US Space Force clears design milestone, advances missile-warning constellation

The U. S. Space Force has cleared a major design hurdle in its Resilient Missile Warning and Tracking program, completing the preliminary design review for the 10-satellite Epoch 2 medium Earth orbit constellation.

Space Systems Command awarded BAE Systems Space and Mission Systems a $1.2 billion firm-fixed-price other transaction authority contract for Epoch 2 in May 2025, the command said. First delivery is planned for fiscal year 2029, according to Space Systems Command.

Space Systems Command announced Sunday that System Delta 84, working with prime contractor BAE Systems Space and Mission Systems, achieved the milestone nine months after the contract award. The critical design review is scheduled for this summer.