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The AGM-88J SiAW (Stand-in Attack Weapon) is a tactical air-to-surface missile under development for the United States Air Force (USAF) by Northrop Grumman. It is primarily designed to attack air-defences and high-value targets such as command-and-control sites, surface-to-surface missile launchers, anti-satellite systems, and GPS jamming systems.
== History == In May 2022, the USAF awarded contracts to L3Harris Technologies, Lockheed Martin and Northrop Grumman to begin the first phase of development for the Stand-in Attack Weapon (SiAW). On 28 September 2023, the USAF awarded a US$705 million contract to Northrop Grumman to develop and test the SiAW. The SiAW is intended to attack relocatable targets including theater ballistic missile launchers, cruise and anti-ship missile launchers, GPS jamming platforms and anti-satellite systems. It will have a shorter range than standoff weapons, being fired by an aircraft after penetrating enemy airspace. The SiAW will fit inside the F-35 Lightning II's internal weapon bays. The design leverages work on the United States Navy's AGM-88G Advanced Anti-Radiation Guided Missile – Extended Range (AARGM-ER). The USAF plans to have an operational weapon by 2026. In November 2024, Northrop Grumman delivered the first SiAW to the USAF for flight testing.
== See also == Mako Multi-Mission Hypersonic Missile, Lockheed Martin's offering for the SiAW program
