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BAE Systems has completed the preliminary design review for the Epoch 2 missile warning and tracking satellite constellation for the U.S. Space Force. This review confirms that the design meets the necessary requirements.

Under a $1.2 billion contract awarded in May 2025, BAE will develop 10 satellites to operate in medium Earth orbit, enhancing capabilities to detect and track missile launches, including hypersonic threats. The Epoch 2 constellation is part of a broader Resilient Missile Warning Tracking architecture, complementing existing systems.

The satellites will utilize infrared sensors to relay tracking data to defense systems. The initiative is intended to create a layered missile-warning network across various orbital regimes.