First, ULA is targeting 7 p.m. to launch the Atlas V — which is outfitted with five solid rocket boosters — and deploy the first production batch of Amazon Project Kuiper broadband satellites into low-Earth orbit. The launch window lasts two hours, until 9 p.m., and the rocket will fly along a northeasterly trajectory.

The Project Kuiper mission will kick off Amazon's full-scale deployment of 3,200-plus satellites delivering high-speed internet around the world.