Summary: The U.S. Space Force advances the future of proliferated Resilient Missile Warning and Tracking (MWT) capabilities through the MWT Epoch 2 program’s completion of the preliminary design review for its Medium Earth Orbit (MEO) constellation. The Epoch 2 constellation will expand the resilient capabilities of Epoch 1, creating a more robust design to track missile threats around the world and advancing the global coverage of defense for the Nation, Warfighter, Allies, and partners.
EL SEGUNDO, Calif. – The U.S. Space Force’s Space Systems Command (SSC) System Delta 84 (SYD 84) is rapidly advancing its new line of defense against missile threats, successfully completing a preliminary design review milestone for a next-generation satellite constellation. This effort will ultimately field a ten-satellite constellation in Medium Earth Orbit (MEO), delivering a resilient, space-based capability for missile warning and tracking.
In partnership with BAE Space & Mission Systems, SYD 84’s Missile Warning and Tracking (MWT) Epoch 2 program successfully completed the preliminary design for the Epoch 2 MEO constellation. This milestone marks Epoch 2’s shift into the next phase of system design maturity for the constellation of 10 new satellites, which will elevate the resilient capabilities of the 12 initial Epoch 1 satellites, creating a more robust constellation designed to track missile threats around the world.
"In today's world, speed and innovation are essential to our national defense," said Lt. Col. Brandon Castillo, SYD 84 Epoch 2 system program manager. "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."
Epoch 2 continues to prove its focus on the rapid acquisition of this MEO constellation with the completion of this MWT Epoch 2 milestone. The preliminary design review was achieved only nine months after the contract was awarded in May 2025.
The program's rapid progress is the result of a modern, innovative acquisition approach. By using cutting-edge digital engineering and proven technologies, the combined government and industry team is on track to deliver this vital capability to warfighters faster than traditional methods.
"This milestone was achieved by a talented and dedicated team working in close collaboration," said 1st Lt. Sabrina Taylor, SYD 84 Epoch 2 chief systems engineer. "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."
Space Systems Command is the U.S. Space Force field command responsible for acquiring, developing, and delivering resilient capabilities to outpace emerging threats and protect our Nation’s strategic advantage in, from, and to space. SSC manages a $15.6 billion annual space acquisition budget for the Department of Defense, working with joint forces, industry partners, government agencies, academia, and allied nations. For more information, visit ssc.spaceforce.mil and follow @USSF-SSC on LinkedIn.
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