Analysis of the Main Scattering Mechanisms in Forested Areas: An Integral Representation Approach for Monostatic Radar Configurations

Bellez, Sami; Dahon, Cyril; Roussel, H.

doi:10.1109/tgrs.2009.2023663

Cited by 21 publications

(16 citation statements)

References 30 publications

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“…where superscript T denotes the matrix transpose, and Returning to the scattering equation, Equation (19), and introducing the exact dyadic Green's function, Equation (23), and transition operator, Equation (24), the exact successive scattering formula reduces to,…”

Section: Finite Length Thin Cylindersmentioning

confidence: 99%

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A successive scattering methodology with application to two cylinders in the Fresnel region of each other

Hooker

Lang

2012

Waves in Random and Complex Media

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We present an efficient approach to compute the second-order scattering of an electromagnetic wave by two discrete scatterers in proximity to each other. Such a two-body system represents the simplest canonical arrangement to address near-field volume scattering phenomena in microwave remote sensing models of vegetation. Using an analytical wave-based approach, a successive scattering methodology is employed to derive the first interaction term in multiple scattering by two arbitrary scatterers in terms of their transition operators. The general formulation is applied to find the second-order bistatic scattering amplitude for a pair of finite length thin cylinders at arbitrary interaction distances using the exact Green's function. To improve computational efficiency, the solution is then specialized to the Fresnel region. These second-order bistatic scattering amplitude results are in agreement with the exact Green's function model when the scatterers are in the Fresnel region of each other. Additionally, it is demonstrated that using the far field approximation in the Fresnel region can yield significant deviations from the exact results. The Fresnel model, unlike the far field approximation, accurately predicts the scattering amplitude peak values and null locations, and is suited to fast solutions in realistic canopy simulations.

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Section: Finite Length Thin Cylindersmentioning

confidence: 99%

“…In practice, this approach is handled by numerical methods (e.g. [20][21][22][23]). While the multitude of numerical techniques [24][25][26] is amenable to modeling complex arrangements to a desired level of accuracy, published implementations to date have come with restrictions typical of numerically based solutions (e.g.…”

Section: Introductionmentioning

confidence: 99%

A successive scattering methodology with application to two cylinders in the Fresnel region of each other

Hooker

Lang

2012

Waves in Random and Complex Media

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“…The volume integral equation formulation can also be interpreted to extract the three physical scattering mechanisms: the Simplebounce (Sb), the Double-bounce (Db), and the Triple-bounce scattering mechanism (Tb). Further details on these scattering mechanisms are reported in [20].…”

Section: Model Formulation and Computation Processmentioning

confidence: 99%

A Rigorous Forest Scattering Model Validation Through Comparison With Indoor Bistatic Scattering Measurements

Bellez¹,

Roussel²,

Dahon³

et al. 2011

PIER B

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Abstract-In this paper, we present numerical simulations and indoor bistatic scattering measurements on scaled targets. The targets are vertical and/or tilted dielectric parallelepipeds representing the main forest elements (tree-trunks and primary branches) at VHF and low-UHF frequencies. They are placed above an aluminum circular plate to simulate a flat ground. The measurements have been conducted in the anechoic chamber of the "Centre Commun de Ressources Microondes" (CCRM) in Marseille, France. A 3D forest scattering model using a Method of Moments (MoM) is deployed to simulate the electric fields scattered by these targets. Two radar geometric, azimuthal and zenithal, bistatic configurations with special attention to the specular direction have been considered. Simulation results and experimental data are confronted for both V V -and HH-polarizations in order to evaluate the accuracy of our model. We have obtained a very good agreement between theoretical and experimental scattered fields for both the magnitude and phase.

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“…Forest scattering modeling also enables us to derive useful information about the scattering contributions of the different forest components in the frequency range under consideration. Toward this goal, a 3-D full-wave model, based on the integral representation of the electric field, has been developed at the L2E Lab (Laboratory of Electronic and Electromagnetism, UPMC, Paris) [1], to analyze the mechanism of bi-static scattering by a forest in the VHF and UHF bands. With this model, the tree trunks and branches are represented by finitelength dielectric cylinders of square cross-section and the ground is modeled by a horizontal plane.…”

Section: Introductionmentioning

confidence: 99%

Fast computing of large 3D dielectric forest scattering problems using the Characteristic Basis Function Method with the Adaptative Cross Approximation algorithm

Fenni¹,

Roussel²,

Darces³

et al. 2014

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)

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This paper presents the hybridation of the Characteristic Basis Function Method with the Adaptative Cross Approximation algorithm while generating the reduced linear equation system. The proposed method is applied to 3D scattering model in the context of forest remote sensing. It enables us to realize a significant improvement of the performances of the CBFM both in terms of memory use and CPU time while maintaining a good level of accuracy compared to the CBFM solution.

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Analysis of the Main Scattering Mechanisms in Forested Areas: An Integral Representation Approach for Monostatic Radar Configurations

Cited by 21 publications

References 30 publications

A successive scattering methodology with application to two cylinders in the Fresnel region of each other

A successive scattering methodology with application to two cylinders in the Fresnel region of each other

A Rigorous Forest Scattering Model Validation Through Comparison With Indoor Bistatic Scattering Measurements

Fast computing of large 3D dielectric forest scattering problems using the Characteristic Basis Function Method with the Adaptative Cross Approximation algorithm

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