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A Refined GTD Ray System for an Embedded Object and its Polarimetric Behavior

Marquart, Nicolas Pascal and Molinet, Frédéric and Pottier, Eric (2008) A Refined GTD Ray System for an Embedded Object and its Polarimetric Behavior. IEEE Transactions on Geoscience and Remote Sensing, pp. 2538-2546. DOI: 10.1109/TGRS.2008.916634.

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Official URL: http://www.ieeexplore.ieee.org

Abstract

A refined ray system based on the Geometrical Theory of Diffraction (GTD) for an object embedded in soil for a monostatic transmitter-receiver alignment is presented here. Apart from the investigation of the ``classical" reflections from the target, creeping waves are also taken into account and their formalism is presented. The objective of such a ray set is to better understand the different scattering mechanisms, which are presented in the complex scattering framework. In electromagnetic modelling based on GTD, a complex shape of a target is replaced by simpler canonical objects e.g. facets, cones, wedges, spheres or cylinders. Here, a cylinder is located in parallel and closely to the plane interface of two dielectrics half-spaces. In this paper, an example of air-soil is taken into analysis. The numerical results obtained from a varying incidence field are employed to describe the polarimetric characteristics of the diffracted field from grazing to perpendicular incidence for a transceiver. By representing the diffracted GTD field on the Poincaré sphere, the location on the sphere has a one-to-one relationship to the dielectric properties of the soil.

Document Type:Article
Additional Information:©2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Title:A Refined GTD Ray System for an Embedded Object and its Polarimetric Behavior
Authors:
AuthorsInstitution or Email of Authors
Marquart, Nicolas PascalUNSPECIFIED
Molinet, FrédéricMOTHESIM
Pottier, EricUniversity of Rennes 1
Date:September 2008
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
DOI:10.1109/TGRS.2008.916634
Page Range:pp. 2538-2546
Status:Published
Keywords:Geometrical Theory of Diffraction (GTD), Creeping Waves, Radar Polarimetry, Ground Penetrating Radar (GPR), Soil moisture, Mine detection
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Flugzeug-SAR (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Microwaves and Radar Institute
Deposited By: Dr. Nicolas Pascal Marquart
Deposited On:06 Oct 2008
Last Modified:12 Dec 2013 20:28

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