SDA's Fourth Tranche 1 Mission

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[snip] A live webcast of this mission will begin about 10 minutes prior to liftoff, which you can watch here and on X @SpaceX.

This will be the sixth flight for the first stage booster supporting this mission, which previously launched NROL-179, SDA-T1TL-E, and three Starlink missions. Following stage separation, the first stage will land on Landing Zone 4 (LZ-4) at Vandenberg Space Force Base.

The space vehicles launched during this mission will provide data transport as part of the SDA's Proliferated Warfighter Space Architecture, a mesh network of optically connected satellites in low-Earth orbit that enable global military tactical communications and missile warning, indication, and tracking capabilities. Falcon 9 will deliver 21 data transport satellites comprising the fourth orbital plane in the SDA's proliferated LEO architecture.

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. [/snip]

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