Ground Based Midcourse

The Ground Based Midcourse (GMD) Program, managed by the Missile Defense Agency (MDA), is a critical segment of the United States' layered missile defense architecture. Its primary goal is to provide continuous, 24/7 protection of the U.S. homeland against long-range ballistic missile threats. The GMD Weapon System integrates missile defense sensors from across the globe and consists of a fleet of Ground Based Interceptors (GBIs), Next Generation Interceptors (NGIs), and supporting ground systems. The program supplies combatant commands, including U.S. Northern Command, with the capability to detect, track, and intercept incoming missile threats during the midcourse phase of flight.

The Ground Based Interceptors (GBIs) line item focuses on the procurement and deployment of interceptors designed to physically destroy incoming ballistic missiles outside the atmosphere. The objective is to maintain and enhance the fleet of interceptors, ensuring readiness and reliability. No new procurement is planned for FY 2026, reflecting a shift in focus to upgrades and integration with future NGIs, as well as alignment with revised requirements under MDA Increment 10.

The Silo Interface Vaults/Silos line item addresses the infrastructure necessary to house and launch GBIs and future NGIs. The goal is to provide secure, reliable, and resilient silos capable of supporting current and next-generation interceptors. These silos are essential for maintaining the operational availability and survivability of the GMD system, ensuring that interceptors can be launched rapidly in response to threats.

The Phased Array In-Flight Interceptor Communications System Data Terminal (IDT) and Upgrades line item is focused on enhancing the communication link between GMD Fire Control and in-flight interceptors. Specific objectives include retrofitting existing IDTs with advanced phased array technology, procuring operational spares, and mitigating obsolescence at operational sites. These upgrades are not new end items but modification kits that enable advanced communications and continuous data exchange required for NGI integration and improved situational awareness for warfighters.

Procurement for Boost Vehicles and Launch Support Systems in prior years was aimed at ensuring the reliable launch of interceptors. Boost vehicles and launch support systems are essential hardware components for the GMD system. These components are necessary for the initial boost phase of interceptor flight, supporting the overall effectiveness and reliability of the GMD system.

The Program Objectives and Justification for all these line items are centered on maintaining and modernizing the GMD system to address emerging threats, particularly from the Indo-Pacific region. The upgrades to IDTs and procurement of operational spares are justified by the need to minimize operational downtime and maintain warfighter readiness. Infrastructure investments in silos and vaults ensure the system's resilience and ability to support future interceptor technologies. The delay in procurement for FY 2026 is due to revised requirements under MDA Increment 10, reflecting a strategic shift toward integrating NGIs and advanced communications capabilities.