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GPS Antenna GPS Receiver unit to adjust vehicle position. (cont'd) Global Positioning System (GPS) The Global Positioning System (GPS) enables the navigation system to determine the current position of the vehicle by using the electric waves transmitted from the satellites in orbit around the earth. The satellites transmit the satellite identi- fication signal, orbit information, transmission time signal, and other information. When the GPS receiver receives the distance to each satellite and the satellite positions on their respective orbits. Position detection Image with GPS satellite NOTE: Four satellites on each of six orbits. Precision of GPS The precision of the GPS varies according to the number of satellites from which electric waves are received and the con- GPS MARK No satellite No. of SATELLITES Two or less CONDITION Impossible to detect vehicle position Three Four or more Yellow mark Green Not indicated Vehicle position dimensions Vehicle position Faulty DESCRIPTION GPS function is normal. The satellite electric waves received by the GPS are too few to detect the The longitude and latitude of the (Less precise than detection in three The longitude, latitude and the alti- The GPS can't be used due to a Main Menu Table of Contents |