U.S. Department of Defense - Missile Defense Agency

U.S. Department of Defense - Missile Defense Agency

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LRDR Overview


The Long Range Discrimination Radar (LRDR) is a search, track and discrimination radar. Once operational, LRDR will be a component of the United States layered Missile Defense System (MDS) with the primary mission to provide continuous and precise tracking and discrimination of missile threats to the United States (U.S.). Discrimination is a critical capability of missile defense, which will provide data to distinguish lethal objects from debris and decoys around the lethal object. The LRDR will be integrated into the MDS command and control system and will assist with assessing incoming threats to more efficiently activate MDS weapons to intercept such threats.

In 2014 and 2016, the U.S. Congress directed the Missile Defense Agency (MDA) to design, develop, integrate, deliver, field, and sustain LRDR to protect the U.S. homeland against long-range ballistic missile threats. MDA selected Clear Air Force Station (CAFS), Alaska as the location for the LRDR in 2016, after completing an Environmental Assessment (EA) and Finding of No Significant Impact (FONSI).

The LRDR site will include the S-band radar and associated support facilities and infrastructure. The radar is housed in a five-story building that contains two 60 foot diameter radar array antennas.

Since completion of the 2016 EA and FONSI and the siting decision, the operational concept for the LRDR has changed due to emerging threats to the U.S. These changes in operational concept drive the requirement for additional restricted airspace to perform the LRDR critical national defense mission.

LRDR Fact Sheet


About MDA

The MDA is a research, development, and acquisition agency within the Department of Defense that works closely with the combatant commands to develop, test, and field defensive systems to protect the U.S., our forward deployed forces, and our friends and allies from missile attack. For more information about MDA