Name: GLAS/ICESat L2 Global Cloud Heights for Multi-layer Clouds, Version 18
Creator: National Snow and Ice Data Center
Keywords: CLOUD HEIGHT,CLOUD VERTICAL DISTRIBUTION

GLAS/ICESat L2 Global Cloud Heights for Multi-layer Clouds, Version 18

Data set id:

GLA09

DOI: 10.5067/1V95T2TVCCIE

Data Citation and Acknowledgment
As a condition of using these data, you must cite the use of this data set. Such a practice gives credit to data set producers and advances principles of transparency and reproducibility.

Zwally, H. J., Schutz, R., Hart, W., Hlavka, D., Palm, S., Spinhirne, J. & Welton, E. (2003). GLAS/ICESat L2 Global Cloud Heights for Multi-layer Clouds. (GLA09, Version 18). [Data Set]. Boulder, Colorado USA. National Snow and Ice Data Center. https://doi.org/10.5067/1V95T2TVCCIE. [describe subset used if applicable]. Date Accessed 09-24-2025.

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Overview

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-2 cloud heights for multi-layer clouds (GLA09) contain cloud layer top and bottom height data at sampling rates of 4 sec, 1 sec, 5 Hz, and 40 Hz. 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.

Parameter(s):

CLOUD HEIGHT

CLOUD VERTICAL DISTRIBUTION

Platform(s):

ICESat

Sensor(s):

ALTIMETERS

GLAS

Data Format(s):

Binary

Temporal Coverage:

13 January 2003 to 13 January 2010

Temporal Resolution:

Not Specified

Spatial Resolution:

Not Specified

Spatial Reference System(s):

Not Specified

Spatial Coverage:

N:
86
S:
-86
E:
180
W:
-180

Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.

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This data set has been retired. There is a more recent version of these data.

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