National Snow & Ice Data Center Distributed Active Archive Center

nasa-nsidcdaac-0417

SMEX04 ENVISAT ASAR Data: Arizona

This data set is comprised of browse images acquired over the regional study area of Arizona, USA for the 2004 Soil Moisture Experiment (SMEX04). The experiment was conducted using the Advanced Synthetic Aperture Radar (ASAR) instrument on board the European Space Agency's (ESA) Environmental Satellite (ENVISAT). Cross-polarized C-band ASAR images were acquired for 09 September 2003 and 14 October 2003 in order to obtain a backscatter coefficient measurement over a range of natural vegetation types. However, the images provided here are only browse images and therefore cannot be used to derive backscatter coefficient values. Researchers interested in backscatter coefficient values must obtain the ASAR data. The total volume for this data set is approximately 8.3 megabytes. Data are available via FTP and are provided as JPEG image files. Also included and available via FTP are the following types of header files: HAN files, ASCII text files, and one INI file. 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.

nsidc.org

http://nsidc.org/data/NSIDC-0417

Identified by : NSIDC-0417

This dataset was released on August 18, 2009.

The time range for this dataset is September 09, 2003 to September 09, 2003.

The spatial range for this dataset is 31.41° to 32.57° latitude, and -110.31° to -109.01° longitude. map (center)

This dataset uses data from an instance of the advanced-synthetic-aperture-radar instrument on the environmental-satellite platform.
DOI : 10.5067/T2HZFZ7BX0WX
Also known as :

• dataset oai:nsidc/NSIDC-0417 (nsidc lexicon)