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gps systemThe GPS or Global Positioning System is a global navigation system used for military and civilian applications alike.
Most ships and airplanes are equipped with GPS systems so that they can accurately plot on a map where they are. In planes, this is especially useful during bad weather, and in ships in knowing where shallow water and other sunken obstacles may lie. The author would have loved to have used GPS years ago in college. We had a class where we used maps and compasses. We were given precise coordinates and had to plot a course through woods and streams and swamps to find and sign in at specific latitude and longitude coordinates. Today, this sport, now called "geocaching", is a popular activity, particularly for outdoor hiking enthusiasts. The most recent launch was in September 2005. The oldest GPS satellite still in operation was launched in February 1989. Each satellite repeatedly re-broadcasts the exact time according to its internal atomic clock along with a digital data packet that includes the satellite's precise position, satellite status messages, and an almanac of the approximate position of every other active GPS satellite. The almanac lets GPS receivers use data from the strongest satellite signal to locate other satellites. Commercial civilian GPS receivers are purposefully less accurate than they might be. In specific, they are required to have limits on the velocities and altitudes at which they will report coordinates in order to prevent them from being used to create improvised missiles. In 1985, ten experimental Block-I satellites were up. A complete "constellation" of 24 satellites was in orbit by January 17, 1994. In 1996, President Bill Clinton issued a policy directive declaring GPS to be a dual-use system, meaning that it could be made avilable for a wide range of civilian and military purposes. GPS was first made available for commercial applications in 1983, after the Soviet Air Force shot down the civilian airliner KAL 007 in restricted Soviet airspace, killing all 269 people on board.
1. Global Positioning System - Wikipedia, the free encyclopedia
GPS receivers are now integrated in many mobile phones. The Global Positioning System (GPS) is a U.S. space-based global navigation satellite system. ... 2. Global Positioning System Public information about the Global Positioning System (GPS) and other space-based positioning, navigation, and timing (PNT) systems 3. GPS Store GPS Systems at The GPS Store, Inc. The Worlds Favorite Source for Garmin GPS Navigation Systems, Magellan Units, TomTom Receivers, Lowrance, Marine Electronics and ... 4. GPS System - A Guide to Making the Right Purchase With the right GPS navigation system, you can know exactly where you are at all times, and access information that can help you get where you want to be. ... 5. Garmin | What is GPS? The global positioning system is a satellite-based navigation system consisting of a network of 24 orbiting satellites, eleven thousand nautical miles in space, in ... 6. Fleet Management Solutions - Satellite GPS Vehicle Tracking ... 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Portable GPS Navigation Systems Garmin Automotive Magellan Car Navigators TomTom Receivers Maps GPS Software Humminbird Marine Electronics Accessories at GPSCenter.com 12. RLA GeoSystems Featured are Dick's 10 Best GPS Web sites, Dick's 10 Best GIS Web sites and Dick's 10 ... 13. Find Handheld GPS System at handheldgpssystems.net Research, compare, and shop for Handheld GPS System. Save on Handheld GPS System and more at handheldgpssystems.net 14. All About GPS Shockwave-animation enhanced tutorial presented by Trimble Navigation. 15. GPS World Magazine Monthly publication serving the needs of those who use the global positioning system (GPS) 16. GPS Systems - Garmin GPS - Magellen GPS GPS Systems; Garmin, Magellen, tom tom, handheld gps, auto gps 17. GPS Navigation Systems, GPS Tracking Devices: NovAtel Inc. - Home NovAtel is a leading provider of precise GPS systems (global positioning systems), augmentation components, GPS tracking devices, and GPS navigation sub-systems ... 18. 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GPS Systems at GPS systems galore, The source for Garmin Receivers, Sitex/Koden units, Magellan Units, Lowrance and Accessories.The Worlds Favorite Source for Garmin ... 30. GPS System - How GPS Systems Work The GPS system is the brain child of the U.S. Department of Defense and was first invented to assist the operations of the United States Air Force. ... 31. AAA and Magellan partnership 32. GPS TRACKING, GPS VEHICLE TRACKING, Fleet Management, GPS ... GPS TRACKING, GPS VEHICLE TRACKING, Fleet Management, GPS PHONE TRACKING, GPS ASSET TRACKING, GPS CAR TRACKING, GPS TRACKING SYSTEM, GPS TRACKING DEVICES, GPS SYSTEM, ... 33. MegaGPS, Garmin GPS Super Store Online, Mega Means More The Garmin GPS Specialty Store ... It is the responsibility of the buyer to determine suitability of a GPS for their needs prior to using the unit and to read all ... 34. Navtrak Thousands of businesses nationwide trust Navtrak's GPS tracking system to provide accurate, dependable GPS data. 35. gps system: Information from Answers.com Garmin nuvi 255W Car GPS Receiver Automobile GPS, Fixed, LCD TFT Display, 1000 Waypoints, Battery Life: 4 Hours $109.00 - $455.00 Garmin Forerunner } ?>
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