Vandenberg Space Force Base Guardians and Airmen are scheduled to support the launch of a second Space Development Agency’s (SDA) Tranche 1 mission Tuesday afternoon from Space Launch Complex 4 East at Vandenberg.

The mission is targeted for liftoff at 4:12 p.m. aboard a SpaceX Falcon 9 rocket. If needed, a backup opportunity is available Wednesday at 4:03 p.m., according to SpaceX .

The launch will carry an additional 21 satellites into orbit are part of the Proliferated Warfighter Space Architecture, a mesh network designed to deliver tactical data to forces in the field, track advanced missile threats and support beyond-line-of-sight targeting.

The first successful mission of its kind, launched September 10 from Vandenberg.

According to base officials, areas nearby to Vandenberg

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