LINE-OF-SIGHT PROPAGATION EXPERIMENTATION AND MODELING FOR PARTIALLY ILLUMINATED TERRAIN
Abstract
A series of experiments was conducted to evaluate a model that predicts line-of-sight (LOS) propagation loss over partially illuminated terrain. Height-gain measurements were made at the receiver for a number of paths of varying irregularity, roughness, and vegetation cover. The measurements indicate that two regions must be recognized: the first, below 500 Mc, where specular effects are predominant and the specular reflection coefficient varies from approximately 0.20 to unity; and the second, above 500 Mc, where both the specular and the diffuse reflection coefficients generally range from 0.20 to 0.40. Appropriate changes have been made in the original LOS model to reflect more accurately the propagation effects in these two regions over the frequency range of interest, 40 Mc to 20 Gc.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1965
- Accession Number
- AD0643318
Entities
People
- Harry N. Gitterman
- Samuel N. Watkins
Organizations
- Sylvania Electric Products