GLAS/ICESat L1B Global Backscatter Data
Entry ID:
GLA07
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Summary
Abstract:
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 global backscatter data (GLA07) are provided at full instrument resolution. The product includes full 532 nm (41.1 to -1.0 km) and 1064 nm (20 to -1 km) calibrated attenuated backscatter profiles at 5 times per second, and from 10 to -1 km, at 40 times per second for both channels. Also included are calibration coefficient values and molecular backscatter profiles at once per second. Data granules contain approximately 190 minutes (2 orbits) of data. Each data granule has an associated browse product that users can quickly peruse 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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Description:
Refine your granule search with ECHO's next generation Earth Science discovery tool (Reverb) using information from this record.
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Geographic Coverage
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Spatial coordinates
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N: 86.0
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S: -86.0
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E: 180.0
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W: -180.0
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Data Set Citation
Dataset Originator/Creator:
H.J. Zwally, R. Schutz, W. Hart, D. Hlavka, S. Palm,
Dataset Title:
GLAS/ICESat L1B Global Backscatter Data
Dataset Release Date:
2003-01-01
Dataset Release Place:
Boulder, CO U.S.A.
Dataset Publisher:
National Snow and Ice Data Center (NSIDC)
Version:
18
Online Resource:
http://nsidc.org/data/gla07.html
Data Resolution
Temporal Resolution:
1/40 second full-rate data
Temporal Resolution Range:
< 1 second
Quality
Browse products in PNG graphic format contain quality information; these are available along with corresponding data granules in the Data Pool or EOS Data Gateway.
Use Constraints
Piston/0.2.2 (Django 1.2.1) crash report:Method signature does not match.Resource does not expect any parameters.Exception was: node contents must be a string
Data Set Progress
IN WORK
Distribution
Distribution Media:
FTP
Distribution Size:
827 MB per granule
Distribution Format:
scaled integer binary
Personnel
Role:
TECHNICAL CONTACT
Phone:
+1 (303) 492-6199
Fax:
+1 (303) 492-2468
Email:
nsidc at nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City:
Boulder
Province or State:
CO
Postal Code:
80309-0449
Country:
USA
Role:
TECHNICAL CONTACT
Email:
David.W.Hancock at nasa.gov
Contact Address:
ISIPS Manager
NASA Goddard Space Flight Center
Wallops Flight Facility
USA
City:
Wallops Island
Province or State:
VA
Country:
USA
Role:
INVESTIGATOR
Phone:
301-614-5643
Fax:
301-614-5644
Email:
Jay.Zwally at nasa.gov
Contact Address:
Laboratory for Hydrospheric Processes
NASA/Goddard Space Flight Center
Code 614
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Role:
INVESTIGATOR
Phone:
512-471-1356
Fax:
512-471-3570
Email:
schutz at utcsr.ae.utexas.edu
Contact Address:
GLAS Science Team Lead
University of Texas at Austin
Center for Space Research
City:
Austin
Province or State:
TX
Postal Code:
78712-1085
Country:
USA
Role:
INVESTIGATOR
Contact Address:
Science Systems and Applications, Inc.
City:
Lanham
Province or State:
MD
Postal Code:
20706
Country:
USA
Role:
INVESTIGATOR
Phone:
(301) 286-4936
Fax:
(301) 286-1762
Email:
billhart at virl.gsfc.nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Code 912.0
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Role:
INVESTIGATOR
Phone:
(301) 286-1762
Phone:
(301) 286-5578
Email:
sgdlh at virl.gsfc.nasa.gov
Contact Address:
NASA/GSFC
Code 912
Room 366A, Building 22
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Role:
INVESTIGATOR
Phone:
301-614-6274
Email:
James.D.Spinhirne at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Mailstop 613.1
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Role:
INVESTIGATOR
Contact Address:
NASA/Goddard Space Flight Center
City:
Greenbelt
Province or State:
MD
Postal Code:
20770
Country:
USA
Publications/References
Bae, S. and B.E. Schutz. 2002. Precision attitude determination (PAD). GLAS algorithm theoretical basis document. Version 2.2. Austin, TX: Center for Space Research, University of Texas at Austin. Center for Space Research. 'ICESat/GLAS.' January 2002. http://www.csr.utexas.edu/glas/. Earth Science Data and Information System (ESDIS). 1996. EOS Ground System (EGS) Systems and Operations Concept. ... Greenbelt, MD: Goddard Space Flight Center. GLAS Science Team. 2000. Mission Operations Requirement Document (MORD) for the Ice, Cloud and Land Elevation Satellite (ICESat) Mission. Greenbelt, MD: Goddard Space Flight Center. GLAS Science Team. 1997. GLAS Science Requirements. Version 2.01. Greenbelt, MD: Goddard Space Flight Center. Guzzi, R., ed. 2003. Exploring the atmosphere by remote sensing techniques. Heidelberg, Germany: Springer-Verlag. Heroux, D. 2000. Progress report on GLAS interface effort with ECS NOSE. Rev. 29 December 2000. Landover, MD: Emergent-IT/Raytheon. Herring, T.A. and K. Quinn. 1999. Atmospheric delay correction to GLAS laser altimeter ranges. GLAS algorithm theoretical basis document. Version 1.0. Lanham, MD: Science Systems and Applications, Inc. Jester, P., and J. Lee. 2002. GLAS standard data products specification - level 1. Version 6.0. Wallops Island, VA: Raytheon ITSS. Lee, J. 2002. GSAS user's guide: Version 4.0. Wallops Island, VA: Raytheon ITSS. Palm, S., W. Hart, and D. Hlavka. 2002. GLAS atmospheric data products. GLAS algorithm theoretical basis document. Version 4.2. Lanham, MD: Science Systems and Applications, Inc. Rim, H., and B. Schutz. 2002. Precision orbit determination. GLAS algorithm theoretical basis document. Version 2.2. Austin, TX: Center for Space Research, University of Texas at Austin. Schutz, B. 2002. Laser footprint location (geolocation) and surface profiles.GLAS algorithm theoretical basis document. Version 3.0. Austin, TX: Center for Space Research, University of Texas at Austin. Schutz, B. 2000. GLAS altimeter post-launch calibration/validation plan. Version 0.99. Austin, TX: Center for Space Research, University of Texas at Austin. Stephens, G.L. 1994. Remote sensing of the lower atmosphere: an introduction. New York: Oxford University Press. Wahr, J., D. Wingham, and C. Bentley. 2000. A method of combining ICESat and GRACE satellite data to constrain Antarctic mass balance. Journal of Geophysical Research 105(B7):16,279-16,294. Yi, D., J. Minster, and C. Bentley. 1999. Ocean tidal loading corrections. GLAS algorithm theoretical basis document. Version 1.0. Greenbelt, MD: Goddard Space Flight Center. Zwally, H.J., B. Schutz, D. Hancock, and A. Brenner. 2000. ICESat/GLAS Standard Data Products in HDF and SCF Formats. Version 1.2. Greenbelt, MD: Goddard Space Flight Center.
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date:
2003-10-14
Last DIF Revision Date:
2011-02-04
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