Airborne Validation of ICESat-2 ATLAS Data over Crevassed Surfaces and Other Complex Glacial Environments: Results from Experiments of Laser Altimeter and Kinematic GPS Data Collection from a Helicopter over a Surging Arctic Glacier (Negribreen, Svalbard) - Lawson, Matthew; Professor Dr. Herzfeld, Ute C; Trantow, Thomas; Nylen, Thomas (2022)