Mission Updates: Atlas V – AEHF-2

The fourth United Launch Alliance launch of the year, an Atlas V531 launched the United States Air Force’s Advanced Extremely High Frequency-2 satellite. Launch was scrubbed May 3rd due to an overtemp warning in the Centaur interstage purge however the next day lift off occurred on time May 4th at 18:42 UTC from Space Launch Complex 41 at Cape Canaveral in Florida.

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May 4th, 18:42 UTC
Successful Launch

May 4th 2012 – 19:30 UTC

After a over 50 minute mission the Centaur and AEHF-2 spacecraft have separated! Another mission success for ULA and the Atlas V vehicle.

May 4th 2012 – 19:10 UTC

And MECO-2 of the Centaur upper-stage, The vehicle will now remain in a 24 minute coast phase before spacecraft separation.

May 4th 2012 – 19:04 UTC

And ignition of the Centaur for a second time! This burn will last just over 5 minutes.

May 4th 2012 – 19:03 UTC

The Centaur is pressurising ahead of it’s second burn.

May 4th 2012 – 18:56 UTC

The Centaur has cut off on time after it’s first burn.

May 4th 2012 – 18:47 UTC

The first stage has separated and the Centaur upper-stage is at full power.

May 4th 2012 – 18:42 UTC

Lift off of an Atlas V with AEHF-2 for the United States Air Force from Cape Canaveral in Florida!

May 4th 2012 – 18:36 UTC

Todays launch has been given the GO to launch and the clock will pick up at 18:38 UTC at T-4m.

May 4th 2012 – 18:24 UTC

Todays launch weather is at 70% ‘GO’ as we approach a launch at 18:42 UTC.

May 3rd 2012 – 19:26 UTC

The launch attempt has been scrubbed. The next launch attempt is tomorrow at 18:42 UTC. This was due to the team being unable to correct the heater overtemp issue on the Centaur upperstage purge in the interstage.

May 3rd 2012 – 19:19 UTC

Anomaly team still discussing options for today, no conclusion yet, however all it isn’t looking favourable for a launch today.

May 3rd 2012 – 18:42 UTC

The team are saying the only chance for a launch would be to check the configuration of some valve on the launch pad. They are currently coming up with a plan to see what equipment and personnel are required to re-enter the pad.

May 3rd 2012 – 18:39 UTC

The anomaly team is working an issue with an interstage purge for the Centaur upper-stage, They have requested that the launch countdown do not come out of the current hold. The hold can be extended as needed in this 2 hour launch window.

May 3rd 2012 – 18:28 UTC

Launch at 18:46 UTC is on track today as weather improves to 90%.

May 2nd 2012 – 16:30 UTC

The Atlas V vehicle with AEHF-2 atop was rolled out to Space Launch Complex 41 today at Cape Canaveral.

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