Entry_ID: NSIDC-0334
Entry_Title: Airborne Laser Altimetry of the Thwaites Glacier Catchment, West Antarctica
Group: Data_Set_Citation
   Dataset_Creator: Duncan Young
   Dataset_Title: Airborne Laser Altimetry of the Thwaites Glacier Catchment, West Antarctica
   Dataset_Release_Date: 2008-01-01
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC: National Snow and Ice Data Center
   Online_Resource: http://nsidc.org/data/nsidc-0334.html
   Dataset DOI: http://dx.doi.org/10.7265/N5HD7SK8
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Duncan
   Middle_Name: A.
   Last_Name: Young
   Group: Contact_Address
      Address: University of Texas at Austin
      Address: Jackson School of Geosciences, Institute for Geophysics
      Address: J.J. Pickle Research Campus
      Address: Bldg. 196
      Address: 10100 Burnet Road (R2200)
      Address: Austin, TX 78758-4445
      City: Austin
      Province_or_State: Texas
      Postal_Code: 78758-4445
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Scott
   Middle_Name: D.
   Last_Name: Kempf
   Group: Contact_Address
      Address: University of Texas at Austin
      Address: Institute for Geophysics
      Address: Jackson School of Geosciences, 
      Address: J.J. Pickle Research Campus Bldg. 196
      Address: 10100 Burnet Road (R2200) 
      City: Austin
      Province_or_State: Texas
      Postal_Code: 78758-4445
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Donald
   Middle_Name: D.
   Last_Name: Blankenship
   Email: blank@ig.utexas.edu
   Group: Contact_Address
      Address: University of Texas at Austin
      Address: Institute for Geophysics
      Address: 4412 Spicewood Springs Rd. #600
      City: Austin
      Province_or_State: TX
      Postal_Code: 78759-8500
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: John
   Middle_Name: W.
   Last_Name: Holt
   Group: Contact_Address
      Address: University of Texas at Austin
      Address: Institute for Geophysics
      Address: 4412 Spicewood Springs Rd. #600
      City: Austin
      Province_or_State: TX
      Postal_Code:  78759-850
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: David
   Middle_Name: L.
   Last_Name: Morse
   Group: Contact_Address
      Address: University of Texas at Austin
      Address: Institute for Geophysics
      City: Austin
      Province_or_State: TX
   End_Group
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Glaciers/Ice Sheets
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Glacier Elevation/Ice Sheet Elevation
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Glacier Topography/Ice Sheet Topography
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Ice Sheets
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
Keyword: Airborne Laser Altimeters
Keyword: Airborne Laser Altimetry
Keyword: Altimetry
Keyword: Antarctica
Keyword: Digital Elevation Model
Keyword: Glacier
Keyword: Glacier Surface
Keyword: Ice Stream
Keyword: Thwaites Glacier
Sensor_Name: ALTIMETERS
Sensor_Name: GPS > Global Positioning System
Sensor_Name: INS > Inertial Navigation System
Source_Name: AIRCRAFT
Source_Name: FIELD SURVEYS
Group: Temporal_Coverage
   Start_Date: 2004-12-10
   Stop_Date: 2005-01-29
End_Group
Data_Set_Progress: complete
Group: Spatial_Coverage
   Southernmost_Latitude: -80
   Northernmost_Latitude: -75
   Westernmost_Longitude: -130
   Easternmost_Longitude: -95
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: ANTARCTICA
End_Group
Group: Quality

   The Quality flag (either 'PRIMARY' or 'SECONDARY') indicates whether the (root 
   mean square)RMS crossovers values of the data was low enough to allow it to 
   influence other data during leveling, or whether it should attempt to level to 
   other data.

End_Group
Group: Use_Constraints

   If these data are used in a publication, they should be cited using the 
   following reference: Young, D. A., S. D. Kempf, D. D. Blankenship, J. W. Holt, 
   and D. L. Morse (in press), New airborne laser altimetry over the Thwaites 
   Glacier Catchment, West Antarctica , Geochemistry, Geophysics, Geosystems, 
   doi:10.1029/2007GC001935 

   To help us serve the scientific and cryospheric research communities, please 
   acknowledge NSIDC: Data provided by the National Snow and Ice Data Center 
   DAAC, University of Colorado, Boulder, CO.'

