Assessment of NASA airborne laser altimetry data using groundbased
GPS data near Summit Station, Greenland
Kelly M. Brunt1,2, Robert L. Hawley3, Eric R. Lutz3, Michael Studinger2, John G. Sonntag4,5, Michelle A. Hofton6, Lauren C. Andrews7,2, and Thomas A. Neumann21Earth System Science Interdisciplinary Center (ESSIC), University of Maryland, College Park, MD, USA 2NASA Goddard Space Flight Center, Greenbelt, MD, USA 3Department of Earth Sciences, Dartmouth College, Hanover, NH, USA 4AECOM Corporation, Wallops Island, VA, USA 5Wallops Flight Facility, NASA Goddard Space Flight Center, Wallops Island, VA, USA 6Department of Geographical Sciences, University of Maryland, College Park, MD, USA 7Universities Space Research Association (USRA), Columbia, MD, USA
Abstract. A series of NASA airborne lidars have been used in support of satellite laser altimetry missions. These airborne laser altimeters have been deployed for satellite instrument development, for spaceborne data validation, and to bridge the data gap between satellite missions. We used data from ground-based GPS surveys of an 11,000 m long track near Summit Station, Greenland, to assess the surface elevation bias and measurement precision of three airborne laser altimeters, including the Airborne Topographic Mapper (ATM), the Land, Vegetation, and Ice Sensor (LVIS), and the Multiple Altimeter Beam Experimental Lidar (MABEL). Data from the monthly ground-based traverses, which commenced in 2006, allowed for the assessment of 8 airborne lidar surveys associated with ATM and LVIS. Surface elevation biases for these altimeters, over the flat, ice-sheet interior, are less than 0.12 m, while assessments of measurement precision are 0.09 m or better. Results from the analyses of ground-based and airborne data provide guidance for validation strategies for ICESat-2 elevation and elevation-change data products.
Brunt, K. M., Hawley, R. L., Lutz, E. R., Studinger, M., Sonntag, J. G., Hofton, M. A., Andrews, L. C., and Neumann, T. A.: Assessment of NASA airborne laser altimetry data using groundbased
GPS data near Summit Station, Greenland, The Cryosphere Discuss., doi:10.5194/tc-2016-214, in review, 2016.