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249 miles above Earth. NASA has a specialized laser mounted to the International Space Station.

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It's called CATS: The Cloud Aerosol Transport System, and it's designed to study the atmosphere.

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CATS makes observations about the transport of aerosols by looking through vertical slices of the atmosphere.

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CATS data helps scientists improve climate models and monitor near-real-time events on Earth, including pollution, volcanoes, wildfires, and more.

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