U.S. Department of Defense - Missile Defense Agency

U.S. Department of Defense - Missile Defense Agency

Site Map

Homeland Defense Radar - Hawaii


About HDR-H


The Missile Defense Agency (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 United States, our forward deployed forces, and our friends and allies from ballistic missile attack. MDA priorities are to increase the Missile Defense System’s (MDS) reliability to build warfighter confidence, increase defensive engagement capability and capacity and address the advanced threat.

The MDS currently provides persistent missile defense of Hawai'i through the existing sensor network, Command, Control Battle Management and Communications, and the Ground-based Midcourse Defense system against current threats. The threat is evolving and BMDS must evolve as well. Adversaries are fielding diverse and expansive ranges of modern offensive missile systems. Since 2017, North Korea completed several test of ballistic missiles with ranges deemed capable of reaching Hawai'i. Once built, the Homeland Defense Radar - Hawaii (HDR-H) will provide enhanced capability and efficiency to the MDS against such emerging threats.

The current ground-based interceptors in Alaska and California provide the capability necessary to defend the U.S. homeland, including Hawai'i, against current threats. The HDR-H, in combination with other sensors, would further enhance the ability for the warfighter to track long-range potential threats to the homeland. The HDR-H would also optimize missile tracking and discrimination capability in the Pacific and would increase the ability of the ground-based interceptors to defend Hawai'i.

The National Defense Authorization Act (NDAA) Fiscal Year (FY) 2017 requires MDA to develop a plan to procure a discrimination radar, or equivalent sensor, for a location that will improve homeland missile defense for the defense of Hawai‘i. A “discrimination radar” is capable of identifying and classifying specific missile threats. The NDAA FY 2021 authorizes MDA to continue HDR-H radar development and siting efforts. The FY 2021 Appropriation bill provided funding to continue these efforts in FY 2021. Therefore, MDA is engaged in Advanced Planning studies and preparing an Environmental Impact Statement for the siting and development of the HDR-H, should a deployment decision be made and is funded.