SHARE: Pictured is a SpaceX Falcon 9 at Vandenberg Space Force Base, Calif. just before the Wednesday launch of Tranche 1, Transport Layer satellites (SpaceX Photo) The second batch of U.S. Space Force Space Development Agency (SDA) Tranche 1, Transport Layer communications satellites launched on Wednesday from Vandenberg Space Force Base, Calif. A SpaceX Falcon 9 rocket carried the 21 Lockheed Martin [LMT] satellites. Last month, a Falcon 9 launched the first Tranche 1, Transport Layer satellites---21 by York Space Systems--from Vandenberg (Defense Daily, Sept. 10). Space Force and SDA public affairs offices have been on a shoestring since the Oct. 1st federal shutdown, and neither… Subscriber-only content. Please log in below. Email or Username