Laser vs. Radar: Shocking Secrets of Earth’s Shrinking Ice Revealed from Space
ICESat-2 (NASA) launched September 15, 2018 on a Delta II rocket and carries the Advanced Topographic Laser Altimeter System (ATLAS), a photon-counting laser that operates from a ~481 km near-polar orbit (92°) with ground tracks repeating every 91 days to map ice sheets, sea-ice