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 NASA's Multiple Altimeter Beam Experimental Lidar flew over Southwest Greenland's glaciers and sea ice to test a new method of measuring the height of Earth from space. (NASA/Tim Williams)

 Read: New NASA Laser Technology Reveals How Ice Measures Up

 

MABEL, short for "Multiple Altimeter Beam Experimental Lidar," serves as an ICESat-2 simulator. (NASA/Kelly Brunt)

 

 

 

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