A rocket standing 19 stories tall is ready to roar to life and boost a top-secret satellite into orbit from Vandenberg Air Force Base.
On Thursday at 2:39 p.m. PDT, United Launch Alliance's Atlas 5 rocket is set to launch a national security payload and cluster of miniature satellites.
There will be live launch coverage on United Launch Alliance's website, which will begin at 2:19 p.m.
The mission has been delayed six weeks because of a nagging glitch with equipment on the base northwest of Santa Barbara. But the glitch has been fixed, and the weather and rocket are "go" for launch.
"We are looking good from a launch vehicle prospective," Maj. Joseph Howerton, Air Force squadron flight commander, said in a statement . "This is one of the cleanest launch vehicles we have seen for Atlas; we have not seen any major issues."