NISSAN 2012 LEAF - Navigation System Owner's Manual - Manual (Page 239)

CURRENT VEHICLE LOCATION
Display of current vehicle location
This navigation system combines the data
obtained 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
guidance 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
position 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,
depending on the environment. Vehicles in the
following areas/environments may not receive
GPS signals (indicator color: gray).
* Inside tunnels or parking garages
* In areas with numerous tall buildings
* Under multi-layered highways
* Areas with numerous tall trees
Troubleshooting guide/General system information 10-27
GENERAL SYSTEM INFORMATION