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Mike Curie/NASA Launch Commentator: Good morning,
from Cape Canaveral Air

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Force Station in Florida, you are watching
live coverage of the launch of the SpaceX

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Falcon 9 rocket and Dragon capsule.

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This is Falcon Launch Control at T-minus one
hour, 14 minutes and counting.

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After four previous flights to the International
Space Station, including three official

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resupply missions for NASA, SpaceX is set
to launch its fourth Commercial

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Resupplies Services, or CRS, mission to the
station, which is designated as CRS-4.

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Liftoff is targeted for an instantaneous launch
window at 2:14 a.m. and 38 seconds

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Eastern Time.

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And at the time of launch, the International
Space Station will be flying at an altitude

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of 262 miles over the Arabian Sea, west of
the southern tip of India and Sri Lanka.

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The Dragon spacecraft will be filled with
more than 5,000 pounds of supplies and

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payloads including critical materials to support
the 255 science and research

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investigations that will occur during ISS
Expeditions 41 and 42.

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Dragon will be carrying three powered cargo
payloads in it pressurized section and

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two in it unpressurized trunk.

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The science payloads will enable model organism
research using rodents, fruit flies

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and plants.

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A special science payload is the ISS RapidScat
Scatterometer to monitor ocean

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surface wind speed and direction.

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Several new technology demos aboard will enable
bone density studies, test how a

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small satellite moves and positions itself
in space using new thruster technology,

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and use the first 3D printer in space for
additive manufacturing.

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The mission also will be delivering IMAX cameras
for filming during four station

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increments and replacement batteries for the
spacesuits.

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This is the fourth of 12 missions under the
SpaceX Commercial Resupplies Services

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Contract with NASA.

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Under the contract, SpaceX will deliver a
minimum of 20 metric

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tons of cargo to the station.

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The weather forecast is not exactly ideal,
however a "go" was given to fuel the

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Falcon 9 rocket.

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The launch team is on station.