1755 GMT (1:55 p.m. EDT)
Fast-filling of the first stage liquid oxygen tank has been completed. Topping mode is now underway.
1753 GMT (1:53 p.m. EDT)
The liquid hydrogen tank in the Centaur upper stage just reached the 97 percent level. Topping is now beginning.
1748 GMT (1:48 p.m. EDT)
The weather odds have increased to 90 percent favorable for an on-time launch of the Atlas 5 rocket today.
Still calling for scattered clouds at 3,000 feet, scattered high
clouds at 25,000 feet, a chance of isolated coastal showers, good
visibility, southeasterly winds of 16 to 20 knots and a temperature
around 79 degrees F.Current information on the launch countdown, this is the 2nd in the series of advanced high frequency communications satellites, set for launch this afternoon aboard an Atlas V, which uses the russian built rd108 rocket engine to loft the satellite into orbit.
Watch live streaming video from spaceflightnow at livestream.com
Live stream of the launch is above...the feed from United Launch Alliance will start around 230 pm this afternoon 1830 UTC/GMT.
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