Sierra Space has completed the first nine satellite structures for the Space Development Agency’s (SDA) Tranche 2 Tracking Layer (T2TRK) program, achieving this initial milestone three months early. The company is under contract to deliver 18 satellites in two orbital planes, known as Plane 1 and Plane 2.
This accelerated delivery validates Sierra Space’s investment in its high-rate manufacturing facility, Victory Works. The achievement moves the critical missile-tracking program forward, ensuring it remains on track for eventual launch and deployment.
“Transitioning from a successful Critical Design Review to completing Plane 1 structures ahead of schedule proves our scalable infrastructure is working,” said Erik Daehler, Senior Vice President of Sierra Space Defense. “Our team is now focused on the next phase for Plane 1: assembly, integration, and testing (AI&T). Simultaneously, we are beginning production on the satellite structures for Plane 2.”
The upcoming AI&T phase involves integrating components, subsystems, and advanced infrared payloads, followed by rigorous testing to verify the satellites’ readiness for space. These satellites are designed to detect and track advanced missile threats, including ballistic and hypersonic missiles.
“Every phase is essential to mission success,” Daehler added. “We believe Tranche 2 will provide unmatched tracking capabilities for SDA and its partners.”
Building on this progress, Sierra Space is already preparing for future needs. “This mission demands continuous evolution,” stated John Wagner, Vice President of Strategy and Business Development. “We are scaling production and advancing our sensor technologies, including next-generation fire-control quality sensors for missile defense.”
The Tranche 2 Tracking Layer will eventually consist of 54 satellites, enhancing global missile warning and tracking. These satellites will integrate with a broader low-Earth orbit communications network, forming a resilient constellation critical for national security. Sierra Space’s performance on this program demonstrates its ability to combine commercial agility with deep defense expertise to meet urgent national security priorities.
