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Dielectric properties of soils as a function of moisture contentSoil dielectric constant measurements are reviewed and the dependence of the dielectric constant on various soil parameters is determined. Moisture content is given special attention because of its practical significance in remote sensing and because it represents the single most influential parameter as far as soil dielectric properties are concerned. Relative complex dielectric constant curves are derived as a function of volumetric soil water content at three frequencies (1.3 GHz, 4.0 GHz, and 10.0 GHz) for each of three soil textures (sand, loam, and clay). These curves, presented in both tabular and graphical form, were chosen as representative of the reported experimental data. Calculations based on these curves showed that the power reflection coefficient and emissivity, unlike skin depth, vary only slightly as a function of frequency and soil texture.
Document ID
19750018483
Document Type
Contractor Report (CR)
Authors
Cihlar, J. (Kansas Univ. Center for Research, Inc. Lawrence, KS, United States)
Ulaby, F. T. (Kansas Univ. Center for Research, Inc. Lawrence, KS, United States)
Date Acquired
September 3, 2013
Publication Date
November 1, 1974
Subject Category
GEOPHYSICS
Report/Patent Number
NASA-CR-141868
RSL-TR-177-47
Funding Number(s)
CONTRACT_GRANT: NAS9-10261
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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NameType 19750018483.pdf STI