LOUISVILLE, Colo. – Sierra Space announced it has completed the first nine satellite structures for the Space Development Agency’s (SDA) critical Tranche 2 Tracking Layer (T2TRK) program, delivering this initial batch three months ahead of schedule. This marks a major step in the company’s contract to build 18 satellites for the missile-tracking constellation.
The completed structures represent “Plane 1” of the two-plane order. This early achievement validates Sierra Space’s investment in its high-rate manufacturing facility, Victory Works, which was established specifically to meet the demanding pace of national security space programs.
“Completing Plane 1’s structures three months early is a powerful testament to our scalable infrastructure and team’s commitment,” said Erik Daehler, Senior Vice President of Sierra Space Defense. “We are now energized to move into the next phase for these satellites while simultaneously starting production on Plane 2.”
The program now transitions to the crucial assembly, integration, and testing (AI&T) phase for Plane 1. During AI&T, advanced infrared sensors and other subsystems will be integrated into the satellite structures and subjected to rigorous testing to ensure they will perform in the harsh environment of space.
The T2TRK satellites are designed to detect and track advanced missile threats, including ballistic and hypersonic missiles. This early progress helps keep the vital program on track for timely launch and deployment.
“Every phase is essential to mission success,” Daehler added. “We believe the Tranche 2 Tracking Layer will provide unmatched tracking capabilities, and we remain focused on meeting each milestone with precision.”
Building on this momentum, Sierra Space is already preparing for future demands. “This mission is too important to not evolve,” said John Wagner, Vice President of Strategy and Business Development. “We are scaling our production and advancing our detection technologies, including next-generation fire-control sensors, to support the Department of Defense’s evolving needs.”
The broader Tranche 2 Tracking Layer will eventually consist of 54 satellites, building out a resilient global constellation in low-Earth orbit. These satellites will work in concert with SDA’s Transport Layer communications satellites to provide integrated, advanced missile warning and tracking for global security.
With over 30 years of spaceflight heritage, Sierra Space combines commercial agility with deep defense expertise to deliver resilient mission systems for national security.