End_Group
Data_Set_Language: English
Group: Data_Center
   Data_Center_Name: NSIDC > National Snow and Ice Data Center
   Data_Center_URL: http://nsidc.org
   Group: Personnel
      Role: Data Center Contact
      First_Name: NSIDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 
      Fax: 1 303  492-2468 
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Data_Center
   Data_Center_Name: AGDC > Antarctic Glaciological Data Center
   Data_Center_URL: http://nsidc.org/agdc/
   Group: Personnel
      Role: Data Center Contact
      First_Name: AGDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 x
      Fax: 1 303  492-2468 x
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 161 MB
   Distribution_Format: ASCII Text (.txt)
End_Group
Group: Reference

   Holt, J. W., D. D. Blankenship, D. L. Morse, D. A. Young, M. E. Peters, S. D. 
   Kempf, T. G. Richter, D. G. Vaughan, and H. Corr (2006), New boundary 
   conditions for the West Antarctic ice sheet: Subglacial topography of the 
   Thwaites and Smith Glacier catchments, Geophysical Research Letters, 
   33(L09502), 10.1029/2005GL025561.

   Blankenship, D. D., D. Morse, C. A. Finn, R. E. Bell, M. E. Peters, S. D. 
   Kempf, S. M. Hodge, M. Studinger, J. C. Behrendt, and J. M. Brozena (2001), 
   Geological controls on the initiation of rapid basal motion for West Antarctic 
   Ice Streams: A geophysical perspective including new airborne radar sounding 
   and laser altimetry results, in The West Antarctic Ice Sheet: Behavior and 
   Environment, Antarctic Research Series, vol. 77, edited by R. B. Alley and R. 
   A. Bindschadler, pp. 105–121, American Geophysical Union. 

   Young, D. A., S. D. Kempf, D. D. Blankenship, J. W. Holt, and D. L. Morse (in 
   press), New airborne laser altimetry over the Thwaites Glacier Catchment, West 
   Antarctica, Geochemistry, Geophysics, Geosystems, 10.1029/2007GC001935. 

    Diehl, T. M., J. W. Holt, D. D. Blankenship, D. A. Young, T. A. Jordan, and 
   F. Ferraccioli (2008), First airborne gravity results over the Thwaites 
   Glacier catchment, West Antarctica, Geochemistry, Geophysics, Geosystems, 
   8(Q04011), 10.1029/2007GC001878. 

   Diehl, T. M., J. W. Holt, D. D. Blankenship, D. A. Young, T. A. Jordan, and F. 
   Ferraccioli (2008), Antarctic airborne gravity data: Free-Air Gravity 
   Anomalies Over the Thwaites Glacier Catchment, West Antarctica. Boulder, 
   Colorado USA: National Geophysical Data Center, Digital media. 
   http://www.ngdc.noaa.gov/mgg/gravity/utig_agasea.html

End_Group
Group: Summary

   This data set includes airborne altimetry collected over the catchment and 
   main trunk of Thwaites Glacier, one of Antarctica's most active ice streams. 
   The airborne altimetry comprises 35,000 line-kilometers sampled at 20 meters 
   along track. The full dataset has an internal error of ±20 cm; a primary 
   subset has an error of ±8 cm. We find a +20 cm bias with Geoscience Laser 
   Altimeter System data over a flat interior region. These data will serve as an 
   additional temporal reference for the evolution of Thwaites Glacier surface, 
   as well as aid the construction of future high resolution Digital Elevation 
   Models (DEM). Line data are available in space-delimited ASCII format and are 
   available via FTP.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/agdc/index.html
   Description: AGDC Web Site
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/agdc/index.html
   Description: Antarctic Glaciological Data Center (AGDC) home page.
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://www.ig.utexas.edu/research/projects/agasea/
   Description: University of Texas, Institute for Geophysics (UTIG) Web site
End_Group
IDN_Node: AMD/US
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2008-01-01
Last_DIF_Revision_Date: 2013-10-07
Group: DIF_Revision_History

   Removed all service links and replaced them with one link to a landing page. 
   Moved A-Cap reference to guide doc. 

End_Group