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Proceedings Paper

Microwave Remote Sensing Of Soil Moisture
Author(s): Thomas J. Schmugge
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Paper Abstract

Because of the large contrast between the dielectric constant of liquid water and that of dry soil at microwave wavelength, there is a strong dependence of the thermal emission and radar backscatter from the soil on its moisture content. This dependence provides a means for the remote sensing of the moisture content in a surface layer approximately 5 cm thick. The feasibility of these techniques has been demonstrated from field, aircraft and spacecraft platforms. The soil texture, surface roughness, and vegetative cover affect the sensitivity of the microwave response to moisture variations with vegetation being the most important. It serves as an attenuating layer which can totally obscure the surface. Research has indicated that it is possible to obtain 5 or more levels of moisture discrimination and that a mature corn crop is the limiting vegetation situation.

Paper Details

Date Published: 1 August 1984
PDF: 9 pages
Proc. SPIE 0481, Recent Advances in Civil Space Remote Sensing, (1 August 1984); doi: 10.1117/12.943093
Show Author Affiliations
Thomas J. Schmugge, NASA/Goddard Space Flight Center (United States)


Published in SPIE Proceedings Vol. 0481:
Recent Advances in Civil Space Remote Sensing

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