U.S. Space Force plans next missile-warning satellites in medium orbit

The US Space Force is seeking industry information on the next two phases, Epochs 3 and 4, of its Resilient Missile Warning and Tracking constellation in medium Earth orbit. The prospective satellites and ground infrastructure would extend a multilayer architecture for detecting missile launches and maintaining tracks during flight, complementing sensors in other orbital regimes. Earlier Epoch 2 work has advanced through design reviews, while the latest request examines production feasibility, technical approaches and acquisition planning for later capability increments. The activity is market research for future procurement, not an awarded production contract or a newly launched satellite batch.