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United States Department of Agriculture

Agricultural Research Service

Title: Soil Moisture Mapping Using Passive Microwave Measurements and GIS

item Jackson, Thomas

Submitted to: Geospatial Information in Agriculture and Forestry International Conference
Publication Type: Proceedings
Publication Acceptance Date: January 19, 2000
Publication Date: N/A

Technical Abstract: Soil moisture is very important in hydrology, agriculture and land management. Soil moisture is difficult to measure using conventional methods. Remote sensing has a great potential for providing areal estimates of soil moisture. An example of aircraft mapping of soil moisture was conducted using the Electronically Scanned Thinned Array Radiometer (ESTAR). This passive microwave radiometer, operating at center frequency of 1.415 GHz (L band) measures brightness temperature. ESTAR produces a spatially distributed map product, which is compatible with Geographic Information System. The algorithm for retrieving soil moisture required soil brightness images and the use of ancillary environmental data, with different original grids and coordinate systems. The GIS enables these algorithm calculations. Maps showing spatial and temporal soil moisture variations during the time of the experiment (June 18 to July 14 1997) were produced. Data coming form the aircraft measurements offer a quick estimate of soil moisture conditions.

Last Modified: 4/22/2015
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