TROPICAL PROPAGATION RESEARCH.
Abstract
Previous reports have dealt with the experimental and theoretical aspects of the program leading up to the beginning of field measurements for radio wave propagation in a vegetat d area in Thailand. This area is about 30 miles square and has been selected to provide terrain of various degrees of roughness largely covered by dense tropical vegetation. This report presents results from the field measurements made through May 1964. The field data has been reduced to graphic form, generally in terms of basic transmission loss as a function of distance and antenna height. Certain auxiliary data, such as path profile data and refractive index data, is also reported. The field data obtained from the measurements at 100 megacycles has been analyzed extensively by comparing the measured data with the theoretical data calculated from the same terrain profiles, distances and antenna heights, but without vegetation. The results of this analysis, although limited to one example, begin to indicate that the rate of attenuation due to the tropical vegetation alone decreases as the path length is increased. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1964
- Accession Number
- AD0451045
Entities
Organizations
- ARCO