Live coverage: Atlas 5 countdown and launch journal

This is the launch timeline to be followed by the Atlas 5 rocket’s ascent into orbit from Cape Canaveral with the SBIRS GEO Flight 3 satellite for U.S. military infrared reconnaissance. Launch is scheduled for Thursday at 7:46 p.m. EST (0046 GMT).

Stormy weather at the Kennedy Space Center forced SpaceX to scrub the liftoff of a Falcon Heavy rocket Thursday night carrying the ViaSat 3 Americas broadband satellite to a near-geostationary orbit.

Engineers scrambled to keep NASA’s billion-dollar asteroid-bound OSIRIS-REx spacecraft on track for its launch last week in the aftermath of an explosion a mile away at SpaceX’s launch pad at Cape Canaveral.