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Journal article
The method of the local parabolic approximation for rough surface scattering
The Journal of the Acoustical Society of America., Vol.94(4), pp.2326-2333
10/1993
Handle:
https://hdl.handle.net/2376/5990
Abstract
A method for evaluation of scattering from rough surfaces which is similar to the Kirchhoff approximation is considered. However, it is based on a local parabolic approximation of the surface irregularities rather than a tangent plane approximation and two iterations of the surface field integral equation. The method, first proposed by Belobrov and Fuks [Izv. VUZ Radiofiz. 29, 1083-1089 (1986); Sov. Phys. Acoust.3 1, 442-445 (1985)], accounts for local diffraction effects. Important modifications to the original method are introduced and extensive numerical results for Gaussian one-dimensional randomly rough surfaces for both the Dirichlet and Neumann problems are provided. The validity of the local parabolic approximation is assessed by comparison with results from Monte Carlo simulations. It is demonstrated that the local parabolic approximation improves the Kirchhoff approximation for large and intermediate values of the surface correlation length especially in the backscattering region.
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Details
- Title
- The method of the local parabolic approximation for rough surface scattering
- Creators
- Kristink Ivanova (Author)Shira L. Broschat (Author)
- Publication Details
- The Journal of the Acoustical Society of America., Vol.94(4), pp.2326-2333
- Academic Unit
- Electrical Engineering and Computer Science, School of
- Identifiers
- 99900502689101842
- Copyright
- In copyright ; openAccess ; http://rightsstatements.org/vocab/InC/1.0/ ; http://purl.org/eprint/accessRights/OpenAccess
- Language
- English
- Resource Type
- Journal article