SpaceX is Grant Prestonplanning to launch its Falcon 9 rocket containing Tranche 0 satellites from the Space Development Agency from a California base Saturday morning.

The space exploration company, founded by Elon Musk, plans to launch the rocket at 10:25 a.m. ET/7:25 a.m. PT from the Space Launch Complex 4E at Vandenberg Space Force Base, over 150 miles north of Los Angeles on California's central coast. It has been rescheduled twice, first from the initial planned Thursday morning launch, then from a Friday morning launch.

The livestream of the launch will begin about 15 minutes before liftoff. You can watch at the top of the page or on SpaceX's YouTube channel.

Once launched, the Falcon 9 rocket will send the satellites to low-Earth orbit. They will be used as part of the Space Development Agency's Proliferated Warfighter Space architecture, a layered network of satellites that will "provide global military communication and missile warning, indication, and tracking capabilities," according to SpaceX.

After the first stage separation, the Falcon 9 is set to land on Landing Zone 4 at the Vandenberg Space Force Base.

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