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The effects of soil moisture, surface roughness, and vegetation on L-band emission and backscatterMeasurements performed with SIR-B at 1.28 GHz and an airborne multiple-beam push-broom radiometer at 1.4 GHz over agricultural fields near Fresno, California are examined. A theoretical model (Kirchhoff approximation) was used to assess the effects of surface roughness and vegetation (alfalfa and lettuce) with respect to the responses of microwave emission and backscatter to soil-moisture variations. It is found that the surface roughness plays a dominant role compared to the vegetation cover in the microwave backscatter.
Document ID
19880029892
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Wang, James R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Shiue, J. C. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Engman, Edwin T. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Schmugge, Thomas J. (USDA, Beltsville Agricultural Research Center MD, United States)
Mo, Tsan (Computer Sciences Corp. Beltsville, MD, United States)
Date Acquired
August 13, 2013
Publication Date
November 1, 1987
Publication Information
Publication: IEEE Transactions on Geoscience and Remote Sensing
Volume: GE-25
ISSN: 0196-2892
Subject Category
Earth Resources And Remote Sensing
Accession Number
88A17119
Distribution Limits
Public
Copyright
Other

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