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Launched #20YearsAgo today, ICESat's laser altimeters measured the thickness of the Antarctica and Greenland ice sheets for 7 years. Its measurements, along with ICESat-2's, showed that from 2003–2019, Greenland lost ~200 gigatons of ice per year.

More: https://go.nasa.gov/3IDlG21
#NASAhistory

Earth's Cryosphere Is Vital for Everyone. Here's How NASA Keeps Track of Its Changes.

Due to ice's important role in the Earth system, NASA is committed to studying it extensively.
NASA Sea Level Change Portal
#NASAhistory #20yearsago
in reply to NASA

Ralph Brooker
Ralph Brooker
• •
I knew someone’d find a use for those long Lego flat bits.
in reply to NASA

John Q McDonald
John Q McDonald
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Along with ICESat, a secondary payload on its Delta II rocket was CHIPSat, the only UNEX class satellite, carrying the Cosmic Hot Interstellar Spectrometer to study hot gas in our local galactic bubble. The mission provided som limits to local hot gas conditions. It was built at Spacedev and operated from University of California, Berkeley

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