Digital SAR Mosaic and Elevation Map of the Greenland Ice Sheet

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Fahnestock, Mark, Simon Ekholm, Kenneth Knowles, Ron Kwok, Ted Scambos
Publication_Date: 19970101
Title: Digital SAR Mosaic and Elevation Map of the Greenland Ice Sheet
Edition:
Geospatial_Data_Presentation_Form:
Series_Information:
Series_Name:
Issue_Identification:
Publication_Information:
Publication_Place: Boulder, Colorado USA
Publisher: NSIDC: National Snow and Ice Data Center
Other_Citation_Details:
Online_Linkage: http://nsidc.org/data/nsidc-0052.html
Description:
Abstract:
The Digital SAR Mosaic and Elevation Map of the Greenland Ice Sheet CD-ROM combines the most detailed synthetic aperture radar (SAR) image mosaic available with the best current digital elevation model. The mosaic image shows both the location of the ice edge and the distribution of melt-related 'scatterers' on the surface. These scatterers include ice lenses and complex layered structure in the percolation zone and bare ice of the ablation zone. Other melt-related features that can be seen include lake and surface meltwater stream channels at lower elevations, as well as ice-marginal lakes. This characterization of the ice sheet provides a reference against which future change can be measured. Changing conditions resulting from climatic variation should show up as changes in the ice margin and shifts in the hydrologic zones. It is hoped that the standard reference provided by this data set can facilitate activities aimed at change detection and promote other work aimed at understanding the processes operating on the ice sheet. The image data are derived from SAR image swaths acquired by the ERS-1 satellite during August of 1992. The mosaic was assembled at the Jet Propulsion Laboratory (JPL) and Goddard Space Flight Center (GSFC). Its component images are a copyrighted product of the European Space Agency. The mosaic, a value-added derived product, is available to individuals and non-profit organizations for research oriented purposes only. The Danish geodetic and cadastral agency Kort-og Matrikelstyrelsen (KMS) compiled the elevation data provided with the product from a number of sources, including field surveys, aerial photographs, and the ERS-1 radar altimeter. The elevation data are also provided only to individuals and non-profit organizations for research oriented purposes. Included with the data is NSIDC's limb (large image map browser) software, which was developed in-house and allows UNIX users to easily select and view portions of the mosaic image with elevation contours derived from the elevation data overlain. Limb is provided as 'freeware' for general use. NSIDC distributes the Digital SAR Mosaic and Elevation Map of the Greenland Ice Sheet on CD-ROM at no charge.
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Andersen, Ole Baltazar. 1994. ERS-1 altimetry on the Greenland ice sheet: Preliminary investigations of annual variations. Geophysical Research Letters 21(15):1655-1658. Binschadler, R. A., and P. L. Vornberger. 1993. Interpretation of SAR imagery of the Greenland ice sheet using coregistered TM imagery. Remote Sensing of Environment 167-175. Ekholm, S. 1996. A full coverage, high-resolution topographic model of Greenland computed from a variety of digital elevation data. Journal of Geophysical Research 101(B10):21961-21972. Ekholm, S., R. Forsberg, and J. M. Brozena. 1995. Accuracy of satellite altimeter elevations over the Greenland ice sheet. Journal of Geophysical Research 100(C2):2687-2696. Fahnestock, M. A., and R. A. Bindschadler. 1993. Description of a program for SAR investigation of the Greenland ice sheet and an example of margin change detection using SAR. Annals of Glaciology 39(131): 119-132. Fahnestock, M., R. Bindschadler, R. Kwok, and K. Jezek. 1993. Greenland ice sheet surface properties and ice dynamics from ERS-1 SAR imagery. Science 262:1530-1534. Fahnestock, M., R. Bindschadler, R. Kwok, and K. Jezek. 1993. Greenland ice sheet surface properties and ice dynamics from ERS-1 SAR imagery.Science 262: 1525-1530. Jezek, K. C., and S. Grace. 