NISSAN 2011 Altima Hybrid - Manual (Page 278)

DISPLAY OF CURRENT VEHICLE
LOCATION
This navigation system combines the data ob-
tained from the vehicle (by gyro sensor) and from
GPS (Global Positioning System) satellites to
calculate the current location of the vehicle. This
position is then displayed throughout route guid-
ance to a destination.
WHAT IS GPS (Global Positioning
System)?
GPS is a position detecting system that uses
satellites deployed by the U.S. government. This
navigation system receives radio signals from
three or more different satellites that orbit
13,049 miles (21,000 km) above the earth in
space, and detects the position of the vehicle by
utilizing the principle of triangulation.
Positioning adjustment
When the system judges that the vehicle posi-
tion information is not accurate based on vehicle
speed and gyro sensor data calculations, the
system will automatically adjust the position of
the vehicle icon using GPS signals.
Receiving signals from GPS satellites
The reception of GPS signals can be weak, de-
pending on the environment. Vehicles in the fol-
lowing areas/environments may not receive GPS
signals.
CURRENT VEHICLE LOCATION
10-4 General system information