Forward propagation in a half-space with an irregular boundary

Rino, C. L.; Ngo, Hoc D.

doi:10.1109/8.623122

Cited by 17 publications

(10 citation statements)

References 14 publications

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“…Let us recall that the main point of interest of the proposed approach by comparison to more rigorous methods based on the method of moments [3][4][5], is the computing time and the memory space. The technique presented in this paper is useful for those who are trying to model long range radar propagation above rough ocean surfaces by taking into account the refraction atmosphere effects and the surface roughness.…”

Section: Resultsmentioning

confidence: 99%

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Forward Propagation Modeling Above Gaussian Rough Surfaces by the Parabolic Shadowing Effect

Fabbro¹,

Bourlier²,

Combes³

2006

PIER

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Abstract-In this paper, a fast method is presented to model the forward propagation above Gaussian rough surfaces and taking into account atmospheric refraction. The method is based on the Discrete Mixed Fourier Transform (DMFT) solved by the Parabolic Wave Equation, in which the Ament boundary condition with shadowing effect is used at grazing angle.In this model, for a bistatic configuration, the surface height PDF of the illuminated points is derived and it is introduced in the boundary condition. Examples demonstrate the capacities of the method to compute propagation factor above rough surfaces following Gaussian statistics and Gaussian height correlation and the proposed method is validated by comparison to a Monte Carlo approach.

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Section: Resultsmentioning

confidence: 99%

“…To solve rigorously the electromagnetic scattering problem from rough surfaces, computational methods based on method of moments [3][4][5], could be applied; but these techniques are very time consuming and it is not the purpose of this paper.…”

Section: Introductionmentioning

confidence: 99%

Forward Propagation Modeling Above Gaussian Rough Surfaces by the Parabolic Shadowing Effect

Fabbro¹,

Bourlier²,

Combes³

2006

PIER

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“…Their rigorous method facilitated the calculation of backscattered fields in such environments. The RNK novel approach [ Rino and Ngo , 1997; Rino and Kruger , 2001] greatly enhanced the numerical tractability of the BIE/MOMI modeling of forward propagation over 1D surfaces by dividing the propagation domain into vertical slabs, each bounded from below by a portion of the rough surface. MOMI is used to calculate the surface current induced on each surface portion, and the scattered field due to these currents is then calculated and combined with the freely propagated field at the end of the propagation slab to obtain the total propagated field.…”

Section: Introductionmentioning

confidence: 99%

“…The process is repeated as the forward marching of the field continues. Although the RNK model is general, the published formalism [ Rino and Ngo , 1997; Rino and Kruger , 2001] is limited to perfectly electric conducting (PEC) surfaces. For horizontally polarized (H‐POL) propagation, Rino and Kruger compared the RNK results to those obtained by a simplified version of the linear shift map (LSM) scheme (used in PE‐based schemes).…”

Section: Introductionmentioning

confidence: 99%

An accelerated boundary integral equation scheme for propagation over the ocean surface

2002

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[1] In two recent papers, C. L. Rino, H. Ngo and V. Kruger (RNK) proposed a novel scheme for tropospheric propagation over one-dimensional (1D) terrain or ocean surfaces. This scheme is based on a boundary integral equation (BIE) formalism, the iterative solution of which is carried out efficiently via the method of ordered multiple interactions (MOMI). An important merit of the RNK scheme is the fact that, being a BIE-based model, it rigorously accounts for the effect of the multiple-scale ocean surface roughness on the propagated field. In their most recent paper, C. L. Rino and V. Kruger suggested that the accelerated version of MOMI proposed by H.-T. Chou and J. T. Johnson (MOMI/ CJ) could substantially enhance the efficiency of their scheme. Motivated by this suggestion, this paper proposes a combined RNK/CJ algorithm for propagation over finitely conducting (FC) ocean surfaces. While maintaining its accuracy, the proposed scheme enhances the computational efficiency of the rigorous RNK model by reducing the number of mathematical operations needed in the iterative solution of the governing BIE.INDEX TERMS: 6964 Radio Science: Radio wave propagation; 0659 Electromagnetics: Random media and rough surfaces; 0644 Electromagnetics: Numerical methods; KEYWORDS: wave propagation, rough surface scattering, integral equation methods, fast numerical algorithms Citation: Awadallah, R. S., M. T. Lamar, and J. R. Kuttler, An accelerated boundary integral equation scheme for propagation over the ocean surface,

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“…The serious drawback of ray-optical methods is the computational complexity. Another kind of deterministic methods that has been studied extensively are those derived from the parabolic wave equation (PWE) approximation to the Helmholtz equation, in both integral and differential forms [12]- [14]. The PWE method is useful in problems where the energy is expected to propagate dominantly in a particular direction.…”

Section: Propagation Prediction Approachesmentioning

confidence: 99%

Application of the spectral acceleration forward-backward method for propagation over terrain

Tunc¹

2004

Fifth IEE International Conference on Computation in Electromagnetics - CEM 2004

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Forward propagation in a half-space with an irregular boundary

Cited by 17 publications

References 14 publications

Forward Propagation Modeling Above Gaussian Rough Surfaces by the Parabolic Shadowing Effect

Forward Propagation Modeling Above Gaussian Rough Surfaces by the Parabolic Shadowing Effect

An accelerated boundary integral equation scheme for propagation over the ocean surface

Application of the spectral acceleration forward-backward method for propagation over terrain

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