Tropospheric scatter (or troposcatter) is the scattering of distant TV and
FMradio stations by the troposphereso 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 antennas focus a high power radio beam at the troposphere mid-way between the transmitter and receiver. A certain proportion of the signal is refracted and received at a similar antenna at the receiving station.
One such link operated between the North of
Scotland, at Mormond Hilland the Shetland Isles.
The U.S. Army uses tactical tropospheric scatter systems developed by
Raytheonfor long haul communications. The systems come in two configurations, the original "heavy tropo", and a newer "light tropo" configuration exist. The systems provide four multiplexed group channels and trunk encryption, and 16 or 32 local analog phone extensions.
The U.S. Marine Corps also uses the same device, albeit an older version.
ACE High- Cold war era NATO European troposcatter network
White Alice Communications System- Cold war era Alaskan tropospheric communications link
List of White Alice Communications System sites
* [http://www.engadget.com/2007/02/13/raytheon-live-demos-dart-t-troposcatter-communications/ DART-T]
* [http://www.trrlsever.org Russian tropospheric relay communication network]
* [http://www.its.bldrdoc.gov/fs-1037/dir-038/_5617.htm FS-1037C definition of tropospheric scatter]
* [http://rammstein.dfmk.hu/~s200/tropo.html Troposcatter communication network maps]
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tropospheric scatter — ☆ tropospheric scatter n. scattering in the earth s troposphere, used in scatter communication at VHF and UHF for ranges beyond line of sight … English World dictionary
tropospheric scatter — Telecommunications. transmission of radio frequency signals that have been scattered from irregularities in the troposphere to locations hundreds of kilometers distant. [1950 55] * * * tropospheric scatter, a way of transmitting radio, television … Useful english dictionary
tropospheric scatter — Telecommunications. transmission of radio frequency signals that have been scattered from irregularities in the troposphere to locations hundreds of kilometers distant. [1950 55] * * * … Universalium
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