Accession Number : ADP006888

Title :   Emissivity and Transmissivity of a Randomly Laminar Structure,

Corporate Author : MCDONNELL DOUGLAS RESEARCH LABS ST LOUIS MO

Personal Author(s) : Eftimiu, Cornel

Report Date : JUN 1991

Pagination or Media Count : 10

Abstract : We consider a randomly laminar structure of constant width and investigate the scattering of scalar waves for active remote sensing and radiometric purposes. The approach is based on analytic wave theory involving the expansion of-the field in Wiener-Hermite functionals, which are statistically orthogonal. A hierarchy of approximations is established and shown to represent in each order a partial summation of perturbation theory terms. The average field as well as the incoherently scattered field are determined, yielding the emissivity and transmissivity of the randomly laminar medium. The special case of small correlation length is examined in detail and proved to fulfill the energy conservation requirement.

Descriptors :   *RADIOMETRY, *ELECTROMAGNETIC WAVE PROPAGATION, *MICROWAVE COMMUNICATIONS, APPROACH, CONSERVATION, CONSTANTS, CORRELATION, EMISSIVITY, ENERGY, ENERGY CONSERVATION, EXPANSION, HIERARCHIES, LENGTH, PERTURBATION THEORY, PERTURBATIONS, REQUIREMENTS, SCATTERING, STRUCTURES, THEORY, TRANSMISSIVITY, WIDTH, REMOTE DETECTION, APPROXIMATION(MATHEMATICS), ENERGY LEVELS, TURBULENT BOUNDARY LAYER, REPRINTS, SYMPOSIA, LAMINAR BOUNDARY LAYER.

Subject Categories : Radiofrequency Wave Propagation
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE