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Atlas 5/WorldView 4 launch timeline

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).

T+0:00:01.1: Liftoff
01
The United Launch Alliance Atlas 5 vehicle, designated AV-062, will lift off and begin a vertical rise away from Space Launch Complex 3-East at Vandenberg.

T+0:01:19.1: Mach 1 and Max Q
02
The Atlas rocket achieves Mach 1 some 79 seconds into the flight, then passes through the region of maximum dynamic pressure at 94 seconds.

T+0:04:03.1: Main Engine Cutoff
03
The RD-180 main engine completes its firing after consuming the load of RP-1 kerosene fuel and liquid oxygen supply in the Atlas first stage.

T+0:04:09.1: Stage Separation
04
The Common Core Booster first stage of the Atlas 5 rocket separates from the Centaur upper stage. Over the next few seconds, the Centaur engine liquid hydrogen and liquid oxygen systems are readied for ignition.

T+0:04:19.0: Centaur Ignition No. 1
05
The Centaur RL10C-1 engine ignites for the longer of the two upper stage firings. This burn will inject the Centaur stage and WorldView 4 spacecraft into polar orbit.

T+0:04:27.1: Nose Cone Jettison
06
The two-piece, 14-foot-diameter payload fairing that protected the WorldView 4 spacecraft during the atmospheric ascent is separated to reveal the satellite to space.

T+0:15:36.9: Centaur Engine Cutoff No. 1
07
The Centaur engine shuts down after arriving in the planned sun-synchronous orbit of 379 by 390 miles tilted 97.96 degrees to the equator.

T+0:19:15.9: Spacecraft Separation
08
The high-resolution WorldView 4 imaging satellite is released into orbit from the Centaur upper stage to complete the primary objectives of the AV-062 launch.

T+2:11:45.9: Cubesat Separation
09
Seven tiny Cubesats being launched through a National Reconnaissance Office-sponsored rideshare, called the ENTERPRISE mission, are ejected from carriers mounted near the RL10 engine over a period of 14 minutes. The Centaur then executes another burn to escape Earth and enter solar orbit.

See earlier WorldView 4 coverage.

Our Atlas archive.

Source: You’ll find lots of information about the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Also we have facts about the space station, ISS, SpaceX launch, space program, and outerspace. Space Flight

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Atlas 5/WorldView 4 launch timeline

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