Audi NAVIGATION SYSTEM PLUS Specifications download pdf (Page 10)

Basic principles

AU DI

SSP 199-012

Although the Global Positioning System is the

primary source of information for the Radio

Navigation System, the system is able to

make allowance for short periods of recep-

tion interference.

For this purpose, the direction of travel and

distance travelled are only calculated using

the information provided by the angle of turn

sensor and the wheel speed pulses generated

by the ABS wheel sensor.

Reception interference of satellite signals

Comparison with GPS signals is not possible, and

position fixings are less accurate when reception

is disturbed.

As soon as GPS signals can again be received, the

previously calculated position is corrected.

Reception interference may occur if the satellite transmitter does not have line-of-sight contact

with the receiver of the Radio Navigation System or if the satellite signal is reflected off buil-

dings, mountains, etc.

In the following situations, the radio link with the satellite may be interrupted or faulty:

- Street canyons

- Valleys

- Tunnels

- Multi-storey car parks

This may lead to an inaccurate position fixing or render the system unable to locate the vehicle.

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Audi NAVIGATION SYSTEM PLUS Specifications Page 10