GLAS/ICESat L2 Global Land Surface Altimetry Data

Data Contributors ZWALLY, H. JAY SCHUTZ, ROBERT BENTLEY, CHARLES BUFTON, JACK HERRING, THOMAS MINSTER, JEAN-BERNARD SPINHIRNE, JAMES THOMAS, ROBERT Parameters REFLECTANCE > Laser Reflectance TERRAIN ELEVATION Instruments ALTIMETERS GLAS : GEOSCIENCE LASER ALTIMETER SYSTEM

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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.

This level-2 altimetry product (GLA14) provides surface elevations for land. Data also include the laser footprint gelocation and reflectance, as well as geodetic, instrument, and atmospheric corrections for range measurements.

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.

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Data Citation

The following example shows how to cite the use of this data set in a publication. List the principal investigators, year of data set release, data set title and version, dates of data you used, publishers (NSIDC), and digital media.

Zwally, H.J., R. Schutz, C. Bentley, J. Bufton, T. Herring, J. Minster, J. Spinhirne, R. Thomas. 2003, updated current year. GLAS/ICESat L2 Global Land Surface Altimetry Data V018, 15 October to 18 November 2003. Boulder, CO: National Snow and Ice Data Center. Digital media.

See Also

• ICESat/GLAS Data at NSIDC
• Polar Ice Sheet DEMs and Elevation Data
• Contact User Services