A communications satellite (sometimes abbreviated to comsat) is an artificial satellite stationed in space for the purposes of telecommunications.
Modern communications satellites use geosynchronous orbits, Molniya orbits or low polar Earth orbits.
For fixed services, communications satellites provide a technology complementary to that of fiber optic submarine communication cables.
They are also used for mobile applications such as...
preview:
http://en.wikipedia.org/wiki/Communications_satellite
3/20/2007
