SpaceX SDA's TRANCHE 1 TRANSPORT MISSION
October 15, 2025

SpaceX is targeting Wednesday, October 15 at 4:03 p.m. PT for a Falcon 9 launch of the Space Development Agency’s (SDA) Tranche 1 data transport mission to low-Earth orbit from Space Launch Complex 4 East (SLC-4E) at Vandenberg Space Force Base in California.

This is the second of ten Tranche 1 missions Falcon 9 will launch on behalf of the SDA.

A live webcast of this mission will begin about 10 minutes prior to liftoff, which you can watch here and on X @SpaceX. You can also watch the webcast on the X TV app.

This will be the seventh flight for the first stage booster supporting this mission, which previously launched SDA T1TL-B Tranche 1 and five Starlink missions.

Following stage separation, the first stage will land on the Of Course I Still Love You droneship, which will be stationed in the Pacific Ocean.

The space vehicles launched during this mission will provide data transport as a part of SDA’s Proliferated Warfighter Space Architecture, a new layered network of satellites in low-Earth orbit and supporting elements that will provide global military tactical communication and missile warning, indication, and tracking capabilities.

There is the possibility that residents of Santa Barbara, San Luis Obispo, and Ventura counties may hear one or more sonic booms during the launch, but what residents experience will depend on weather and other conditions.