Entry_ID: NSIDC-0158
Entry_Title: CLPX Airborne Gamma Snow and Soil Moisture Surveys
Group: Data_Set_Citation
   Dataset_Creator: Cline, D. and T. Carroll. 
   Dataset_Title: CLPX Airborne Gamma Snow and Soil Moisture Surveys
   Dataset_Release_Date: 2005-02-04
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC DAAC: NASA DAAC at the National Snow and Ice Data Center
   Online_Resource: http://nsidc.org/data/nsidc-0158.html
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Don
   Last_Name: Cline
   Email: cline@nohrsc.nws.gov
   Phone: 1 952 361 6610 x252
   Fax: 1 952  361 6634 
   Group: Contact_Address
      Address: NOHRSC
      Address: National Weather Service
      Address: National Operational Hydrologic Remote Sensing Center
      Address: 1735 Lake Drive W.
      City: Chanhassen
      Province_or_State: MN
      Postal_Code: 55317
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Don
   Last_Name: Cline
   Email: cline@nohrsc.nws.gov
   Phone: 1 952 361 6610 x252
   Fax: 1 952  361 6634 
   Group: Contact_Address
      Address: NOHRSC
      Address: National Weather Service
      Address: National Operational Hydrologic Remote Sensing Center
      Address: 1735 Lake Drive W.
      City: Chanhassen
      Province_or_State: MN
      Postal_Code: 55317
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Tom
   Last_Name: Carroll
   Group: Contact_Address
      Address: National Weather Service
      Address: National Operational Hydrologic Remote Sensing Center
      Address: National Weather Service
      Address: National Operational Hydrologic Remote Sensing Center
      Address: 1735 Lake Drive W.
      City: Chanhassen
      Province_or_State: MN
      Postal_Code: 55317
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Technical Contact
   First_Name: NSIDC
   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
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Cover
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Water Equivalent
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Land Surface
   Term: Soils
   Variable_Level_1: Soil Moisture/Water Content
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Cover
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Water Equivalent
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
Sensor_Name: GAMMA RADIATION DETECTOR
Source_Name: AIRCRAFT
Group: Temporal_Coverage
   Start_Date: 2003-03-25
   Stop_Date: 2003-03-31
End_Group
Group: Temporal_Coverage
   Start_Date: 2003-02-19
   Stop_Date: 2003-02-21
End_Group
Group: Temporal_Coverage
   Start_Date: 2002-09-17
   Stop_Date: 2002-09-17
End_Group
Group: Temporal_Coverage
   Start_Date: 2002-02-19
   Stop_Date: 2002-02-23
End_Group
Group: Temporal_Coverage
   Start_Date: 2001-09-20
   Stop_Date: 2001-09-22
End_Group
Data_Set_Progress: complete
Group: Spatial_Coverage
   Southernmost_Latitude: 39.5
   Northernmost_Latitude: 41
   Westernmost_Longitude: -107.5
   Easternmost_Longitude: -105
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: NORTH AMERICA
   Detailed_Location: COLORADO
End_Group
Group: Location
   Location_Category: GEOGRAPHIC REGION
   Location_Type: NORTHERN HEMISPHERE
End_Group
Project: CLPX > Cold Land Processes Field Experiment
Data_Set_Language: English
Group: Data_Center
   Data_Center_Name: NASA DAAC > NASA DAAC at the National Snow and Ice Data Center
   Data_Center_URL: http://nsidc.org/daac/index.html
   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: 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: Distribution
   Distribution_Media: FTP
   Distribution_Size: 13.6 MB
   Distribution_Format: ESRI Shapefiles (.shp, .shx, .dbf, and .prj)
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 13.6 MB
   Distribution_Format: ASCII Text (.txt)
End_Group
Group: Summary

   Airborne gamma surveys were conducted over each of the three Cold Land 
   Processes Field Experiment (CLPX) Meso-cell Study Areas (MSAs) in northern 
   Colorado, USA, during September 2001 and 2002, and during the three Intensive 
   Observation Periods (IOPs) in February 2002 (IOP1), February 2003 (IOP3) and 
   March 2003 (IOP4). Data collected in September 2001 and 2002 provided 
   background gamma radiation measurements necessary to calculate measurements of 
   snow water equivalent (SWE) and soil moisture during subsequent winters. 
   Airborne gamma radiation measurements of SWE and soil moisture are based on 
   the attenuation of natural terrestrial gamma radiation by the mass of water 
   contained in the soil and snow. Measurements were collected at 500 feet AGL 
   along flight lines of variable length and 300 m width. Measurements are 
   integrated along the entire length of a flight line. Flight lines in the North 
   Park MSA were each 9 km in length, with a series of three lines (27 km total 
   length) flown in a regular N-S parallel pattern spaced 1 km apart. Flight 
   lines in the Fraser and Rabbit Ears MSAs are of variable length and direction. 

   The NASA CLPX is a multi-sensor, multi-scale experiment that focuses on 
   extending a local-scale understanding of water fluxes, storage, and 
   transformations to regional and global scales. Within a framework of nested 
   study areas in the central Rocky Mountains of the western United States, 
   ranging from 1-ha to 160,000 km2, intensive ground, airborne, and spaceborne 
   observations are collected. Data collection focuses on two seasons: 
   mid-winter, when conditions are generally frozen and dry, and early spring, a 
   transitional period when both frozen and thawed, dry and wet conditions are 
   widespread.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/data/clpx/
   Description: CLPX Site
End_Group
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2005-02-04
Last_DIF_Revision_Date: 2013-06-27
DIF_Revision_History:  updated version and citation