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Back in April of 

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2021, there was a volcano in St.

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Vincent Island in the Caribbean. 

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The image that that we did capture,
 it's the backscatter along a track

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that is probably
 a thousand kilometers or so long.

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The volcanic ash
 that ICESat-2 saw is encircled.

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You can see that it's a very faint
 kind of ghostly signal.

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The volcanoes to say it was about 200

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or so kilometers
 to the west of where that track was.

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But in that image, you can see
 the ash has gotten up to

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I think it was about 10 kilometers
 or so, maybe 12.

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The importance of these type
 of measurements are really for aviation

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because we're able to get
 the vertical distribution of the plume,

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which other passive satellites cannot do.

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And so, you know, we can tell the FAA
 that in this area, you know, at this

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altitude, there are volcanic ash,

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and it's very important
 for commercial aviation

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to avoid these things because they can
 impact the aircraft engines.