A Full Wave Study of Radar Cross Sections of Rough Terrain.
Final rept. 24 Jun 91-31 Dec 94,
NEBRASKA UNIV LINCOLN DEPT OF ELECTRICAL ENGINEERING
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Full wave solutions are derived for the like and cross polarized electromagnetic diffuse single scattered fields from two dimensional irregular stratified media. Scattering upon reflection and transmission across random rough surfaces is considered. The surface is characterized by its joint probability density function for the heights and slopes at two points. The full wave expressions involve the heightslope correlations. The full wave results are compared with the small perturbation physicalgeometrical, numerical based on Monte Carlo simulations and experimental results. Full wave solutions for the double scatter fields and cross sections are also derived for rough surfaces that exhibit enhanced backscatter. The solutions are expressed as an interaction integral between two single scatter cross sections associated with quasi parallel and quasi antiparallel paths. The dependence of the angular width and level of the enhanced backscatter cross section on the mean square height and slope and on the mean width of a typical depression on the rough surface is determined. The results are compared with numerical and experimental data.
- Active and Passive Radar Detection and Equipment