TROPICAL PROPAGATION RESEARCH
Abstract
The report presents the results obtained from the first phase of an extensive experimental and theoretical research program on radio wave propagation in the environment of a tropical, thickly vegetated jungle. The experimental work during this first phase was carried out in Thailand in a geographical area classified as a wet-dry, or monsoon, tropical region. The vegetation in the main test area has a density of about 130 tons per acre and is considered to be typical of many jungle regions throughout Southeast Asia. The propagation tests and analyses contained in this report cover the frequency range of 100 kc/s to 10 Gc/s for propagation distances extending from 25 feet to 30 miles and antenna heights from about 7 to 80 feet above ground. Except at the lowest frequencies, all tests were conducted at both horizontal and vertical polarizations. Most of the data is presented in graphs of basic transmission loss plotted against horizontal distance, terrain characteristic, antenna height, transmission polarization or frequency. Also covered are the results of special measurements in the 1 to 10-Gc/s frequency range, the data from which is applicable to problems with line-of-sight systems operating over vegetated terrain and with short range radar systems propagating horizontally through vegetation. The large quantity of measured data demonstrates the complex effects upon path loss of irregular topography combined with dense tropical vegetation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1967
- Accession Number
- AD0660318
Entities
People
- Lester G. Sturgill
Organizations
- ARCO