The U.S. Space Force has successfully completed the preliminary design review for the missile warning and tracking Epoch 2 program.
The U.S. Space Force’s Space Systems Command has successfully completed the Preliminary Design Review for the Missile Warning and Tracking Epoch 2 program. Epoch 2 constellation will consist of 10 new satellites positioned in Medium Earth Orbit for missile warning and tracking .
This space-based network will provide global surveillance to detect missile threats, strengthening the defensive shield for the United States, its military personnel, and its international partners.“In today’s world, speed and innovation are essential to our national defense,” said Lt. Col. Brandon Castillo, System Delta 84 Epoch 2 system program manager, on March 9. “Our team is delivering to outpace the threat. This expanded constellation will provide the global coverage needed to protect our Nation, service members, Allies, and partners from the most advanced missiles,” Lt. Col. Castillo added. Innovation at digital speedWhile many focus on the hundreds of small satellites in Low Earth Orbit or Geosynchronous Orbit , the Space Force is placing its bet on the middle ground. Medium Earth Orbit is the favourable zone between 10,000 and 20,000 kilometers above the planet. It is high enough to see vast swaths of the Earth at once, but close enough to track the dimmer heat signatures of maneuvering hypersonic missiles.The Epoch 2 constellation will eventually join forces with the 12 satellites of Epoch 1. Together, these will create a “proliferated” mesh like a web of eyes so dense that no single anti-satellite weapon can blind the entire system.Working with US-based BAE Space & Mission Systems, the Space Force has officially verified that the Epoch 2 design works on paper. This validation ensures the project is mature enough to move from the conceptual stage into the final, detailed design.The announcement also shows the fast-paced development of space-based tech. Interestingly, the team cleared this design hurdle just nine months after the $1.2 billion contract was awarded in May 2025.Digital engineering and proven technologies were used to ensure design maturity and technical excellence.“Using advanced digital tools allowed us to ensure the design is sound and ready for the next phase, which is the Critical Design Review planned for this summer. Collectively, we are demonstrating we can move quickly while maintaining technical excellence,” said 1st Lt. Sabrina Taylor, SYD 84 Epoch 2 chief systems engineer. The critical design review will give the final green light to a 10-satellite fleet designed to address blind spots in America’s aging missile defense.Strengthening the layersEpoch 2 solves the problem of unpredictable missile paths by using high-tech heat sensors and laser communication.Reportedly, the first delivery of the satellites is expected in fiscal year 2029.The foundational Epoch 1 fleet was designed by Boeing’s Millennium Space Systems, with the first wave of satellites slated to reach orbit by the end of 2026.Altogether, the constellation will serve as a major upgrade to the national missile defense net, weaving into a multi-layered architecture designed for maximum resilience. It will close existing surveillance gaps and provide the tracking necessary to intercept the world’s most elusive threats, specifically targeting the unpredictable, high-speed flight paths of modern maneuvering hypersonic missiles.SpaceNews reported that the ultimate goal is a layered shield of satellites at three different heights in space: low, medium, and high. Collectively, the satellites will work as a team to ensure no missile threat goes unseen.
Military Epoch2 Hypersonic Missile Medium Earth Orbit Missile Warning And Tracking Preliminary Design Review Space US Space Force
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