GLAS/ICESat L1B Global Waveform-based Range Corrections Data, Version 18

• Main Author: National Snow and Ice Data Center
• Format: Dataset
• Language: unknown
• Subjects: Ice Sheet; Sea ice
• Online Access: https://search.dataone.org/view/sha256:73c4720103f3ae5c367e0d55eb364539215dd3d6bb07dcc5099c9ca9f132d0f9

The Geoscience Laser Altimeter System (GLAS) instrument on the Ice, Cloud, and Land Elevation Satellite (ICESat) provides global measurements of polar ice sheet elevation to discern changes in ice volume (mass balance) over time. Secondary objectives of GLAS are to measure sea ice roughness and thickness, cloud and atmospheric properties, land topography, vegetation canopy heights, ocean surface topography, and surface reflectivity. GLAS has a 1064 nm laser channel for surface altimetry and dense cloud heights, and a 532 nm lidar channel for the vertical distribution of clouds and aerosols. Level-1B waveform parameterization data (GLA05) include output parameters from the waveform characterization procedure and other parameters required to calculate surface slope and relief characteristics. Each data granule has an associated browse product that users can quickly view to determine the general quality of the data in the granule. Browse products consist of image plots of key parameters and statistics. Data are in scaled integer binary format, big-endian (Unix) byte order, and are available via FTP.