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Microwave Remote Sensing of Soil Moisture for Estimation of Soil PropertiesSurface soil moisture dynamics was derived using microwave remote sensing, and employed to estimate soil physical and hydraulic properties. The L-band ESTAR radiometer was employed in an airborne campaign over the Little Washita watershed, Oklahoma during June 10-18, 1992. Brightness temperature (TB) data were employed in a soil moisture inversion algorithm which corrected for vegetation and soil effects. Analyses of spatial TB and soil moisture dynamics during the dry-down period revealed a direct relationship between changes in TB, soil moisture and soil texture. Extensive regression analyses were carried out which yielded statistically significant quantitative relationships between ratio of percent sand to percent clay (RSC, a term derived to quantify soil texture) and saturated hydraulic conductivity (Ksat) in terms of change components of TB and surface soil moisture. Validation of results indicated that both RSC and Ksat can be estimated with reasonable accuracy. These findings have potential applications for deriving spatial distributions of RSC and Ksat over large areas.
Document ID
20000038131
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Mattikalli, Nandish M.
(Hughes STX, Inc. Greenbelt, MD United States)
Engman, Edwin T.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Jackson, Thomas J.
(Agricultural Research Service Beltsville, MD United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1997
Publication Information
Publication: Laboratory for Hydrospheric Processes Research Publications
Subject Category
Earth Resources And Remote Sensing
Report/Patent Number
IEEE-97CH36042
LC-97-70575
Meeting Information
Meeting: Geoscience and Remote Sensing
Location: Singapore
Country: Singapore
Start Date: August 3, 1997
End Date: August 8, 1997
Distribution Limits
Public
Copyright
Other

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