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GPS

GPS. GPS. W h a t i s G P S?. - The Global Positioning System (GPS) is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the U.S. Department of Defense. How it works. - GPS satellites broadcast the time and data about their location

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GPS

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  1. GPS GPS

  2. What is GPS? - The Global Positioning System (GPS) is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the U.S. Department of Defense.

  3. How it works • - GPS satellites broadcast the time and data about their location • - a GPS receiver compares signals from at least three or four GPS satellites to determine it's own location

  4. How does a GPS receiver calculate its location? - A GPS receiver figures out how far away it is from each satellite based on how much time it takes a broadcast signal to travel from the satellite to the receiver. (A signal takes more time to reach you if you're farther away.) - Since the location of each GPS satellite is known, the receiver's location can be determined by "triangulating" the distances from several satellites

  5. Advantages OF GPS - GPS works in any weather conditions. - anywhere in the world, 24 hours a day. - There are no subscription fees or setup charges to use GPS.

  6. Sources of GPS signal errors - Ionosphere and troposphere delays - The satellite signal slows as it passes through the atmosphere. - Signal multipath - This occurs when the GPS signal is reflected off objects such as tall buildings or large rock.

  7. Done by: Asma 2011-10-25

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