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GPS Theory |
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GPS Theory
The Global Positioning System (GPS) is a worldwide radio-navigation system formed from a constellation of 24 satellites and their ground stations. GPS uses these "man-made stars" as reference points to calculate positions accurate to a matter of metres. In fact, with advanced forms of GPS you can make measurements to better than a centimeter! In a sense it's like giving every square meter on the planet a unique address. 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. These days GPS is finding its way into cars, boats, planes, construction equipment, movie making gear, farm machinery, even laptop computers.
The Global Positioning System provides users with GPS location and speed anywhere in the world 24 hours a day. This is done by using a constellation of satellites which orbit the earth and provide GPS transmissions to any user with a GPS receiver. There is no cost to use the GPS satellites beyond the purchase of a GPS receiver | |
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