Over-the-Horizon Backscatter Radar

The Over-the-Horizon Backscatter Radar program is designed to enhance the United States Air Force's ability to detect airborne and surface targets over long distances. This initiative focuses on developing, testing, and deploying high-frequency ionospheric backscatter radar systems. These systems are capable of detecting and tracking targets across wide geographic areas, addressing the limitations of conventional radar systems caused by the Earth's curvature.

The program includes efforts such as the Tactical Multi-Mission Over the Horizon Radar (TACMOR) and Homeland Defense Over the Horizon Radar (HLD-OTHR). Specific deployments are planned in strategic locations like the Republic of Palau. TACMOR aims to improve Air Domain Awareness within the USINDOPACOM area by addressing surveillance coverage gaps in key Pacific regions. It provides critical data for real-time operations and post-event analysis through a system that includes a transmit site with high-power amplifiers and a receive site with dual-monopole antenna elements.

HLD-OTHR focuses on extending North Warning System surveillance capabilities for North America, particularly against potential air and cruise missile threats. This involves developing advanced radar systems with enhanced transmit power and receiver sensitivity. The project will integrate its data into existing defense networks to support air and cruise missile defense missions, with plans for multiple radar installations and an Operational Control Center for managing sensor data fusion.

Both TACMOR and HLD-OTHR projects are managed by PEO Digital using an evolutionary capability development approach. They aim to deliver multiple radar systems incrementally, leveraging international collaborations when applicable. These initiatives are vital for maintaining comprehensive surveillance coverage and enhancing national security through improved detection capabilities against emerging threats.