Navigation System Japan With Hard Drive: Function

The Japanese version of the navigation system is used for route planning, route information (traffic jams, parking space information, etc.) and for monitoring the route.

GPS Navigation  (G  lobal P  ositioning S  ystem): The GPS navigation system pinpoints locations by means of the signals transmitted by satellites. The signals are received by the GPS antenna on the vehicle, processed by the GPS receiver and passed to the navigation computer as latitude and longitude data. The navigation computer uses these to calculate the vehicle position.

Correct operation of the GPS navigation system is only possible when there is an unbroken line of sight between the GPS antenna and at least two GPS satellites. In underground car parks, tunnels, etc. GPS function will be impaired or impossible. Navigation computer with GPS receiver, hard drive and gyro sensor:  The map data (3D map) is located in the hard drive of the navigation computer. The navigation computer combines the vehicle position calculated by the GPS with this map data. The current position is shown on the onboard monitor in the 3D or 2D map.

The driver can enter a destination. The navigation computer calculates a route from the current location to this destination based on selectable criteria (via motorway, no motorway, etc.). The calculated route is shown in the route display.

While the vehicle is being driven, the navigation computer uses the DSC DFAVL signal to calculate the distance driven (direct line from DSC and information in a message via MOST).

An angular velocity meter, known as the "gyro sensor", informs the navigation computer about rotary movements of the vehicle (e.g. when turning off etc.). This gyro sensor is fitted in the casing of the navigation computer.