Watch a live view of the Atlas 5 launch pad with countdown audio (members only)

A United Launch Atlas 5 rocket is set to loft three military satellites for the U.S. Air Force on a mission codenamed AFSPC 11. This timeline shows the major mission events planned over a six-hour flight to a near-geostationary orbit.

Launching new Global Positioning System navigation satellites at a rate not seen in 21 years, this year’s fourth such deployment is coming up at midday Wednesday, Oct. 29 by an Atlas 5 rocket from Cape Canaveral.

An Atlas 5 lifts off at dawn creating a spectacular sky show as it races toward orbit carrying the fifth Advanced Extremely High Frequency (AEHF 5) communications satellite for the U.S. Air Force.