If you happened to se green lasers shining over Mount Fuji on September 16, 2022, it wasn’t aliens, just NASA’s Ice, Cloud and Land Elevation Satellite 2 (ICESat-2), which had flown overhead that night. This is the first time the team has been able to see the green laser beams streaming from orbit to Earth.
ICESat-2 utilizes its laser light to measure the height of Earth’s ice, water, and land surfaces from space. Its laser instrument fires 10,000 times a second, sending six beams of light to Earth. Computer programs can then use these measurements to determine the heights of freshwater reservoirs, map shallow coastal regions, and more.
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ICESat-2 appeared to be almost directly overhead of him, with the beam hitting the low clouds at an angle. To see the laser, you have to be in the exact right place, at the right time, and you have to have the right conditions,” said Tony Martino, ICESat-2 instrument scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.
