NDLI: Soil moisture mapping at regional scales using microwave radiometry: the Southern Great Plains Hydrology Experiment

Content Provider	IEEE Xplore Digital Library
Author	Jackson, T.J. Le Vine, D.M. Hsu, A.Y. Oldak, A. Starks, P.J. Swift, C.T. Isham, J.D. Haken, M.
Copyright Year	1980
Abstract	Surface soil moisture retrieval algorithms based on passive microwave observations, developed and verified at high spatial resolution, were evaluated in a regional scale experiment. Using previous investigations as a base, the Southern Great Plains Hydrology Experiment (SGP97) was designed and conducted to extend the algorithm to coarser resolutions, larger regions with more diverse conditions, and longer time periods. The L-band electronically scanned thinned array radiometer (ESTAR) was used for daily mapping of surface soil moisture over an area greater than 10000 km/sup 2/ for a one month period. Results show that the soil moisture retrieval algorithm performed the same as in previous investigations, demonstrating consistency of both the retrieval and the instrument. Error levels were on the order of 3% for area Integrated averages of sites used for validation. This result showed that for the coarser resolution used that the theory and techniques employed in the algorithm apply at this scale. Spatial patterns observed in the Little Washita Watershed in previous investigations were also observed. These results showed that soil texture dominated the spatial pattern at this scale. However, the regional soil moisture patterns were a reflection of the spatially variable rainfall and soil texture patterns were not as obvious.
Sponsorship	IEEE Geoscience and Remote Sensing Society IEEE URSI
Starting Page	2136
Ending Page	2151
Page Count	16
File Size	2194280
File Format	PDF
ISSN	01962892
Volume Number	37
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Soil moisture Spatial resolution Surface soil Soil texture Hydrology Algorithm design and analysis L-band Microwave radiometry Instruments Reflection
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Electrical and Electronic Engineering

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