Accession Number : AD0291590

Title :   PERFORMANCE OF TROPOSPHERIC SCATTER /SYSTEMS AS A FUNCTION OF WEATHER CONDITIONS

Corporate Author : STANFORD RESEARCH INST MENLO PARK CALIF

Personal Author(s) : DENNIS,ARNETT S.

Report Date : JUN 1961

Pagination or Media Count : 1

Abstract : Previous studies have shown that signal levels on tropospheric scatter links are related to weather conditions along the path. It was found that monthly median signals are correlated with radio refractivity gradients near the ground. Thus, climatological data can be used to improve estimates of basic transmission loss for projected scatter links. The correlations of hourly median signals with refractivity gradients and the surface refractivity are investigated for an over-water and a coastal path and found to be significant. This indicates that shortrange forecasts of scatter-circuit performance over water and some coastal areas can be made using routinely available meteorological data. The question of extending the STARCOM network in the western Pacific using tropospheric scatter links is discussed briefly in the light of these considerations. The possibility of jamming scatter links is examined in a separate appendix (classified). (Author)

Descriptors :   *METEOROLOGY, *SCATTERING, CLIMATE, RADIO WAVES, REFRACTION, SIGNALS, VERY HIGH FREQUENCY, WAVE PROPAGATION, WEATHER FORECASTING

Distribution Statement : APPROVED FOR PUBLIC RELEASE