Update--SpaceX is set to launch from Vandenberg Space Force Base late Thursday morning.

     Launch time will start at 11:36 AM with a 14 minute window to follow.

     If it's scrubbed they'll try again Friday at the same time.

     The payload is a Maxar 1 satellite, the first of what will be at least four new WorldView Legion satellites that will enhance and replace existing satellites that collect pictures and data about the planet's surface.   

     A live webcast of this mission will begin on X @SpaceX about 15 minutes prior to liftoff. Watch live.

     This will be the 20th flight for the Falcon 9 first stage booster supporting this mission, including nine Starlink missions.

     After stage separation, the first stage will land on Landing Zone 4 (LZ-4) at Vandenberg Space Force Base.

     Sonic booms may be heard as it returns to earth to land about eight minutes after launch.