Accession Number : ADA192258

Title :   Stochastic Modeling of EM Scattering from Foliage.

Descriptive Note : Interim rept. Oct 85-Oct 86,

Corporate Author : SYSTEMS ENGINEERING INC GREENBELT MD

Personal Author(s) : Blankenship, Gilmore

PDF Url : ADA192258

Report Date : Dec 1987

Pagination or Media Count : 68

Abstract : During the first year of this project, we focussed on the development and evaluation of analytical methods for the description of scattering and absorption of electromagnetic radiation by 'dense' foliage. Three different techniques are discussed in this report. The T-matrix approach to multiple scattering represents the field at an individual scattering center in terms of an 'equivalent' field produced by the other scatterers. It supports several natural approximations for this equivalent field which take multiple scattering processes into account at various levels of detail. The homogenization method is a technique for the derivation of an equivalent representation of the scattering process in terms of an asymptotic analysis of Maxwell's equations in the limit as the separation between the scattering centers approaches zero. Bounds for the effective parameter representations are also discussed. There has been some very interesting recent work in this area on the classical work of Hashin and Shtrikman. We summarize aspects of this work that relate to the problem of scattering in foliage.

Descriptors :   *ELECTROMAGNETIC SCATTERING, *STOCHASTIC PROCESSES, ABSORPTION, APPROXIMATION(MATHEMATICS), ASYMPTOTIC SERIES, DENSITY, ELECTROMAGNETIC RADIATION, FOLIAGE, HOMOGENEITY, MAXWELLS EQUATIONS, MODELS, PARAMETERS, SCATTERING

Subject Categories : Active & Passive Radar Detection & Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE