A SpaceX Falcon 9 will launch a batch of satellites for the Space Development Agency’s (SDA) Tranche 1 Transport Layer. The shorthand for this mission is T1TL-A. This is the fourth out of six missions planned to deploy satellites for the T1TL portion of the SDA’s constellation called the Proliferated Warfighter Space Architecture (PWSA). The satellites being launched were manufactured by Northrop Grumman. The Falcon 9 first stage booster, tail number B1103, launching for a sixth time, will land on the drone ship, ‘Of Course I Still Love You,’ positioned in the Pacific Ocean. Launch attempt aborted Oct. 5 and then delayed from Oct. 6. Click here to watch our live coverage.