Satellite Navigation

Satellite Navigation

General Information and Components

A simple satellite navigation system requires only a navigation control module and a navigation system antenna (R50). Vehicle-specific information is not needed.

Function

Each time the navigation system is turned on, the navigation control module attempts to receive signals from GPS satellites via the navigation system antenna. The signal from 4 satellites are needed for an exact positioning. This way the position of the receivers can be calculated at any point on the earth. The satellites transmit, in milliseconds, the identification code, the location, and the exact clock time. The GPS in the navigation control module receives the data through the navigation system antenna. Using the clock time, the navigation control module calculates how long it took to receive the data. When the navigation computer receives the data from at least 4 satellites it can then determine the location of the vehicle.

Service Information

Satellite navigation will be disabled if, for example, the navigation system antenna is faulty or when driving through a tunnel.

In the 2nd generation MMI, information regarding the satellites and the condition of the navigation system antenna can be read in measured value block 5 in the navigation control module.

• The number of satellites being received is displayed in the MMI. Press the NAV Info button while the navigation is on. The number of satellites being received will appear either at the top or at the bottom, depending on the generation of the MMI.

After starting the vehicle when it is cold, it may take up to 10 minutes until GPS data starts being received.

Audi vehicles which are equipped with a navigation system will use the system whenever possible.