About the GPS

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About the GPS

The GPS (global positioning system) is a worldwide satellite-based radio
navigation system.The GPS receiver, built into the navigation device, can
calculate its location to an accuracy of 10 meters. The accuracy
depends, for example, on the number of satellites, the signals of which
the GPS module receives. In optimal conditions, the accuracy may be
within a few meters.

The GPS antenna is located at the top of the navigation device. Some car
windshields and windows may contain metal, that may block or weaken
the satellite signals.

If you stand still, GPS cannot detect which way you are facing, because
it determines your direction on the basis of your movement.

The Global Positioning System (GPS) is operated by the government of the United
States, which is solely responsible for its accuracy and maintenance. The
accuracy of location data can be affected by adjustments to GPS satellites made
by the United States government and is subject to change with the United States
Department of Defense civil GPS policy and the Federal Radionavigation Plan.
Accuracy can also be affected by poor satellite geometry. Availability and quality
of GPS signals may be affected by your location, buildings, natural obstacles, and
weather conditions. The GPS receiver should only be used outdoors to allow
reception of GPS signals.

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I n t r o d u c t i o n

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GPS should only be used as a navigation aid. It should not be used for precise
location measurement and you should never rely solely on location data from the
GPS receiver for positioning or navigation.