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 ancillary
data set consists of geographic coordinates for the Soil Moisture Experiment 2003 (SMEX03). Geolocation information is provided
for SMEX03 rainfall network and gravimetric sampling locations conducted in the regional study area of Georgia, USA. Geolocation
information is also provided for rain gauge sites in the Little River (LR) micronet located within the state of Georgia. Coordinates
were obtained 1 July 2003 using Global Positioning System (GPS) measurements. The volume of the data set is approximately
30 kilobytes. Data are provided in one tab-delimited ASCII text file and one Microsoft Excel file, 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.
Please visit the USDA SMEX03 Web site (http://hydrolab.arsusda.gov/smex03/) for in-depth information on the science mission
and goal of the SMEX project.