A SpaceX Falcon 9 rocket launched the Tranche 0 mission for the Space Development Agency (SDA), from Space Launch Complex 4E (SLC-4E) at Vandenberg Space Force Base in California, on 2 April 2023, at 14:29 UTC (07:29 PDT). Following stage separation, Falcon 9’s first stage landed on Landing Zone 4 (LZ-4) at Vandenberg Space Force Base. Falcon 9’s first stage (B1075) previously supported one Starlink mission. According to SDA, “Tranche 0 will comprise 28 satellites: 20 in the Transport Layer for communications and data; and eight in the missile warning/tracking Tracking Layer”.
Credit: SpaceX