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.

United States Department of Defense developed the system, officially named NAVSTAR GPS (Navigation Signal Timing and Ranging GPS), and the satellite constellation is managed by the 50th Space Wing at Schriever Air Force Base. Although the cost of maintaining the system is approximately US$400 million per year, including the replacement of aging satellites, GPS is available for free use in civilian applications as a public good.

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GOD'S GLOBAL POSITIONING SYSTEM: http://godsgps.blogspot.com/ via @addthis
wescarver (Wesley F. Miller) Sat, 07 Nov 2009 23:17:00 -0000
GOD'S GLOBAL POSITIONING SYSTEM: http://godsgps.blogspot.com/ via @addthis
the GPS is a good thing, its a very good thing, global positioning device... acronym fail. TW
llama_xing (Neil Thompson) Sat, 07 Nov 2009 22:05:43 -0000
the GPS is a good thing, its a very good thing, global positioning device... acronym fail. TW
@endrunlv RT Russia is positioning for more global power while US administration is throwing America under bus & wreaking American strength
politiknv (nevada) Sat, 07 Nov 2009 21:04:50 -0000
@endrunlv RT Russia is positioning for more global power while US administration is throwing America under bus & wreaking American strength
RT @lazysharktravel: What to teach for backpacking cooking class? | Global Positioning http://bit.ly/4nGLm4
thepathfinder01 (robert mc comis) Sat, 07 Nov 2009 03:49:46 -0000
RT @lazysharktravel: What to teach for backpacking cooking class? | Global Positioning http://bit.ly/4nGLm4
What to teach for backpacking cooking class? | Global Positioning http://bit.ly/16ONUw
BackCountryEdge (BackCountryEdge) Sat, 07 Nov 2009 00:31:35 -0000
What to teach for backpacking cooking class? | Global Positioning http://bit.ly/16ONUw
What to teach for backpacking cooking class? | Global Positioning: You can also demonstrate the ease of Freezer.. http://bit.ly/16ONUw
camppro (Todd) Fri, 06 Nov 2009 22:13:23 -0000
What to teach for backpacking cooking class? | Global Positioning: You can also demonstrate the ease of Freezer.. http://bit.ly/16ONUw

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