A Theoretical Study of the Effects of Vegetation on Terrain Scattering.
Abstract
This study develops an analytical model for the scattering by a covering of vegetation on a randomly rough conducting surface. The foliage is analyzed using the Foldy-Twersky formalism for the coherent or average field and a new distorted wave born approximation (DWBA) is developed for the fluctuating field. The rough surface scattering is modeled using an interactive solution of the Magnetic Field Integral Equation (MFIE) and this approach is related to classical random surface methods. In addition, an improvement to this interactive approach is developed based on a Luneburg-Kline series for the current induced on the rough surface. The layer-on-the-surface problem is modeled by a single down and up passage of the appropriate coherent and incoherent fields as opposed to the exact solution which comprises an infinite number of passages. The key to the analysis is the conversion of all fields in the foliage to either coherent or incoherent quantities. All the important primary and secondary interactions are preserved in this model.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1988
- Accession Number
- ADA200086
Entities
People
- Gary S. Brown