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[Music]

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when you fill a glass of water you

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probably don't ponder where the clear

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liquid came from yes it flows from a

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faucet but originally it came from a

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clouds are the mechanism to transport

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water from the oceans and through

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evaporation back into the land and form

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our lakes and rivers and our water

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water evaporates from oceans lakes and

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land the moisture rises then cools to

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form clouds

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when the clouds become heavy with water

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they drop it back to earth as snow or

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most of the satellites that are with the

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earth look at the top of the clouds and

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tell us where the top of the clouds are

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and of course in the bottom of the earth

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we can see the bottom of the class but

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we don't know what's in between

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we're missing the detailed information

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that determines what effect the cloud is

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going to have

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in whether it's going to precipitate

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whether it's going to give us rain

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whether it's going to give us snow

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whether it's going to have a net heating

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effect on the planet or a net cooling

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effect on the planet

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nasa's cloud set will attempt to answer

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these questions from space for the first

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time scientists will be able to see

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clouds in 3d

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this is the first

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time we will see snowfall from space

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we will know for the very first time

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globally what percentage of clouds

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produce rain

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we will know for the very first time

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how much water how much ice is locked up

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in clouds

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clouds that will share its right into

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orbit with another nasa satellite the

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cloud aerosol lidar and infrared

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pathfinder satellite observations known

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as calypso once in space the two will

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hop aboard the a-train

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well the a-train is a set of satellites

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that will follow each other in orbit and

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take data

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the a train will provide the most

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comprehensive observations of earth's

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atmosphere ever obtained and cloudsat

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will do its part to watch over one of

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our most precious resources

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everyone in the world is worried about

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oil right now right we don't have enough

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oil the oil supply is going to run out

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what about our water supply

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so the next time you pour yourself a

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glass of water remember

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the water that you have in a glass of

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water in front of you