GPS Definition : Global Positioning System .
The Global Positioning System, usually called GPS, and originally named NAVSTAR, is a satellite-based navigation system used for determining one's precise location and providing a highly accurate time reference almost anywhere on Earth. A GPS unit uses these "man-made stars" as reference points to calculate positions accurate to a matter of meters. The GPS was designed by and is controlled by the United States Department of Defense and can be used by anybody for free. .
The cost of maintaining the system is approximately $400 million per year. The first of 24 satellites that form the current constellation of the Global Positioning System (Block II) was placed into orbit on February 14, 1989.
What does GPS do.
With GPS, you can find your way in any weather conditions, anywhere in the world, 24 hours a day. .
GPS receivers have been miniaturized to just a few integrated circuits and so are becoming very economical. And that makes the technology accessible to virtually everyone. There are no subscription fees or setup charges to use GPS.
These days GPS is finding its way into cars, boats, planes, construction equipment, movie making gear, farm machinery, even laptop computers. Soon GPS will become almost as basic as the telephone.
Hand-held GPS and car/boat kits.
Recreational uses of GPS are almost as varied as the number of recreational sports available. GPS is popular among hikers, hunters, snowmobilers, mountain bikers, and cross-country skiers, just to name a few. Anyone who needs to keep track of where he or she is, to find his or her way to a specified location, or know what direction and how fast he or she is going can use the benefits of the global positioning system.
While all GPS units will keep track of your whereabouts and guide you to a chosen location, mapping GPS receivers like the ones you find below display this information on road maps, marking your position in relation to highways, lakes, landmarks and cities.
