SMEX04 Vegetation Water Content Data  View Catalog Page Entry ID
NSIDC-0391
Summary
Notice to Data Users: The documentation for this data set was provided solely by the Principal Investigator(s) and was not further developed, thoroughly reviewed, or edited by NSIDC. Thus, support for this data set may be limited.
This data set consists of Vegetation Water Content (VWC) data for two Soil Moisture Experiment 2004 (SMEX04) regional study areas: Arizona, USA and Sonora, Mexico. VWC was derived from the Normalized Difference Infrared Index (NDII) which was obtained from Landsat 5 Thematic Mapper (TM) imagery on 29 July 2004 and 30 August 2004. From these overpass images, daily images were generated by linearly interpolating each scene between the nearest available scenes. Individual data values must be divided by 100 to obtain the actual vegetation water content in kg/m2. The total volume for this data set is approximately 3.2 gigabytes. Data are provided as binary files and are available via FTP.
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.
Geographic Coverage
Spatial Coordinates:
N: 32.69°
S: 29.33°
E: -108.56°
W: -111.4°
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Data Set Citation
Dataset Creator: Cosh, Michael H., E. Raymond Hunt Jr., Thomas J. Jackson, and Tugrul M. Yilmaz
Dataset Title: SMEX04 Vegetation Water Content Data
Dataset Release Date: 2009-05-15
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/nsidc-0391.html
Temporal Coverage
Start Date: 2004-07-29
Stop Date: 2004-08-30
Location Keywords
- CONTINENT NORTH AMERICA MEXICO
- CONTINENT NORTH AMERICA UNITED STATES OF AMERICA ARIZONA
Science Keywords
- Biosphere Vegetation Vegetation Cover
- Biosphere Vegetation Vegetation Index
Ancillary Keywords
- AMSR-E
- Landsat-5
- NASA
- NSIDC
- NSIDC DAAC
- SMEX
- Surface Soil Moisture
- Vegetation Water Content
- Climatology/Meteorology/Atmosphere
Platform
Instrument
- TM Thematic Mapper
Project
- SMEX04 Soil Moisture Experiments in 2004
Quality
The pixel resolution of the Landsat 5 Thematic Mapper (TM) instrument is 30 m by 30 m, but the sampling size of Vegetation Water Content (VWC) at the surface is less than 1 m2. Also, though field data were collected for the duration of the experiment from 29 July to 30 August 2004, only two days of satellite data were available during the study period: 29 July 2004 and 30 August 2004, the first and last days of the experiment. Some error in comparing ground data to satellite imagery was therefore unavoidable.
Data Set Progress
complete
Originating Center
NSIDC_DAAC
Data Center
NASA DAAC at the National Snow and Ice Data Center
Data Center URL: http://nsidc.org/daac/index.html
Data Center Personnel
Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:
- National Snow and Ice Data Center
- CIRES, 449 UCB
- University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
National Snow and Ice Data Center
Data Center URL: http://nsidc.org
Data Center Personnel
Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:
- National Snow and Ice Data Center
- CIRES, 449 UCB
- University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
Distribution
Distribution Media: FTP
Distribution Size: 100 MB
Distribution Format: Binary
Personnel
Michael Cosh
Role: INVESTIGATOR
Phone: 1 301 504-6461
Fax: 1 301 504-8931
Email: mcosh@hydrolab.arsusda.gov
Contact Address:
- U.S. Department of Agriculture
- USDA ARS Hydrology Lab
- USDA ARS Hydrology Lab
- 104 Bldg. 007
- BARC-West
City: Beltsville
Province or State: MD
Postal Code: 20705
Country: USA
E. Raymond Hunt, Jr.
Role: INVESTIGATOR
Email: erhunt@hydrolab.arsusda.gov
Contact Address:
- United States Department of Agriculture
- ARS Hydrology and Remote Sensing Laboratory
- Rm 104 Bldg 007 BARC-West
City: Beltsville
Province or State: MD
Postal Code: 20705
Country: USA
NSIDC User Services
Role: TECHNICAL CONTACT
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:
- National Snow and Ice Data Center
- CIRES, 449 UCB
- University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
Thomas Jackson
Role: INVESTIGATOR
Phone: 1 301 504-8511
Fax: 1 301 504-8931
Email: tjackson@hydrolab.arsusda.gov
Contact Address:
- U.S. Department of Agriculture
- ARS Hydrology Lab
- USDA ARS Hydrology Lab
- 104 Bldg. 007
- BARC-West
City: Beltsville
Province or State: MD
Postal Code: 20705
Country: USA
M. Tugrul Yilmaz
Role: INVESTIGATOR
Contact Address:
- United States Department of Agriculture
- ARS Hydrology and Remote Sensing Laboratory
City: Beltsville
Province or State: MD
Postal Code: 20705
Country: USA
Related URL
VIEW PROJECT HOME PAGE
AMSR-E/Aqua Data
VIEW PROJECT HOME PAGE
AMSR-E Validation Data
Reference
Please visit the USDA SMEX04 Web site (http://hydrolab.arsusda.gov/smex04/) for in-depth information on the science mission and goal of the SMEX project.
Metadata Name and Version
Metadata Name: CEOS IDN DIF
Metadata Version: 9.7
Creation and Review Dates
DIF Creation Date: 2009-05-15
Last DIF Revision Date: 2012-07-16
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