GPS satellite The Global Positioning System, usually called GPS, is the only fully-functional satellite navigation system. A constellation of more than two dozen GPS satellites broadcasts precise timing signals by radio to GPS receivers, allowing them to accurately determine their location (longitude, latitude, and altitude) in any weather, day or night, anywhere on Earth.

GPS has become a vital global utility, indispensable for modern navigation on land, sea, and air around the world, as well as an important tool for map-making and land surveying. GPS also provides an extremely precise time reference, required for telecommunications and some scientific research, including the study of earthquakes.
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Top 5 navigation systems


star Garmin star TomTom
star Magellan star Wayfinder
star Navman  
star 4G star Dualdisc star Ginza
star Alfred Nobel star Esport star Gogel
star Budgettickets star Eurodownload star Sportstickets
star Carnavigation star Expressloan  
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