Live coverage: Delta 2 launches

This is the ascent timeline to be followed by the Atlas 5 rocket’s ascent into orbit from Vandenberg Air Force Base in California with the commercial WorldView 4 Earth-imaging satellite for DigitalGlobe. Launch is scheduled for Friday at 11:30 a.m. local time (2:30 p.m. EDT; 1830 GMT).

Beginning the National Reconnaissance Office’s campaign of four launches in 2016 using boosters big and small to deploy a varied collection of new intelligence satellites, a Delta 4 rocket stands ready for liftoff before sun-up Wednesday from California.

Two weeks after a launch pad fire forced a delay, a Japanese H-2B rocket lifted off Tuesday with an HTV cargo freighter to deliver upgraded batteries, experiments and provisions to the International Space Station. Liftoff from the Tanegashima Space Center occurred at 1605 GMT (12:05 p.m. EDT) Tuesday.