1991. Synthetic Aperture Radar observations of the Greenland ice sheet. EOS Suppl., p. 150. Jezek, K. C. 1992. Spatial patterns in radar backscatter strength across the Greenland ice sheet. EOS Suppl., p. 181. Jezek, K. C., and S. P. Gogineni. 1992. Microwave remote sensing of the Greenland ice sheet. IEEE Geoscience and Remote Sensing Newsletter 9:6-10. Jezek, K. C., M. R. Drinkwater, J. P. Crawford, R. Bindschadler, and R. Kwok. 1993. Analysis of Synthetic Aperture Radar data collected over the southwestern Greenland ice sheet. Journal of Glaciology 39(131): 115-132. Jezek, K. C., P. Gogineni, and M. Chanableh. 1994. Radar measurements of melt zones on the Greenland ice sheet. Geophysical Research Letters 21(1): 33-36. Knowles, K. 1992. Points, Pixels, Grids, and Cells: A Mapping and Gridding Primer. Unpublished report to the National Snow and Ice Data Center, Boulder, CO. Rignot, E. J., S. J. Austria, J. J. V. Zyl, and K. C. Jezek. 1993. Unusual radar echoes from the Greenland ice sheet. Science 261:1710-1713. Rignot, E., J. V. Zyl, S. Ostro, and K. C. Jezek. 1993. Unusual radar echoes from the percolation zone of the Greenland ice sheet. EOS Suppl., p. 247. Rignot, E. 1995. Backscatter model for the unusual radar properties of the Greenland ice sheet. Journal of Geophysical Research 100(E5): 9389-9400. Simonett, D. S., F. T. Ulaby, J. E. Estes, and G. A. Thorley, eds. 1983. Manual of remote sensing, Falls Church, Virginia: American Society of Photogrammetry. Vornberger, P. L., and R. A. Bindschadler. 1992. Multi-spectral analysis of ice sheets using co-registered SAR and TM imagery. International Journal of Remote Sensing 13(4): 637-645. Zwally, R. A. Bindschadler, A. C. Brenner, and R. H. Thomas. 1983. Surface elevation contours of Greenland and Antarctic ice sheets. Journal of Geophysical Research 88: 1589-1596.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19910101
Ending_Date: 19951231
Currentness_Reference:Unknown
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19920802
Ending_Date: 19920909
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.0
East_Bounding_Coordinate: -10.0
North_Bounding_Coordinate: 84.0
South_Bounding_Coordinate: 60.0
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: PROJECT
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER ELEVATION/ICE SHEET ELEVATION
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER TOPOGRAPHY/ICE SHEET TOPOGRAPHY
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE EDGES
Theme_Keyword: EARTH SCIENCE > OCEANS > SEA ICE > ICE EDGES
Theme_Keyword: EARTH SCIENCE > SPECTRAL/ENGINEERING > RADAR > RADAR BACKSCATTER
Theme_Keyword: EARTH SCIENCE > SPECTRAL/ENGINEERING > RADAR > RADAR CROSS-SECTION
Theme_Keyword: EARTH SCIENCE > SPECTRAL/ENGINEERING > RADAR > RADAR IMAGERY
Theme_Keyword: EARTH SCIENCE > SPECTRAL/ENGINEERING > RADAR > RADAR REFLECTIVITY
Theme_Keyword: EARTH SCIENCE > SPECTRAL/ENGINEERING > RADAR > RETURN POWER
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > GLACIERS/ICE SHEETS > GLACIER ELEVATION/ICE SHEET ELEVATION
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > GLACIERS/ICE SHEETS > GLACIER TOPOGRAPHY/ICE SHEET TOPOGRAPHY
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS
Theme_Keyword: ERS-1 > EUROPEAN REMOTE SENSING SATELLITE-1
Theme_Keyword: GEOSAT > GEODETIC SATELLITE
Theme_Keyword: RADAR ALTIMETERS
Theme_Keyword: SAR > SYNTHETIC APERTURE RADAR
Theme_Keyword: VISUAL OBSERVATIONS
Theme_Keyword: EOSDIS > EARTH OBSERVING SYSTEM DATA INFORMATION SYSTEM
Theme_Keyword: ESIP > EARTH SCIENCE INFORMATION PARTNERS PROGRAM
Theme_Keyword: ELEVATION
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: IMAGERY/BASE MAPS/EARTH COVER
Theme_Keyword: INLAND WATERS
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > NORTH AMERICA > GREENLAND
Place_Keyword: GEOGRAPHIC REGION > POLAR
Place_Keyword: GEOGRAPHIC REGION > ARCTIC
Access_Constraints: This data set is available for non-profit, research-oriented purposes only. Prospective users of the product are required to complete a Research Agreement stating that the image and elevation data will be only be used under the specified terms and conditions.
