About GPS Technology
The Global Positioning System (GPS) is a tracking an navigation system evelope by the
U.S. Department of Defense. The system uses 24 satellites that orbit the earth, sen ing out
ra io waves that can be picke up by GPS sensors (har ware evices for receiving ata).
Normally, a GPS sensor relies on receiving signals from four satellites simultaneously to
track its position. Each signal contains an i entifier for the satellite that emitte it an the
exact time it was emitte (to the nanosecon ). GPS relies on the fact that ra io waves travel
at the spee of light to calculate istances an the exact location of the sensor is figure by
combining the ata receive from three or four satellites.
Given the right con itions, a GPS sensor can i entify your geographic position anywhere in
the worl . GPS is able to give you the latitu e, longitu e an elevation of your present
location, as well as your roa spee an irection of travel on a route.
GPS Accuracy
The GPS signal CoPilot receives from the constellation of satellites has a rate accuracy of
10 meters. This means that 95% of the time the reporte location is within 10 meters (30
feet) of your exact position. CoPilot takes this location information an enhances it further
by "snapping" it to our street an highway network. Occasionally, CoPilot will place you on
the wrong roa . If this occurs, keep riving an CoPilot will automatically correct itself an
fin your proper position.
At times, CoPilot's GPS tracking will be less accurate or fail to work at all because the unit
is unable to receive satellite signals. However, the unit is resilient; eventually, it fin s itself.
Its ability to report your location is irectly proportional to its ability to receive accurate
line-of-sight satellite signals. Heavy foliage, buildings, or any other structures
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WARNING:
CoPilot navigation instructions are only computer-generate a visories
an may contain errors. Obey all traffic regulations even if they are
completely contra ictory to the navigation suggestions. eep your eyes
on the road and hands on the wheel! Do not attempt to look at the
screen if you are the river. TravRoute®assumes no responsibility for
any amage or injury resulting from the use of this pro uct.
