Accession Number:

ADA229755

Title:

Scattering and Depolarization by Rough Sea Unified Full Wave Approach

Descriptive Note:

Final rept. 1 May 1987-1 Oct 1990

Corporate Author:

NEBRASKA UNIV LINCOLN DEPT OF ELECTRICAL ENGINEERING

Personal Author(s):

Report Date:

1990-11-30

Pagination or Media Count:

88.0

Abstract:

Some of the research results are 1 Computer simulation of synthetic aperture radar polarimetric images or rough sea with swell were obtained for an individual resolution cell. 2 Two separate approaches were developed to account for multiple scatter from rough surfaces. 3 In the high frequency limit shadowing is accounted for by limiting the angles of incidence and scatter to less than 90 deg. This is self-shadow. 4 Non Gaussian probability density functions are considered. These are based on the gamma functions of order K. 5 To determine rough surface cross sections, Gaussian and non Gaussian spectral density functions have been considered. 6 The medium below the rough interface is characterized by complex permittivity and permeability so that conduction currents and displacement currents are accounted for. 7 Random rough surfaces are characterized by 4D Gaussian joint probability density functions. 8 At oblique angles single scatter is the principle contributor to the observed enhanced backscatter. Keywords Electromagnetic scatteringspectra Backscattering Electromagnetic wave propagations Spectral energy distribution Polarimetryoptical images Optical cross sections Ocean surfacesroughness Perturbation theory Computerized simulation.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Optics
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE