January 31st 2013 - 03:35 UTC

T+1h 46m: SPACECRAFT SEPARATION!

January 31st 2013 - 03:30 UTC

T+1h 42m: The vehicle will now coast for about 4 minutes ahead of Spacecraft separation.

January 31st 2013 - 03:30 UTC

T+1h 42m: MECO-2. The Centaur has shut down once again after the short second burn.

January 31st 2013 - 03:29 UTC

T+1h 41m: The second Centaur burn has begun.

January 31st 2013 - 02:48 UTC

T+1h: There are 40 minutes left until the second ignition of Centaur for a short 1 minute burn. Spacecraft separation will occur at around 03:43 UTC.

January 31st 2013 - 02:06 UTC

T+18m: MECO-1 on the Centaur! This coast phase will last 82 minutes before a short 1 minute second burn ahead of Spacecraft separation.

January 31st 2013 - 02:05 UTC

T+17m: Coming up on Centaur shutdown.

January 31st 2013 - 02:02 UTC

T+12m: Everything continues well, 5 minutes remaining in this burn. The vehicle is currently at 14,000mph.

January 31st 2013 - 01:53 UTC

T+5m: The 14 minute Centaur first burn is underway.

January 31st 2013 - 01:52 UTC

T+4m: Full thrust from the Centaur upper stage!

January 31st 2013 - 01:52 UTC

T+4m: MECO. The first stage has cut off on time and separated from the Centaur upper stage.

January 31st 2013 - 01:49 UTC

T+2m: Everything is going well. Passed maximum dynamic pressure.

January 31st 2013 - 01:48 UTC

T-0: LAUNCH! An Atlas V has lifted off from Cape Canaveral carrying the TDRS-K spacecraft.

January 31st 2013 - 01:47 UTC

T-1m: Range green.

January 31st 2013 - 01:44 UTC

T-4m: The countdown has resumed.

January 31st 2013 - 01:42 UTC

T-4m and holding: The Spacecraft is on internal power.

January 31st 2013 - 01:42 UTC

T-4m and holding: Permission has been granted by the launch director to launch. T-0 is set for 01:48 UTC.

January 31st 2013 - 01:36 UTC

T-4m and holding: The team have conducted their polls and everyone is 'GO' for launch in 12 minutes.

January 31st 2013 - 01:25 UTC

T-4m and holding: A weather briefing has increased the chance of green weather to 90%. So far everything continue well, there have been several minor vehicle issues but they have been down to mostly instrumentation.

January 31st 2013 - 01:00 UTC

T-25m 0s: Everything continues well in tonight's countdown, There will be a weather briefing in 20 minutes. Fueling is still occurring with the Atlas first stage liquid oxygen at 90%.

January 31st 2013 - 00:12 UTC

The team have confirmed the fill and drain valves are infact working and have disabled sensors causing the trouble signature.

January 30th 2013 - 23:57 UTC

An anomaly team is convening regarding a fill and drain valve issue on the Atlas V booster.

January 30th 2013 - 23:53 UTC

T- 1h 30m: Liquid oxygen is now being loaded into the Atlas V first stage, The refined kerosene was loaded into the first stage yesterday after rollout.

January 30th 2013 - 23:40 UTC

T- 1h 45m: Fueling of the Centaur upper stage with 4150 gallons of liquid oxygen has begun.

January 30th 2013 - 23:25 UTC

T- 1h 55m: A 'GO' has been given to begin loading the super cold fuel into the Atlas V. The first fuel tank to be filled is the Centaur liquid oxygen which will be followed by the Atlas first stage liquid oxygen. Centaur liquid hydrogen will begin filling at around T-1 Hour and counting.

January 30th 2013 - 23:22 UTC

The launch team are currently polling to begin cryogenic fuelling. The Atlas V first stage uses highly refined kerosene and super cold liquid oxygen whilst the Centaur upper stage uses super cold liquid hydrogen and liquid oxygen.

January 30th 2013 - 23:20 UTC

The latest weather forecast for tonight's launch has 70% odds of being green during the 40 minute launch window.

January 29th 2013 - 15:40 UTC

The vehicle has safely arrived at the pad and is being hooked up to various electrical and air line connectors.

January 29th 2013 - 15:10 UTC

The Atlas V 401 vehicle is currently rolling out to the launch pad at Space Launch Complex 41. The journey should take about 30 minutes.

January 28th 2013 - 18:00 UTC

A GO was given to launch TDRS-K on Thursday 31st at 01:38 UTC, Wednesday 30th at 20:48 local time. Weather predicts a 60 percent chance of launching with the concern being on showers or thunderstorms developing in the area. Rollout to Space Launch Complex 41 will occur at 15:00 UTC, 10:00 Local time tomorrow, Tuesday 29th.

January 20th 2013 - 12:00 UTC

The Tracking and Data Relay satellite, TDRS-K, the very first of the third generation of TDRS satellites was successfully encapsulated in the payload fairing on Wednesday, January 16th. The fairing will protect the satellite during the first stage of launch where friction is highest on the vehicle. The encapsulated satellite is due to be taken out to Space Launch Complex 41 for mate to the vehicle on Sunday, January 20th.