DocumentCode :
789335
Title :
The Dielectric Properties of Wet Materials
Author :
De Loor, G.Paul
Author_Institution :
Physics Laboratory TNO, The Hague, The Netherlands
Issue :
3
fYear :
1983
fDate :
7/1/1983 12:00:00 AM
Firstpage :
364
Lastpage :
369
Abstract :
In microwave remote sensing, knowledge of the dielectric properties of the materials observed (vegetation, soils) is important for the interpretation of the recorded reflection or emission and for the design of models for this reflection or emission. Although there exists no simple law which describes the properties of a heterogeneous system when the properties of its components are known, boundaries can be indicated for the permittivity of such a system. Heterogeneous systems containing water, such as wet soils and plant material, have very complex dielectric properties due to the role of the conductivity. However, at the higher microwave frequencies, in particular above the S-band, these conductivity effects play only a minor role and the free water is most important. When knowing the permittivity of wet materials the penetration depth can be determined. In all practical cases this depth is smaller than the wavelength used for the observations.
Keywords :
Conducting materials; Conductivity; Dielectric materials; Microwave frequencies; Permittivity; Reflection; Remote sensing; Soil; Vegetation; Water;
fLanguage :
English
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
Publisher :
ieee
ISSN :
0196-2892
Type :
jour
DOI :
10.1109/TGRS.1983.350567
Filename :
4157420
Link To Document :
بازگشت