Global Positioning System (GPS)
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GPS
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The Global Positioning System (GPS) is a worldwide radio navigation system that includes 24 satellites and their ground stations
that monitor the operation of the satellites.
A GPS terminal, such as the GPS receiver in the Nokia E90 Communicator, receives low-power radio signals from the satellites,
and measures the travel time of the signals. From the travel time, the GPS receiver can calculate its location to the accuracy of
meters.
Coordinates are expressed in degrees and decimal degrees format using the WGS-84 coordinate system.
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.
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.
The trip meter has limited accuracy, and rounding errors may occur. Accuracy can also be affected by availability and quality of
GPS signals.