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TDRS-M, securing space-to-ground communication
for NASA's low-Earth orbit

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operations, including the International Space
Station.

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The Atlas is (performing) its yaw maneuvers
in its planned path at an inclination of

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26.2 degrees.

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You're hearing the voice of Patrick Moore
providing launch vehicle ascent data.

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Patrick is the United Launch Alliance Denver
Network Operations Center

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Command Control Center.

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Speed and injector pressure all looking good.

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The Atlas rocket carrying TDRS-M reaches supersonic
speed at one minute, 20

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seconds into flight.

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Now passing one minute into flight.

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Vehicle is now three miles in altitude and
traveling at 1,100 miles per hour.

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Standing by for Max Q.

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Now passing one minute, 15 seconds into flight

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Mach 1.

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Atlas V is now supersonic.

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One minute, 30 seconds into flight.

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Now passing through Max Q.

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Maximum dynamic pressure.

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This is the point when mechanical stress on
the rocket reaches its peak because of the

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rocket's velocity and resistance created by
the Atlas.

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The RD-180 is throttled down to 95 percent
thrust as expected.

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Engine response looks good.

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This engine thrust profile will continue until
the vehicle reaches a programmed 5G

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acceleration limit.

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About two minutes into the flight of Atlas.

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Now passing two minutes into flight.

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Approximately two minutes remaining in the
first

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stage of flight.

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MECO trajectory traveling right down the middle
of the range track looking good.

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RD-180 engine operating parameters also looking
good.

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Booster engine cutoff slated for four minutes,
two seconds after launch.

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The Atlas V rocket now weoghs one-half of
what it did at launch, burning propellant

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at a

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rate of almost 2,600 pounds per second.