Use_Constraints:
For non-profit, research-oriented purposes only.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: NSIDC USER SERVICES
Contact_Position: TECHNICAL CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: National Snow and Ice Data Center
Address: CIRES, 449 UCB
Address: 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
Browse_Graphic:
Browse_Graphic_File_Name: http://nsidc.org/data/docs/daac/nsidc0075_geosat/images/greenland.gif
Browse_Graphic_File_Description:
A low-resolution sample view of the DEM and Radar image coverage.
Browse_Graphic_File_Type:
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The accuracy and precision of the DEM is not adequate for the detection of real ice surface elevation changes over time, and thus the DEM should not be used for such purposes. Additional processing would be necessary before the DEM could be used as part of a scheme for elevation change detection.
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 100 m
Latitude_Resolution: 2 km
Longitude_Resolution: 100 m
Longitude_Resolution: 2 km
Geographic_Coordinate_Units: Decimal degrees
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 100 m
Latitude_Resolution: 2 km
Longitude_Resolution: 100 m
Longitude_Resolution: 2 km
Geographic_Coordinate_Units: Decimal degrees
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: Not Available
Altitude_Resolution: 13 m
Altitude_Distance_Units: Not Available
Altitude_Encoding_Method: Implicit coordinate
Depth_System_Definition:
Depth_Datum_Name: Not Available
Depth_Resolution: 13 m
Depth_Distance_Units: Not Available
Depth_Encoding_Method: Implicit coordinate
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: Not Available
Altitude_Resolution: 13 m
Altitude_Distance_Units: Not Available
Altitude_Encoding_Method: Implicit coordinate
Depth_System_Definition:
Depth_Datum_Name: Not Available
Depth_Resolution: 13 m
Depth_Distance_Units: Not Available
Depth_Encoding_Method: Implicit coordinate
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NSIDC_DAAC > NSIDC Distributed Active Archive Center
Contact_Person: NSIDC USER SERVICES
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: National Snow and Ice Data Center
Address: CIRES, 449 UCB
Address: 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
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NSIDC > National Snow and Ice Data Center
Contact_Person: NSIDC USER SERVICES
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: National Snow and Ice Data Center
Address: CIRES, 449 UCB
Address: 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: NSIDC-0052
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Binary
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://nsidc.org/daac/index.html
Access_Instructions:
DATA CENTER URL
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://nsidc.org
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://reverb.echo.nasa.gov/reverb/#utf8=%E2%9C%93...
Access_Instructions:
Refine your granule search with ECHO's next generation Earth Science discovery tool (Reverb) using information from this record.
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://nsidc.org/data/docs/daac/nsidc0052_greenlan...
Access_Instructions:
Online documentation.
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://nsidc.org/data/docs/daac/nsidc0052_greenlan...
Access_Instructions:
Research agreement that prospective users of the product are required to complete stating that the image and elevation data will be only be used under the specified terms and conditions.
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://nsidc.org/data/dems/index.html
Access_Instructions:
Polar Ice Sheet DEMs and Elevation Data
Fees: Not Available
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Metadata_Reference_Information:
Metadata_Date: 19970101
Metadata_Review_Date: 20130814
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: GCMD User Support Office
Contact_Organization: NASA Global Change Master Directory
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Not Available
City: Lanham
State_or_Province: MD
Postal_Code: 20706
Country: USA
Contact_Voice_Telephone: Not Available
Contact_Electronic_Mail_Address: gcmduso@gcmd.gsfc.nasa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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