Rock fraction effects on the interpretation of microwave emission from soils

Author

Jackson, Thomas J. ; Kostov, Kosta G. ; Saatchi, Sasan S.

Author_Institution

Beltsville Agric. Res. Center, MD, USA

Volume

30

Issue

3

fYear

1992

fDate

5/1/1992 12:00:00 AM

Firstpage

610

Lastpage

616

Abstract

The effects of the rock fraction were investigated through a combination of laboratory dielectric measurements and field observation of emissivity. A series of field measurements were conducted which included soils with (35% by volume) and without rocks. Analysis focused on the use of a 21-cm wavelength, although some field observations at 6 cm were also made. For the rock samples, the average values of the dielectric constant were 4.7 and 0.07 for the real and imaginary parts, respectively. The effects of rock fraction are not significant in estimating the sample soil moisture when 21-cm data are used, for the rock fraction examined. Data collected at 6 cm clearly showed that the presence of rocks will make this and shorter wavelengths useless as soil moisture sensors

Keywords

geophysical techniques; hydrological techniques; moisture measurement; remote sensing; soil; 210 cm; 6 cm; dielectric constant; emissivity; hydrology; measurement; microwave emission; moisture; radiometry; remote sensing; rock fraction effect; soil; technique; water content; Dielectric constant; Dielectric measurements; Integrated circuit modeling; Laboratories; Microwave measurements; Soil measurements; Soil moisture; Soil properties; Surface soil; Water;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing, IEEE Transactions on

Publisher

ieee

ISSN

0196-2892

Type

jour

DOI

10.1109/36.142939

Filename

142939