L3Harris, Sierra Space to build 36 satellites to expand U.S. missile-tracking network

The Space Development Agency has issued awards to construct 36 Accelerated Missile Defense Tracking Layer satellites for Tranche 3. This initiative is designed to support the 'Golden Dome for America' program. According to official statements from sda.mil and reporting from SpaceNews, the contract is split between two primary aerospace firms. L3Harris has been tasked with supplying 18 of these satellites, while Sierra Space is also involved in the build of the 36-satellite network to expand the existing U.S. missile-tracking capabilities. Financial details of the agreements have been highlighted across several business and defense outlets.

Reuters reports that L3Harris received a contract valued at $955 million to supply its portion of the missile shield. Separately, The Denver Post reports that Colorado-based Sierra Space has landed a pivotal defense contract worth $798 million. Other coverage from Air & Space Forces Magazine and Seeking Alpha confirms that these awards are specifically for the Tranche 3 layer of the missile defense architecture, emphasizing the scale of the investment in satellite-based tracking. Context provided by Interesting Engineering indicates that the U.S. Space Force is turning to these satellite systems specifically to track hypersonic missiles.

The 'Golden Dome' project represents a strategic effort to enhance the tracking and detection of high-speed threats through the deployment of the Accelerated Missile Defense Tracking Layer. The involvement of multiple contractors and the specific division of the 36 satellites suggests a phased approach to expanding the national missile shield's orbital coverage and detection accuracy. Future developments will center on the production and deployment of these Tranche 3 satellites. Based on the provided coverage, the next steps involve the manufacturing process led by L3Harris and Sierra Space to fulfill their respective contract obligations. Observers will likely monitor the integration of these 36 new units into the broader missile-tracking network to determine how they improve the Space Force's ability to monitor hypersonic trajectories as part of the Golden Dome for America initiative.