A GPS or Global Positioning System is used to determine the user’s current location, and the best route and directions for the destination. These positioning systems are now widely used in a variety of devices such as smart phones, automobile navigation systems, handheld devices, laptops and other such devices.
The working of this system is relatively simple to comprehend. In the working of a positioning system a GPS receiver calculates its position by measuring the distance between itself and three or more satellites. Since the signal travels at a known speed, measuring the time delay between transmission and reception of each GPS microwave signal gives the distance to each satellite, thus the calculations can be precise.
While doing this, the signals also carry information about the satellites’ location. Thus by determining the position of, and distance to, at least three satellites, the receiver can compute its position using trilateration. The GPS receivers usually do not have perfectly accurate clocks and therefore track one or more additional satellites to correct the receiver’s clock error. In such a way your location is taken out...
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