Polarimetric signatures of a forested canopy

Author

Karam, M.A. ; Amar, F. ; Fung, A.K.

Author_Institution

Dept. of Electr. Eng., Texas Univ., Arlington, TX, USA

fYear

1992

fDate

18-25 June 1992

Firstpage

830

Abstract

A microwave signature model based on the vector radiative transfer equation has been developed for a forested canopy. The model is designed to operate over a wide frequency band and to account for the size and orientation distributions of each forest component, the layering effect, and multiple scattering. The average Muller matrix is formulated in terms of the iterative solution of the radiative transfer solution up to the second order in albedo and then used to determine the co-polarized and cross-polarized power returns. Numerical results show that a significant difference exists in the polarimetric signatures of a forested canopy when the crown region is treated as two layers versus one layer with the same leaf and branch distributions.<>

Keywords

electromagnetic wave polarisation; matrix algebra; microwaves; radiowave propagation; transfer functions; average Muller matrix; branch distributions; co-polarised power returns; cross-polarized power returns; crown region; forest component; forested canopy; iterative solution; layering effect; leaf distributions; microwave signature model; multiple scattering; orientation distributions; polarimetric signatures; radiative transfer solution; second order; size distributions; vector radiative transfer equation; wide frequency band; Dielectrics; Directive antennas; Engine cylinders; Equations; Frequency; Lead; Needles; Polarization; Scattering parameters; Stokes parameters;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1992. AP-S. 1992 Digest. Held in Conjuction with: URSI Radio Science Meeting and Nuclear EMP Meeting., IEEE

Conference_Location

Chicago, IL, USA

Print_ISBN

0-7803-0730-5

Type

conf

DOI

10.1109/APS.1992.221673

Filename

221673