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PEO Missiles and Space 

Acquisition Category: ACAT I 

Acquisition Lifecycle Phase: Production & Deployment, Operations & Support 



The Phased Array Tracking Radar to Intercept of Target (PATRIOT) Missile protects ground forces and critical assets at all echelons from advanced aircraft, cruise missiles, and tactical ballistic missiles (TBM). The PATRIOT Advanced Capability – 3 (PAC-3) is the Army’s premier guided air and missile defense (AMD) system providing highly reactive hit-to-kill capability in both range and altitude while operating in all environments.

The combat element of the PATRIOT system is the fire unit, primarily consisting of a radar set (RS), engagement control station (ECS), and launching stations (LS). The RS provides airspace surveillance, target detection, discrimination, identification, classification, simultaneous tracking of targets, missile guidance, and engagement support. The LS performs transport and missile launch functions and is remotely operated from the ECS, which provides command and control. The LS has a load-out capacity of four legacy PAC-2 interceptors, 16 PAC-3 Cost Reduction Initiative (CRI) interceptors, or 12 PAC-3 Missile Segment Enhancement (MSE) interceptors depending on configuration. The PAC-3 missile, initially fielded in 2001, introduced hit-to-kill technology for greater lethality against TBM, cruise missiles, and aircraft. The combination of a highly responsive airframe and attitude control motors generates an angle-of-attack that would not be achievable with actuator-driven aerodynamic control surfaces alone.

The PAC-3 MSE, fielded in 2015 provides expanded battlespace performance against evolving threats. The PAC-3 MSE improves upon the original PAC-3 capability with a higher performance dual-pulse solid rocket motor, modified lethality enhancer, more responsive control surfaces, upgraded guidance software, and insensitive munitions improvements.

PAC-3 milestone authority was assigned to the Army in 2004. The Army Acquisition Executive is the Milestone Decision Authority for the PAC-3 and PAC-3 MSE programs. The Army continues to modernize PATRIOT through phased efforts to maintain and improve system capabilities in the complex threat environment. This modernization provides greater resilience against advanced threats and leverages the enlarged engagement area afforded by the PAC-3 MSE interceptor. PATRIOT is transitioning to the Integrated Air and Missile Defense Battle Command System networked architecture.


PATRIOT is a combat-proven ground-based AMD system that is providing critical AMD protection to the warfighter in 17 countries. A total of 16 partner nations have acquired or deployed the PATRIOT System in support of their AMD requirements.


  • Advanced multifunction radar
  • Engagement control operations
  • Launcher capable of remote operations
  • Deployed by fire units organized within a battalion
  • Supported by ancillary communications and maintenance ground support equipment
  • Designed to defend against current and emerging threats


  • 1QFY18: PAC-3 MSE Initial Operational Test &Evaluation
  • FY18: Post-Deployment Build-8 Fielding and Hardware Upgrades (Radar Digital Processor)
  • 3QFY18: PAC-3 MSE Full Rate Production Army System Acquisition Review Council


  • FY21–FY25:
    • PAC-3 MSE capability integration within the Integrated Air and Missile Defense Battle Command System network architecture
    • Execute PAC-3 MSE transition to increased Full Rate Production
    • PAC-3 MSE production to meet increased United States/Foreign Military Sales (US/FMS) demand
    • FMS Production/Sustainment of PAC-3 CRI
    • FMS Production/Sustainment of PAC-2 interceptors
    • S./FMS Production/Sustainment of M901/2/3 LS



Bahrain, Germany, Japan, Korea, Kuwait, Netherlands, Poland, Qatar, Romania, Saudi Arabia, Sweden, Taiwan, and United Arab Emirates
PAC-2 only:  Greece, Israel, and Spain


Lockheed Martin (Dallas, TX)
Missile Assembly: Lockheed Martin (Camden, AR)
System Integration/Ground Equipment: Raytheon (Andover, MA)