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gps system reviewThe GPS or Global Positioning System is a global navigation system used for military and civilian applications alike.
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. GPS is short for (the) Global Positioning System, a satellite navigation system developed by the US Department of Defense. A fleet of more than two dozen GPS satellites broadcasts precise timing signals to GPS receivers, allowing them to accurately determine location anywhere on Earth. In practice, this means that using a GPS device, you can find out where you are in terms of longitude, latitude and altitude. GPS receivers come in a variety of consumer formats, and today can be found in cars, watches, phones boats and planes. Major manufacturers include Trimble, Garmin and Leica, low-end, hand-held consumer units are often available at less than $100 per unit. In 1985, ten experimental Block-I satellites were up. A complete "constellation" of 24 satellites was in orbit by January 17, 1994. During the Gulf War, the shortage of military GPS units and the wide availability of civilian ones among personnel resulted in disabling the Selective Availability. In the 1990s the FAA started pressuring the military to turn off SA permanently. This would save the FAA millions of dollars every year in maintenance of their own, less accurate, radio navigation systems. The military resisted for most of the 1990s, but SA was eventually turned off in 2000 following an announcement by then US President Bill Clinton, allowing all users to enjoy nearly the same level of access. GPS allows the military to accurately target its missile arsenal, largely composed of cruise missiles and precision-guided munitions. This was born out by the use of SOFLAM (Special Operations Forces Laser Acquisition Markers) targeting during the attacks on Tora Bora in Afghanistan. It also improves the accuracy of the US submarine launched ballistic missiles by providing precise locational information to the submarine commanders. Finally, command and control over troops is improved because commanders know precisely where their troops and the enemy are located on the battlefield. 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. Hand-held GPS units are often used by hikers and mountain climbers to plot their courses and to accurately reflect exactly where they are. The author once used GPS to organize a helicopter evacuation of an injured motorcycle rider in a remote region of the La Sal mountains in Utah. A reading was taken, coordinates given, and the pilot was able to find us with ease. More accurate GPS receivers are used these days in surveying to accurately locate boundaries, structures and so on. The first experimental Block-I GPS satellite was launched in February 1978. The GPS satellites were initially manufactured by Rockwell International and now manufactured by Lockheed Martin. In late 2005, the US government introduced the first in a series of new generation GPS staellites offering new capabilities. Chief among these is a second civilian GPS signal called L2C for greater accuracy and reliability.
1. Portable GPS Navigation System Reviews
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It has all the bells and whistles that I was ... This is a great GPS system and I was lucky to get it at a great price ... 32. Garmin GPS 10x Bluetooth GPS System Reviews Garmin GPS 10x Bluetooth GPS System review by GPSCity.com customers, including Garmin GPS 10x Bluetooth GPS System pros and cons and Garmin GPS 10x ... 33. Garmin Nuvi GPS Systems Reviews Buying Guides Navigation ... Garmin Nuvi GPS Systems Reviews Buying Guides Portable Navigation Systems Information Navigation Gadgets News Maps and Software at Nuvi-GPS-Reviews.com 34. TomTom - 910 GPS Navigation System Reviews - Viewpoints Read TomTom - 910 GPS Navigation System reviews and find out why people rate it 4.49 out of 5.00 stars. People say, 'I love the capacity it has. 35. Garmin Nuvi Review - Reviews of Garmin's Nüvi GPS systems This means that the gps system actually says the street name or exit at which you must ... In addition, the gps system's voice even announces the name of exits ... 36. 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