AGM-88 HARM Anti-Radiation Guided Missile

AGM-88 HARM Anti-Radiation Guided Missile

The AGM-88 HARM (High-speed Anti-Radiation Missile) is a tactical, air-to-surface anti-radiation missile designed to home in on electronic transmissions coming from surface-to-air radar systems. It was originally developed by Texas Instruments as a replacement for the AGM-45 Shrike and AGM-78 Standard ARM system. Production was later taken over by Raytheon Corporation when it purchased the defense production business of Texas Instruments. AGM-88E is produced by Orbital ATK (Northrop Grumman).

Description

The AGM-88 can detect, attack and destroy a radar antenna or transmitter with minimal aircrew input. The proportional guidance system that homes in on enemy radar emissions has a fixed antenna and seeker head in the missile’s nose. A smokeless, solid-propellant, booster-sustainer rocket motor propels the missile at speeds over Mach 2.0. The HARM missile was a program led by the U.S. Navy, and it was first carried by the A-6E, A-7, and F/A-18A/B aircraft, and then it equipped the EA-6B aircraft. RDT&E for use on the F-14 aircraft was begun, but not completed. The U.S. Air Force (USAF) put the HARM onto the F-4G Wild Weasel aircraft, and later on specialized F-16s equipped with the HARM Targeting System (HTS). The HTS pod, used by the USAF only, allows F-16s to detect and automatically target radar systems with HARMs instead of relying on the missile’s sensors alone.

Deployment

The HARM missile was approved for full production in March 1983, obtained initial operating capability (IOC) on the A-7E Corsair II in late 1983 and then deployed in late 1985 with VA-46 aboard the aircraft carrier USS America. In 1986, the first successful firing of the HARM from an EA-6B was performed by VAQ-131. It was soon used in combat—in March 1986 against a Libyan SA-5 site in the Gulf of Sidra, and then during Operation Eldorado Canyon in April. HARM was used extensively by the Navy, Marine Corps, and the Air Force in Operation Desert Storm during the Persian Gulf War of 1991.

During the Gulf War, the HARM was involved in a friendly fire incident when the pilot of an F-4G Wild Weasel escorting a B-52 bomber mistook the latter’s tail gun radar for an Iraqi AAA site. (This was after the tail gunner of the B-52 had targeted the F-4G, mistaking it for an Iraqi MiG.) The F-4 pilot launched the missile and then saw that the target was the B-52, which was hit. It survived with shrapnel damage to the tail and no casualties. The B-52 was subsequently renamed In HARM’s Way.

“Magnum” is spoken over the radio to announce the launch of an AGM-88. During the Gulf War, if an aircraft was illuminated by enemy radar a bogus “Magnum” call on the radio was often enough to convince the operators to power down. This technique would also be employed in Serbia during air operations in 1999.

In 2013 President Obama offered the AGM-88 to Israel for the first time.

AGM-88E AARGM

A newer upgrade, the AGM-88E Advanced Antiradiation Guided Missile (AARGM), features the latest software, enhanced capabilities intended to counter enemy radar shutdown, and passive radar using an additional active millimeter-wave seeker. It was released in November 2010, and it is a joint venture by the US Department of Defense and the Italian Ministry of Defense, produced by Orbital ATK (Northrop Grumman).

In November 2005, the Italian Ministry of Defense and the U.S. Department of Defense signed a Memorandum of Agreement on the joint development of the AGM-88E AARGM missile. Italy was providing $20 million of developmental funding as well as several million dollars worth of material, equipment, and related services. The Italian Air Force was expected to buy up to 250 missiles for its Tornado ECR aircraft. A flight test program was set to integrate the AARGM onto Tornado ECR’s weapon system.

The U.S. Navy demonstrated the AARGM’s capability during Initial Operational Test and Evaluation (IOT&E) in spring 2012 with live firing of 12 missiles. Aircrew and maintenance training with live missiles was completed in June.

