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Have you ever been fishing all day and it wasnt going well until the end of the day when you just found the perfect hot spot But the problem is that night is about to come and you have to get your boat back to the dock before darkness falls And you dont want to leave because you are just finally starting to catch big fish and you know you wont be able to find that spot again So what do you do You can rely on dumb luck and hope you can find that spot again Or you can buy a Global Positioning System GPS that will help you find that spot again within 100 meters A fishermans dream weapon against the enemy the fishThe Global Positioning System is a constellation of 24 satellites that orbit the Earth When these satellites are used with a GPS receiver makes it possible for a person to pinpoint their geographic position GPS uses these satellites as reference points to calculate positions within meters It was the US Department of Defense DOD that decided that the military needed a very precise form of worldwide positioning The DOD spent 12 billion dollars and now they have the greatest navigational system in the world The GPS is funded and controlled by the DOD the system was designed for and is operated by the US military The first GPS satellite was launched in 1978 The next ten satellites ware developmental satellites called Block I From 1989 to 1993 23 satellites were made called Block II In 1994 the 24th satellite was completed and the Global Positioning System was born and ready for use Now civilians are swamping the market The GPS consists of three interacting components 1 The Space Segment satellites 2 The Control Segment monitoring stations 3 The User Segment receiversThe Space Segment consists of 24 GPS satellites orbit the earth every 12 hours on the same ground track
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