Bistatic Clutter RCS Simulation Using Scale Model Surfaces with Two Scale Roughness
Abstract
Bistatic scattering cross section measurements of CO2 laser radiation from slightly roughened metallic surfaces were made and compared to the predictions of the Rice theory. Co-pol and cross pol measurements were performed both in and out of the plane of incidence. The incident radiation was linearly polarized in either the H or V configuration, perpendicular and parallel to the plane of incidence, respectively. For each state of incident polarization the scattered polarization was analyzed along two directions, perpendicular, (HH) and (HV), and parallel, (HV) and (VV), to the scattering plane. The Rice theory predicts the polarization dependent scattering cross section from a roughened surface with small scale roughness. Small scale roughness is defined in terms of h/lambda, where h is the rms value of the randomly distributed surface depths and lambda the wavelength of the incident radiation. A roughened surface with h/ lambda < 1/2Pi is considered to be small scale. The aluminum surfaces that were prepared for targets all satisfied the criteria for small scale roughness. The rms depth was obtained from specular reflection data which was fitted to the Davies formula, and the average slopes were obtained from profilometric traces.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 29, 1993
- Accession Number
- ADA277604
Entities
People
- C. Laramee
- G. Phillips
- Julia Waldman
- Zoltan Fried
Organizations
- University of Massachusetts Lowell