Accession Number : ADA308451

Title :   New Computational Analytical Methods for Scattering and Propagation in Random Media.

Descriptive Note : Final rept. 1 Jul 92-31 Oct 95,

Corporate Author : VISTA RESEARCH INC MOUNTAIN VIEW CA

Personal Author(s) : Rino, Charles L. ; Ngo, Hoc D.

PDF Url : ADA308451

Report Date : 31 DEC 1995

Pagination or Media Count : 11

Abstract : Scattering in inhomogeneous environments with irregular boundaries has ramifications for a number of practical problems of interest to the U. S. Army and other government agencies. Subdividing the problem into smaller and thereby more easily managed units has been successfully exploited. Under this grant new methods were developed that are particularly well suited to highly directed propagation. Propagation at low grazing angles relative to the boundary affords further simplification when backscatter can be neglected all together. New computation methods have been developed that can be used in place of the parabolic-wave-equation methods which remain restricted to low grazing angles.

Descriptors :   *NUMERICAL METHODS AND PROCEDURES, MATHEMATICAL MODELS, ALGORITHMS, FOURIER TRANSFORMATION, ACOUSTIC WAVES, BACKSCATTERING, WAVE PROPAGATION, APPROXIMATION(MATHEMATICS), PARTIAL DIFFERENTIAL EQUATIONS, PERTURBATIONS, ACOUSTIC SCATTERING, APPLIED MATHEMATICS, GRAZING.

Subject Categories : Numerical Mathematics
      Operations Research

Distribution Statement : APPROVED FOR PUBLIC RELEASE