The THAAD Ground-Based Radar (GBR), now known as the AN/TPY-2, is an X-Band, phased array, solid-state, long-range air defense radar. It was developed and built by Raytheon at its Andover, MA Integrated Air Defense Facility, as the main radar for the US Army’s THAAD late midcourse ballistic missile defense system.
For THAAD, targeting information from the TPY-2 is uploaded to the missile immediately before launch, and continuously updated in flight via datalinks. The TPY-2 is always deployed with THAAD, but it can also be used independently as part of any ABM (anti ballistic missile) infrastructure. That flexibility, and ease of deployment, is carving out an expanding role for the TPY-2/ “FBX” that reaches beyond THAAD. If a recent NRC report is adopted, that role will expand again to include national-scale ballistic missile defense. Hence this separate article to cover its ongoing development.