National Snow & Ice Data Center Distributed Active Archive Center

nasa-nsidcdaac-gla12

GLAS/ICESat L2 Antarctic and Greenland Ice Sheet Altimetry Data

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 (GLA12) provides surface elevations for ice sheets. 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.

nsidc.org

http://nsidc.org/data/GLA12

Identified by : GLA12

This dataset was released on June 18, 2014.

The time range for this dataset is February 20, 2003 to October 11, 2009.

The spatial range for this dataset is -86° to 86° latitude, and -180° to 180° longitude. map (center)

This dataset uses data from an instance of the geoscience-laser-altimeter-system instrument on the ice-cloud-and-land-elevation-satellite platform.
DOI : 10.5067/ICESAT/GLAS/DATA225
Also known as :

• identifier b022c00b-d7b7-4339-a1c3-6a75dcda1dfd (datagov lexicon)
• dataset glas-icesat-l2-sea-ice-altimetry-data-hdf5-v034 (datagov lexicon)
• dataset oai:nsidc/GLA12 (nsidc lexicon)