Data Set ID: 
GLAH01

GLAS/ICESat L1A Global Altimetry Data (HDF5), Version 33

Level-1A altimetry data (GLAH01) include the transmitted and received waveform from the altimeter. Each data granule has an associated browse product.

This is the most recent version of these data.

Version Summary: 

For information about Version 33, see the NSIDC ICESat Description of Data Releases page.

STANDARD Level of Service

Data: Data integrity and usability verified

Documentation: Key metadata and user guide available

User Support: Assistance with data access and usage; guidance on use of data in tools

See All Level of Service Details

Parameter(s):
  • INFRARED WAVELENGTHS > SENSOR COUNTS > Waveform
Data Format(s):
  • HDF
Spatial Coverage:
N: 86, 
S: -86, 
E: 180, 
W: -180
Platform(s):ICESat
Spatial Resolution:
  • 60 m to 70 m x 60 m to 70 m
Sensor(s):ALTIMETERS, CD, GLAS, GPS Receiver, LA, PC
Temporal Coverage:
  • 20 February 2003 to 11 October 2009
Version(s):V33
Temporal Resolution23 minuteMetadata XML:View Metadata Record
Data Contributor(s):H. Zwally, Robert Schutz, Charles Bentley, Jack Bufton, Thomas Herring, Jean-Bernard Minster, James Spinhirne, Robert Thomas

Geographic Coverage

Other Access Options

Other Access Options

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As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Zwally, H. J., R. Schutz, C. Bentley, J. Bufton, T. Herring, J. Minster, J. Spinhirne, and R. Thomas. 2013. GLAS/ICESat L1A Global Altimetry Data (HDF5), Version 33. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/ICESAT/GLAS/DATA101. [Date Accessed].

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How To

Programmatic Data Access Guide
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FAQ

Do you have code for reading HDF data files into MATLAB, IDL, Python, or NCL?
The HDF Group has example code for access and visualization of MODIS, GLAS HDF5, AMSR-E, and NISE data in MATLAB, IDL, Python, and NCL.
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Analysis of altimetric data acquired by the GLAS instrument requires accurate determination of the laser spot location on the Earth's surface (ice, land, water, clouds) or geolocation of the laser spot. The spot location with respect to the Earth's center of mass (geocenter) is determined by both... read more
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