Publicou 12 edições por ano
ISSN Imprimir: 0040-2508
ISSN On-line: 1943-6009
Indexed in
The Troposphere Refraction Estimation by Attenuation Factor of Radiowave beyond-the-Horizon Propagation
RESUMO
A technique of the troposphere refraction properties estimation by attenuation factor of the TV signals on over-the-horizon path is proposed. The experimental results of attenuation factor and their statistical performances on over-the-horizon paths in the diffraction and long-distance tropospheric zones are presented. Using the approach proposed, these performances are recalculated in terms of equivalent gradients of the refraction factor. A comparison with the troposphere performance direct measurements using the spheres-probes was carried out. Seasonal and daily variability of the refraction gradients and attenuation was investigated. The empirical dependences of attenuation factor fluctuations variance on the effective gradient of the troposphere refraction coefficient index were derived.