What is GPS and how does it work? The Global Positioning System (GPS) is a commonly used navigation and position tracking instrument. It's completely free. It can also be used to locate a user's position in time. It is used to determine a location and the changes that occur on the surface of the earth. Because of the rubidium clocks on each satellite, GPS can calculate extremely precise timing. These clocks allow satellites to know their exact location at very precise times, which is useful for a variety of applications such as marine hydrography, driverless cars, and precision agriculture.
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