The Navy authorized Full-Rate Production (FRP) of the AARGM in August 2012, with 72 missiles for the Navy and nine for the Italian Air Force to be delivered in 2013. A U.S. Marine Corps F/A-18 Hornet squadron will be the first forward-deployed unit with the AGM-88E.

In September 2013, ATK delivered the 100th AARGM to the U.S. Navy. The AGM-88E program is on schedule and on budget, with Full Operational Capability (FOC) planned for September 2014. The AGM-88E was designed to improve the effectiveness of legacy HARM variants against fixed and relocatable radar and communications sites, particularly those that would shut down to throw off anti-radiation missiles, by attaching a new seeker to the existing Mach 2-capable rocket motor and warhead section, adding a passive anti-radiation homing receiver, satellite and inertial navigation system, a millimeter-wave radar for terminal guidance, and the ability to beam up images of the target via a satellite link just seconds before impact.

This model of the HARM will be integrated onto the F/A-18C/D, F/A-18E/F, EA-18G, and Tornado ECR aircraft, and later on the F-35 (externally).

In September 2015, the AGM-88E successfully hit a mobile ship target in a live-fire test, demonstrating the missile’s ability to use antiradiation homing and millimeter-wave radar to detect, identify, locate, and engage moving targets.

In December 2019, the German Air Force ordered the AARGM. On August 4, 2020, Northrop Grumman’s Alliant Techsystems Operations division, based in Northridge, California, was awarded a $12,190,753 IDIQ contract for AARGM depot sustainment support, guidance section and control section repair, and equipment box test and inspection. On August 31, 2020, the same Northrop Grumman division was allocated roughly $80.9 million to develop new technology for the AARGM. Neither contract was awarded in free, open competition.

AGM-88F HCSM

Although the US Navy/Marine Corps chose the Orbital ATK-produced AGM-88E AARGM, Raytheon developed its own update of the HARM called the AGM-88F HCSM (HARM Control Section Modification), tested in conjunction with and ultimately for the US Air Force. It incorporates similar upgrade features as the AARGM, and although it is not yet listed for export, existing HARM users have shown interest.

AGM-88G AARGM-ER

The Navy’s FY 2016 budget included funding for an extended range AARGM-ER that uses the existing guidance system and warhead of the AGM-88E with a solid integrated rocket-ramjet for double the range. Development funding will last to 2020. In September 2016, Orbital ATK unveiled its extended-range AARGM-ER, which incorporates a redesigned control section and 11.5 in (290 mm)-diameter rocket motor for twice the range and internal carriage on the Lockheed Martin F-35A and F-35C Lightning II. Internal carriage on the F-35B isn’t possible due to internal space limitations. The U.S. Navy awarded Orbital ATK a contract for AARGM-ER development in January 2018. The USAF has formally joined the AARGM-ER program, and is involved in internal F-35A/F-35C integration work.

The AARGM-ER would serve as the basis for the USAF’s land-attack Stand in Attack Weapon (SiAW).

Specifications

Mass 355 kilograms (783 lb)
Length 4.1 metres (13 ft)
Diameter 254 millimetres (10.0 in)
Warhead WDU-21/B blast/fragmentation in a WAU-7/B warhead section, and later WDU-37/B blast-fragmentation warhead.
Warhead weight 66 kilograms (146 lb)
Detonation
mechanism
FMU-111/B laser proximity fuze

Engine Thiokol SR113-TC-1 dual-thrust rocket engine
Wingspan 1.1 metres (3.6 ft)
Propellant Solid fuel
Operational
range
150 kilometres; 92 miles (80 nmi)
Maximum speed 2,280 km/h (1,420 mph) (Mach 1.84)
Guidance
system
Passive radar homing with home-on-jam, GPS/INS and millimeter-wave active radar homing in the E variant. 500-20,000 MHz for AGM-88C
Launch
platform
F-4G, EA-6B, F-15EF-16F/A-18EA-18G, Tornado IDS/ECR, Eurofighter TyphoonF-35[Not internally], and others

Operators

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