Title :
Electromagnetic wave scattering from a forest or vegetation canopy: ongoing research at the University of Texas at Arlington
Author :
Karam, Mostafa A. ; Amar, F. ; Fung, Adrian K.
Author_Institution :
NASA Goddard Space Flight Center, Greenbelt, MD, USA
fDate :
4/1/1993 12:00:00 AM
Abstract :
A scattering model for forest or vegetation, based on the theory of electromagnetic wave scattering in random media, is described. The model generalizes the assumptions imposed by earlier models, and the results compare well with measurements from several forest canopies. It is shown how the model elements are integrated to obtain the scattering characteristics of different forest canopies. The scattering characteristics may be displayed in the form of polarimetric signatures, represented by like- and cross-polarized scattering coefficients, for an elliptically polarized wave, or in the form of signal distribution curves. Results illustrating both types of scattering characteristics are given.<>
Keywords :
atmospheric electromagnetic wave propagation; electromagnetic wave polarisation; electromagnetic wave scattering; Arlington; University of Texas; cross-polarized scattering coefficients; electromagnetic wave scattering; elliptically polarized wave; forest canopy; like-polarised scattering coefficients; polarimetric signatures; random media; research; scattering characteristics; scattering model; signal distribution curves; vegetation canopy; Electromagnetic modeling; Electromagnetic radiation; Electromagnetic scattering; Frequency; Optical scattering; Optical surface waves; Random media; Remote sensing; Soil; Vegetation;
Journal_Title :
Antennas and Propagation Magazine, IEEE
