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George Diller, NASA Launch Commentator: Green
board.

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T minus 10

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9

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8

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7

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6

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5

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4

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3

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2

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Engine start

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1

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zero

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And liftoff of the Delta 2 rocket with OCO-2

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Tracking of greenhouse gas in seek of clues
to climate change

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Voice of Steve Agid, Flight Commentator: (inaudible)
checking pressure in both verniers

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The chamber pressure and the three solids�good
symmetrical burn

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Twenty-two seconds in�.still looking good

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The two deck coming up on one mile

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Range distance seven point three nautical
miles

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Velocity 959 miles per hour

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Past mach one

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Fifty seconds in, maximum dynamic pressure

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Standing by for the solids dropping in chamber
pressure

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And we have burn out of the three solids

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We'll be holding onto those solids for about
40 seconds to assure a safe water impact

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point.

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One minute, seven seconds into the flight,
altitude now seven point two nautical miles,

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downrange distance ten nautical miles, velocity
991 miles per hour.

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One minute, seventeen seconds in.

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About 15 seconds now until we expect those
three solid boosters to separate from the

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vehicle, as we're approaching the one minute,
thirty second mark.