The Missile Defense Agency’s Ground-Based Midcourse Defense System (GMD) is a key element of the Ballistic Missile Defense System. The GMD employs integrated communications networks, fire control systems, globally deployed sensors, and Ground-Based Interceptors (GBIs) that are capable of detecting, tracking and destroying ballistic missile threats. The Ground-based Midcourse Defense (GMD) element of the Ballistic Missile Defense System provides Combatant Commanders the capability to engage and destroy intermediate- and long-range ballistic missile threats in space to protect the United States.
Aerojet Rocketdyne supplies the liquid propellant Divert and Attitude Control System (DACS) that maneuvers the Raytheon-built EKV with the precision needed (often referred to as a “bullet hitting a bullet”) to successfully impact and destroy missile threats.
Alternate Propellant Tank (APT): Next generation design propellant tank for the EKV used on the GBI. This design update addressed producibility, material obsolescence, and cost related to the incumbent design.
Alternate Divert Thruster (ADT): Next generation divert thruster (main propulsion) for EKV used on the GBI. This design update addressed a platform stability and reliability concern as well as cost.
The GBI is a multi-stage, solid fuel booster with an Exoatmospheric Kill Vehicle (EKV) payload that uses hit-to-kill technology to destroy incoming intermediate- and long-range ballistic missile threats against the United States and its allies.
A Redesigned Kill Vehicle (RKV) is currently in development. Features include a modular design and improved cost, producibility, testability, maintainability, survivability, and reliability.
GBIs are currently deployed at Fort Greely, Alaska, and Vandenberg Air Force Base, California. A total of 44 interceptors have been emplaced.
- Ground-based Midcourse Defense (GMD) Program Overview, an MDA publication
- Ground-based Midcourse Defense (GMD) page from MDA Website
- May 30, 2017 - Aerojet Rocketdyne's EKV DACS Performs Critical Role in 10th Successful Intercept Test for GMD
- Jan 28, 2016 - Aerojet Rocketdyne's EKV DACS Performs in Successful Missile Defense Flight Test
- June 22, 2014 - Aerojet Rocketdyne’s EKV DACS Performs in Successful GMD Interceptor Test
- Jan. 27, 2013 - Aerojet's DACS Powers Successful Enhanced EKV in Non-Intercept Flight Test