Global Positioning System

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Artist’s conception of GPS Block II-F satellite in Earth orbit. The Global Positioning System, usually called GPS, and originally named NAVSTAR, is an intermediate circular orbit (ICO) satellite navigation system used for determining one’s precise location and providing a highly … Read More

Communications satellites

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U.S. military WGSS communications satellite A communications satellite (sometimes abbreviated to comsat) is an artificial satellite stationed in space for the purposes of telecommunications using radio at microwave frequencies. Most communications satellites use geosynchronous orbits or near-geostationary orbits, although some … Read More