Entry_ID: NSIDC-0239
Entry_Title: SMEX02 Atmospheric Aerosol Optical Properties Data
Group: Data_Set_Citation
   Dataset_Creator: Walthall, C. L. 
   Dataset_Title: SMEX02 Atmospheric Aerosol Optical Properties Data
   Dataset_Release_Date: 2003-10-20
   Dataset_Release_Place: Landover, Maryland USA
   Dataset_Publisher: Goddard: NASA Goddard Space Flight Center
   Online_Resource: http://nsidc.org/data/nsidc-0239.html
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Charles
   Middle_Name: L.
   Last_Name: Walthall
   Group: Contact_Address
      Address: US Department of Agriculture (USDA)
      Address: ARS-Hydrology and Remote Sensing Laboratory
      Address: Rm 104 Bldg 007 BARC-West
      City: Beltsville
      Province_or_State: MD
      Postal_Code: 20705
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Wayne
   Middle_Name: P.
   Last_Name: Dulaney
   Group: Contact_Address
      Address: US Department of Agriculture (USDA)
      Address: ARS-Hydrology and Remote Sensing Laboratory
      Address: Rm 104 Bldg 007 BARC-West
      City: Beltsville
      Province_or_State: MD
      Postal_Code: 20705
   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: Atmosphere
   Term: Aerosols
   Variable_Level_1: Aerosol Optical Depth/Thickness
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Aerosols
   Variable_Level_1: Aerosol Particle Properties
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Aerosols
   Variable_Level_1: Aerosol Radiance
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Atmospheric Water Vapor
   Variable_Level_1: Precipitable Water
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Atmosphere
   Term: Precipitation
   Variable_Level_1: Precipitation Rate
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Spectral/Engineering
   Term: Visible Wavelengths
   Variable_Level_1: Visible Radiance
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
Keyword: Aerosols
Keyword: Precipitable Water
Keyword: Precipitation
Keyword: Precipitation Amount
Keyword: Radiance
Keyword: SMEX
Keyword: Total Precipitation
Sensor_Name: AEROSOL/CLOUD PARTICLE SIZER
Sensor_Name: AEROSOL MONITOR
Sensor_Name: RADIOMETERS
Sensor_Name: SPECTRORADIOMETERS
Source_Name: GROUND STATIONS
Group: Temporal_Coverage
   Start_Date: 2002-06-19
   Stop_Date: 2002-07-18
End_Group
Data_Set_Progress: complete
Group: Location
   Location_Category: CONTINENT
   Location_Type: NORTH AMERICA
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: NORTH AMERICA
   Location_Subregion1: UNITED STATES OF AMERICA
   Detailed_Location: IOWA
End_Group
Project: SMEX02 > Soil Moisture Experiments in 2002
Data_Set_Language: English
Originating_Center: NASA/GSFC/SED/ESD/HBSL/HSB
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_Format: ASCII Text (.txt)
End_Group
Group: Summary

   This data set consists of observations of atmospheric parameters including 
   spectral aerosol optical depths, precipitable water, sky radiance 
   distributions and aerosol volume, and particle size distribution. Data were 
   collected by the Aerosol Robotic Network (AERONET) program, a federation of 
   ground-based remote sensing aerosol networks composed of automatic sun and sky 
   scanning radiometers. AERONET's goal is to assess aerosol optical properties 
   and validate satellite data. The study site was in the Soil Moisture 
   Experiment 2002 (SMEX02) area of Iowa, USA for the period from 20 June to 17 
   July 2002. 

   A sun photometer was set up at a centrally located site within the Walnut 
   Creek watershed for the collection of aerosol optical properties throughout 
   the course of the SMEX02 field campaign.  Three levels of data are available: 
   Level 1.0 (unscreened), Level 1.5 (cloud-screened), and Level 2.0 
   (cloud-screened and quality-assured).

   These data were collected as part of a validation study for the Advanced 
   Microwave Scanning Radiometer - Earth Observing System (AMSR-E). AMSR-E is a 
   mission instrument launched aboard NASA's Aqua Satellite on 04 May 2002. 
   AMSR-E validation studies linked to SMEX are designed to evaluate the accuracy 
   of AMSR-E soil moisture data. Specific validation objectives include assessing 
   and refining soil moisture algorithm performance; verifying soil moisture 
   estimation accuracy; investigating the effects of vegetation, surface 
   temperature, topography, and soil texture on soil moisture accuracy; and 
   determining the regions that are useful for AMSR-E soil moisture measurements.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://aeronet.gsfc.nasa.gov/index.html
   Description: AERONET site
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/data/amsr_validation/
   Description: NSIDC AMSR-E Validation
End_Group
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2003-10-20
Last_DIF_Revision_Date: 2013-07-03
DIF_Revision_History:  updated version and creator