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| AGM-84L SLAM-ER | |
|---|---|
| Name | AGM-84L SLAM-ER |
| Origin | United States |
| Type | Air-to-surface missile |
| Manufacturer | McDonnell Douglas / Boeing |
| Service | 2000s–present |
| Diameter | 0.34 m |
| Wingspan | 1.12 m |
| Length | 4.08 m |
| Weight | 745 kg |
| Speed | subsonic |
| Range | 270+ km (combat dependent) |
| Filling | WDU-18/B penetrating blast-fragmentation |
| Guidance | GPS/INS, infrared imaging, passive anti-radiation, data-link |
AGM-84L SLAM-ER The AGM-84L SLAM-ER is an extended-range, precision standoff air-to-surface missile developed from the AGM-84 Harpoon and the earlier Standoff Land Attack Missile (SLAM). Built by McDonnell Douglas (later Boeing), the SLAM-ER integrates inertial guidance, GPS, infrared imaging, and data-link capabilities to prosecute well-defended, time-sensitive targets from stand-off ranges. It has been employed by the United States Navy, Royal Saudi Air Force, and other operators in regional conflicts and power-projection missions.
Development of the SLAM-ER traces to Cold War-era needs to attack high-value targets while minimizing exposure of aircrews. The program built on the AGM-84 Harpoon anti-ship family and the earlier AGM-84E SLAM variant, with major upgrades driven by lessons from operations over Kosovo, Iraq, and Afghanistan. McDonnell Douglas pursued enhancements in seeker sensitivity, navigation resilience, and warhead effect to defeat hardened structures and mobile emitters. Funding and test programs involved coordination with the Naval Air Systems Command, testing ranges such as China Lake, and integration into platforms including the F/A-18 Hornet and F-15E Strike Eagle.
The SLAM-ER retains the Harpoon-derived airframe while incorporating a multi-mode seeker and a larger fuel load for extended range. The missile uses a solid rocket booster for launch and a turbojet/rocket sustainment approach in some mission profiles to reach standoff distances. Structural design reflects lessons from the Wormwood Project of aerodynamics research and subsonic cruise shaping used in contemporary cruise missiles like the Tomahawk. The warhead is a penetrating blast-fragmentation charge optimized for reinforced concrete and light armor. Avionics include environmental hardening consistent with standards set by MIL-STD-810 and electronic protection measures influenced by programs overseen by Defense Advanced Research Projects Agency and National Security Agency requirements for protected navigation.
SLAM-ER employs a layered guidance suite: an inertial navigation system augmented by Global Positioning System updates, an imaging infrared (IIR) seeker for terminal homing, and a two-way data-link for in-flight retargeting. Passive anti-radiation capability allows engagement of emitters similar to concepts from the AGM-88 HARM lineage. Targeting workflows integrate with aircraft systems such as the AN/APG-73 and mission planning tools tied to the Joint Mission Planning System and Tactical Tomahawk architecture. The data-link supports mid-course updates from platforms like the P-3 Orion, E-2 Hawkeye, or airborne tankers equipped with mission avionics, and supports coordination with assets such as MQ-9 Reaper drones and AC-130 Gunship designation feeds.
SLAM-ER entered operational status in the late 1990s and saw deployment in post–Cold War contingency operations. It has been integrated on carrier air wings aboard USS Nimitz (CVN-68) and USS Kitty Hawk (CV-63), and deployed from expeditionary air bases supporting Operation Enduring Freedom and Operation Iraqi Freedom. Export approvals and Foreign Military Sales procedures enabled deliveries to allies under Security Assistance directives coordinated by Defense Security Cooperation Agency and Department of Defense authorities. Exercises and deployments included interoperability trials with NATO partners and CENTCOM theater planning.
Variants include baseline SLAM, the SLAM-ER improved seeker and avionics package, and platform-specific integration kits for types like the F-16 Fighting Falcon and S-3 Viking. Upgrade paths emphasized improved IIR resolution, GPS anti-jam capability linked to Selective Availability Anti-Spoofing Module concepts, and software-defined seeker improvements influenced by modern sensor-fusion programs from Raytheon and Lockheed Martin research. Block upgrades addressed threat libraries, data-link encryption, and compatibility with new targeting pods such as the AN/AAQ-33 Sniper and AN/ASQ-228 ATFLIR.
Confirmed operators have included the United States Navy, the Royal Saudi Air Force, and selected NATO and Middle Eastern partners via Foreign Military Sales. Platform integrations have encompassed carrier-based squadrons from Carrier Air Wing Three and land-based tactical units operating from forward operating bases in Central Command areas of responsibility.
SLAM-ER has been used in precision strikes against infrastructure, mobile missile batteries, and high-value nodes during Iraq War operations and counterinsurgency campaigns in Afghanistan. Some missions required in-flight retargeting to avoid collateral damage near population centers, coordinated with Rules of Engagement and battle damage assessment teams. Operational reports mention successful terminal homing against concealed emitters and hardened structures; isolated incidents included seeker wear in degraded weather and data-link interruptions managed through procedural workarounds involving asset coordination such as AWACS and Joint Terminal Attack Controller inputs.
Category:Air-to-surface missiles Category:Weapons of the United States