NDLI: Inversion algorithms for the microwave remote sensing of soil moisture. experiments with swept frequency microwaves

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Inversion algorithms for the microwave remote sensing of soil moisture. experiments with swept frequency microwaves

Content Provider	NASA Technical Reports Server (NTRS)
Author	Hancock, G. D. Waite, W. P.
Copyright Year	1984
Description	Two experiments were performed employing swept frequency microwaves for the purpose of investigating the reflectivity from soil volumes containing both discontinuous and continuous changes in subsurface soil moisture content. Discontinuous moisture profiles were artificially created in the laboratory while continuous moisture profiles were induced into the soil of test plots by the environment of an agricultural field. The reflectivity for both the laboratory and field experiments was measured using bi-static reflectometers operated over the frequency ranges of 1.0 to 2.0 GHz and 4.0 to 8.0 GHz. Reflectivity models that considered the discontinuous and continuous moisture profiles within the soil volume were developed and compared with the results of the experiments. This comparison shows good agreement between the smooth surface models and the measurements. In particular the comparison of the smooth surface multi-layer model for continuous moisture profiles and the yield experiment measurements points out the sensitivity of the specular component of the scattered electromagnetic energy to the movement of moisture in the soil.
File Size	4147471
Page Count	147
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19840010658
Archival Resource Key	ark:/13960/t01020v9d
Language	English
Publisher Date	1984-03-01
Access Restriction	Open
Subject Keyword	Earth Resources And Remote Sensing Sensitivity Soil Moisture Soil Mechanics Remote Sensing Microwaves Reflectance Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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