Systems and methods for soil moisture estimation
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United States of America Patent
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Sep 28, 2010
Grant Date -
Jun 19, 2008
app pub date -
Dec 7, 2007
filing date -
Dec 7, 2006
priority date (Note) -
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Abstract
Embodiments of the present invention provide estimates of soil moisture by measuring the change in electrical conductivity near the surface of the earth using surface-propagated electromagnetic fields. A method is provided for estimating near-surface soil moisture, including measuring signals from an electromagnetic ground wave propagating between one or more receiving element locations, determining a transfer characteristic proportional to an average electrical conductivity between pairs of locations; and determining estimated soil moisture in one or more regions derived from analyzing the determined electrical conductivity between pairs of locations and a predetermined regional relationship between electrical conductivity and soil moisture.
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