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tropospheric bending

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  • Meteorological history of Hurricane Gordon (1994) — Hurricane Gordon Category 1 hurricane (SSHS) Hurricane Gordon s winding route Formed November 9, 1994 Dissipated …   Wikipedia

  • K-factor — Telecommunications= In telecommunication, the term k factor has the following meanings: 1. In tropospheric radio propagation, the ratio of the effective Earth radius to the actual Earth radius. Note: The k factor is approximately 4/3. 2. In… …   Wikipedia

  • Water absorption — is a phenomenon in the transmission of electromagnetic radiation through a medium containing water molecules. Water molecules are excited by radiation at certain wavelengths and tend to selectively absorb portions of the spectrum while allowing… …   Wikipedia

  • wind — wind1 n. /wind/, Literary /wuynd/; v. /wind/, n. 1. air in natural motion, as that moving horizontally at any velocity along the earth s surface: A gentle wind blew through the valley. High winds were forecast. 2. a gale; storm; hurricane. 3. any …   Universalium

  • Radio horizon — In telecommunication, radio horizon is the locus of points at which direct rays from an antenna are tangential to the surface of the Earth. If the Earth were a perfect sphere and there were no atmospheric anomalies, the radio horizon would be a… …   Wikipedia

  • Very high frequency — (VHF) is the radio frequency range from 30 MHz to 300 MHz. Frequencies immediately below VHF are denoted High frequency (HF), and the next higher frequencies are known as Ultra high frequency (UHF). The frequency allocation is done by ITU. Common …   Wikipedia

  • Angola — Angolan, adj., n. /ang goh leuh/, n. a republic in SW Africa: formerly an overseas province of Portugal; gained independence Nov. 11, 1975. 10,623,994; 481,226 sq. mi. (1,246,375 sq. km). Cap.: Luanda. Formerly, Portuguese West Africa. * * *… …   Universalium

  • telecommunications media — Introduction       equipment and systems metal wire, terrestrial and satellite radio, and optical fibre employed in the transmission of electromagnetic signals. Transmission media and the problem of signal degradation       Every… …   Universalium

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