Posted: Sat, Oct 18, 2025, 11:12 AM ET (1512 GMT)
SpaceX launched a second set of Space Development Agency satellites Wednesday. A Falcon 9 lifted off from Vandenberg Space Force Base in California at 7:06 p.m. Eastern and placed 21 Transport Layer Tranche 1 satellites built by Lockheed Martin into orbit. This is the second set of Transport Layer Tranche 1 satellites to launch after the first set launched a month ago. The Tranche 1 constellation will feature 10 planes of satellites, six for Transport Layer communications and four for Tracking Layer missile tracking applications.

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