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Low-altitude satellites are placed much closer to Earth and do not remain permanently above one spot on Earth. They rotate around Earth just as the Moon does. To provide
continuous coverage to an area, many satellites need to be placed in orbit. There are currently many low-altitude communication systems in development.
The Iridium system, for example, consists of 66 low-altitude satellites.
Lloyd's Satellite Constellation Systems' Web page provides and collects information on Iridium as well as other satellite constellation systems. The low-altitude satellite technology maybe used for Internet access sometime in the future. used in telephone networks and in the backbone of the Internet.
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