| Tropospheric Scatter |
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Information AboutTropospheric Scatter |
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| radio frequency propagation | |
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White Alice Site, Tropospheric scatter antenna and feeder.]] Tropospheric scatter (or '''troposcatter''') is the scattering of distant TV and FM radio stations by the Troposphere so that they travel farther than the Line Of Sight . This effect sometimes allows reception of stations up to a hundred miles away. The phenomenon has been used to build communication links in a number of parts of the world. Large Billboard Antenna s focus a high power radio beam at the troposphere mid-way between the transmitter and receiver. A certain proportion of the signal is reflected and received at a similar antenna at the receiving station. One such link operated between the North of Scotland , at Mormond Hill and the Shetland Isles . The U.S. Army uses tactical tropospheric scatter systems developed by Raytheon for long haul communications. The systems come in two configurations, the original "heavy tropo", and a newer "light tropo" configuration exist. The systems provide four muxed group channels and trunk encryption, and 16 or 32 local analog phone extensions. SEE ALSO
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