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GLAS/ICESat L2 Global Thin Cloud/Aerosol Optical Depths Data

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Identification Information:

Dataset Identifier:

GLA11

Citation:

Citation Information:

Originator: Zwally, H., R. Schutz, W. Hart, D. Hlavka, S. Palm, J. Spinhirne, and E. Welton.
Publication Date: 20110811
Title: GLAS/ICESat L2 Global Thin Cloud/Aerosol Optical Depths Data
Edition: 33
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC: National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/gla11.html
Online Linkage: http://dx.doi.org/10.5067/ICESAT/GLAS/DATA224

Description:

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-2 thin cloud/aerosol optical depths data (GLA11) contain thin cloud and aerosol optical depths. A thin cloud is one that does not completely attenuate the lidar signal return, which generally corresponds to clouds with optical depths less than about 2.0.


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.

Purpose: scientific research

Documentation:

User's Guide:

Citation Information:

Originator: Zwally, H., R. Schutz, W. Hart, D. Hlavka, S. Palm, J. Spinhirne, and E. Welton.
Publication Date: 20110811
Title: GLAS/ICESat L2 Global Thin Cloud/Aerosol Optical Depths Data
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC: National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/docs/daac/glas_icesat_l1_l2_global_atmosphere.gd.html

Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 20030930
Ending Date: 20091011

Currentness Reference: publication date

Status:

Progress: Complete
Maintenance and Update Frequency: Unknown

Spatial Domain:

Bounding Coordinates:

 

West Bounding Coordinate: -180°
East Bounding Coordinate: 180°
North Bounding Coordinate: 86°
South Bounding Coordinate: -86°

Keywords:

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Science Keywords
Theme Keyword: EARTH SCIENCE Atmosphere Aerosols Aerosol Optical Depth/Thickness
Theme Keyword: EARTH SCIENCE Atmosphere Clouds Cloud Optical Depth/Thickness

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Project Keywords
Theme Keyword: ICESAT Ice, Cloud and Land Elevation Satellite

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Instrument Keywords
Theme Keyword: ALTIMETERS
Theme Keyword: GLAS Geoscience Laser Altimeter System
Theme Keyword: LIDAR Light Detection and Ranging

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Platform Keywords
Theme Keyword: ICESAT Ice, Cloud and Land Elevation Satellite
Theme Keyword: SATELLITES

Theme:

Theme Keyword Thesaurus: ISO 19115 Topic Categories
Theme Keyword: climatologyMeteorologyAtmosphere

Theme:

Theme Keyword Thesaurus: None
Theme Keyword: Aerosol Layer Height
Theme Keyword: Aerosol Multiple Scattering Coefficients
Theme Keyword: Attenuated Backscatter Cross-section
Theme Keyword: Backscatter
Theme Keyword: DAAC
Theme Keyword: EOSDIS
Theme Keyword: GLA11
Theme Keyword: GLAS
Theme Keyword: Global Positioning System
Theme Keyword: GPS
Theme Keyword: ICESat
Theme Keyword: ISIPS
Theme Keyword: Laser Return Energy
Theme Keyword: Lidar
Theme Keyword: Lidar Backscatter
Theme Keyword: Lidar Return Signal
Theme Keyword: NASA
Theme Keyword: NSIDC
Theme Keyword: Orbit Number
Theme Keyword: Precision Attitude Determination
Theme Keyword: Precision Orbit Determination
Theme Keyword: Range

Place:

Place Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Location Keywords
Place Keyword: Geographic Region Global

Access Constraints:

None

Use Constraints:

None

Point of Contact:

Contact Information:

Contact Person Primary:

Contact Person: NSIDC User Services
Contact Organization: National Snow and Ice Data Center

Contact Address:

Address Type: mailing
Address:
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199 x
Contact Facsimile Telephone: 1 303 492-2468 x
Contact Electronic Mail Address: nsidc@nsidc.org

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Distribution Information:

Distributor:

Contact Information:

Contact Organization Primary:

Contact Organization: National Snow and Ice Data Center
Contact Person: NSIDC User Services

Contact Address:

Address Type: mailing
Address:
  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199
Contact Facsimile Telephone: 1 303 492-2468
Contact Electronic Mail Address: nsidc@nsidc.org

Resource Description:

GLA11

Distribution Liability:

NSIDC cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NSIDC makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: Binary

Digital Transfer Option:

Online Option:

Computer Contact Information:

Network Address:

Network Resource Name: Click here.

Fees: None

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Metadata Reference Information:

Metadata Date:

20140714

Metadata Review Date:

20140714

Metadata Contact:

Contact Information:

Contact Person Primary:

Contact Person: NSIDC User Services
Contact Organization: National Snow and Ice Data Center

Contact Address:

Address Type: mailing
Address:
  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199
Contact Facsimile Telephone: 1 303 492-2468
Contact Electronic Mail Address: nsidc@nsidc.org

Metadata Standard Name:

FGDC Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata

Metadata Standard Version:

FGDC-STD-012-2002

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Metadata Views

FGDC Text-Only

Federal Geographic Data Committee (FGDC) in plain text

FGDC XML

Federal Geographic Data Committee (FGDC) in Extensible Markup Language (XML)

DIF HTML

NASA Global Change Master Directory (GCMD) Directory Interchange Format (DIF)

ISO HTML

International Organization for Standardization (ISO) 19115:2003 Geographic Information Metadata