Further Considerations in Models of Rough Surface Scattering
Abstract
Several models have been developed to calculate the coherent (specular plus direct) and incoherent multipath power reaching a monopulse receiver from a beacon located over rough terrain. These models are based upon physical optics and include both Gaussian and exponential statistical distributions in surface heights. The theoretical models relate statistical parameters describing the surface to the normalized scattering cross section of the surface. This report is concerned with three topics, in each of which characteristics of the scattering from the surface depend on the degree of roughness. The first is the changes in form of the mathematical representation for normalized scattering cross sections as the degree of roughness is varied. The next topic is concerned with alternative definitions of the glistening surface (the part of the rough surface from which diffuse power is scattered into the receiver). It is shown that, for some parameter ranges, the usual definition of glistening surface as given by Beckmann and Spizzichino is not adequate. In the final topic, the effect of the moisture content of the soil on surface scattering as a function of roughness is discussed. A wide range of results is presented in each of these areas. The implications of these findings for the prediction of system performance are discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 04, 1982
- Accession Number
- ADA130424
Entities
People
- John F. Lennon
- Richard L. Taylor
- Robert J. Papa
Organizations
- Rome Laboratory