Journal article
Exponential substitution for Kirchhoff scattering from Gaussian rough surfaces
The Journal of the Acoustical Society of America, Vol.78(3), pp.1024-1028
01/01/1985
DOI: 10.1121/1.393019
Abstract
In order to perform calculations which require many evaluations of surface-scattering cross sections, an approximation has been developed for integrals appearing in the Kirchhoff theory of rough surface scattering. This approximation replaces a two-dimensional integral evaluation by a simple function evaluation. In the radially symmetric case, evaluation of Kirchhoff cross sections is speeded by a factor of about 20. The basis of the approximation, called exponential substitution, is to fit Kirchhoff integrals by a two-parameter scaled spectrum of surface heights. M. V. Berry [J. Phys. A: Gen. Phys. 8, 566–684 (1975)] chose parameters to fit zeroth and second moments of Kirchhoff integrals whereas for this study parameters were chosen to fit the zeroth moment and peak values of the integrals. Numerical results are presented which show that the present version of exponential substitution is more accurate than previous versions in describing scattering near the forward direction. PACS numbers: 43.28.Fp
Details
- Title: Subtitle
- Exponential substitution for Kirchhoff scattering from Gaussian rough surfaces
- Creators
- David H. Berman - United States Naval Research LaboratoryJohn S. Perkins
- Resource Type
- Journal article
- Publication Details
- The Journal of the Acoustical Society of America, Vol.78(3), pp.1024-1028
- DOI
- 10.1121/1.393019
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Language
- English
- Date published
- 01/01/1985
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984627326002771
Metrics
1 Record Views