Friend or Foe procedures developed with Naval Research Laboratory participation.

International Operators

The AWG-9 was primarily fielded by the United States Navy; no foreign military purchased the system owing to integration with F-14 Tomcat airframes and export controls overseen by Department of Defense export policies and the Arms Export Control Act. Elements of AWG-9 technology and lessons influenced radars deployed by allied services including aspects seen in systems used by Royal Air Force-operated platforms and naval aviation forces in NATO partner navies. Decommissioning and retirement activities were coordinated with entities such as Naval Air Systems Command and contractors including Hughes Aircraft Company and its successors.

Category:Aircraft radars