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| General Listing |
Title of Listing: | | Vegetation Index Derived from Satellite Microwave Data |
Category: | | Maps/Geographic Data |
Subcategory: | | National Aeronautics and Space Administration-NASA, All Listings |
Date: | | |
Document #: | | |
Web Site: | | http://www.fgdc.gov/FGDP/Vegetation_Index_Derived_from_Satellite_Microwave_Data.html |
Email: | | custserv@edcmail.cr.usgs.gov |
Abstract: | |
This data set is a microwave vegetation index formed from the differences of vertically and horizontally polarized brightness temperatures expressed in degrees Kelvin at 37 GHz frequency.
This data set consists of monthly composites of global Scanning Multichannel Microwave Radiometer (SMMR) observations from January 1979 to August 1987 and global Special Sensor Microwave/Imaging (SSM/I) observations from July 1987 to December 1990. No SSM/I data is available for December 1987 due to heating problems with the sensor. The global images are stored on magnetic tapes on a quarter-degree latitude-longitude grid. No spatial or temporal smoothing was performed on the data. Mixing pixels have been filled by spatial and temporal averaging. The spatial resolution of the digital data is 0.25 degrees by 0.25 degrees (latitude by longitude). The data grids are available in either a north or south polar stereographic grid.
The temperature difference data have been found to be highly correlated with the normalized difference vegetation index derived from Advanced Very High Resolution Radiometer, rainfall and drought over the Sahel, seasonal variation of atmospheric carbon dioxide concentration at Mauna Loa, land surface evaporation and primary productivity over hot arid and semi-arid regions of Africa and Australia. The data have provided information about land surface change (desertification) due to drought. Although many details of the temperature difference data require further analysis, the above correlations suggest that this data would be useful for spatial, seasonal and inter-annual studies of some biospheric processes.
Visit the EDC at http://edcwww.cr.usgs.gov/eros-home.html
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Topics
Mapping/GIS, Remote Sensing
Additional Topics/Tags/Keywords
Remotely Sensed, Satellite, Vegetation
Organization: | | National Aeronautics and Space Administration (NASA), EROS Data Center (EDC), Land Processes Distributed Active Archive Center (DAAC) |
Address: | | 47914 252nd Street
| Phone: | Description | Number |
City: | | Sioux Falls | | Primary | (605) 594-6511 |
State/Province/Territory: | | SD | 2. | | |
Zip/Postal Code: | | 57198-0001 | 3. | | |
Country: | | United States | 4. | Fax: | (605) 594-6589 |
Branch Locations: | |
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