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Final Delta 2 rocket launch puts NASA’s ICESAT-2 satellite in orbit to monitor ice

15 Sep 2018, 14:19 UTC
Final Delta 2 rocket launch puts NASA’s ICESAT-2 satellite in orbit to monitor ice
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A United Launch Alliance Delta 2 rocket rises from its launch pad at Vandenberg Air Force Base in California, carrying NASA’s ICESAT-2 satellite into orbit. (NASA via YouTube)
NASA kicked off its ICESat-2 mission to monitor our planet’s ice sheets from space using a laser-scanning satellite this morning, with a launch that marked the end of a nearly 30-year run for United Launch Alliance’s Delta 2 rocket.
Liftoff came at 6:02 a.m. PT from Vandenberg Air Force Base in California, after a slight delay in the countdown due to concerns about the chilldown of the rocket’s helium bottles. The two-stage rocket made a trouble-free ascent to orbit.
ICESat-2 follows up on an earlier NASA mission that used laser-ranging data to measure ice sheet balance and sea level. This time around, the laser-scanning instrument will be capable of measuring Earth’s elevation every 30 inches (70 centimeters) across a 30-foot-wide track as it circles the planet.
The data will help scientists determine how climate change is affecting global ice levels, and how changes in the ice affect the height of Earth’s oceans.
“ICESat–2 is designed to answer a simple glaciology question very, very well: It will tell us where, and how fast, ...

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