Bedienungsanleitung Pioneer AVIC-D3 (Seite 123 von 158) (Englisch)

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AppendixNAVI/AV

RDS-TMC function. Touching allows

you to check the locations of the traffic infor-

mation along the route. However, you cannot

perform rerouting.

Operation outside the memo-

rised area

When the vehicle leaves the memorised area, the

functions will be limited.

• The auto reroute function does not work.

• You can only display a larger scale map. The

map display will automatically change to a

50 km (or 100 km) scale.

• The map matching function will not be availa-

ble. Therefore, the position of your vehicle may

be misaligned.

• The navigation guidance will only be available

when arriving at your destination. Other guid-

ance is not possible (this includes no display of

direction arrows).

To cancel these limitations, insert the DVD Map

Disc to the navigation system.

Positioning Technology

The navigation system accurately measures your

current location by combining the positioning by

GPS and by Dead Reckoning.

Positioning by GPS

The Global Positioning System (GPS) uses a net-

work of satellites orbiting the Earth. Each of the

satellites, which orbit at a height of 21 000 km,

continually broadcasts radio signals giving time

and position information. This ensures that sig-

nals from at least three can be picked up from

any open area on the earth’s surface.

The accuracy of the GPS information depends on

how good the reception is. When the signals are

strong and reception is good, GPS can determine

latitude, longitude and altitude for accurate posi-

tioning in three dimensions. But if signal quality

is poor, only two dimensions, latitude and longi-

tude, can be obtained and positioning errors are

somewhat greater.

Positioning by dead reckoning

The 3D Hybrid Sensor in the navigation system

also calculates your position. The current loca-

tion is measured by detecting driving distance

with the speed pulse, the turning direction with

the Gyrosensor and inclination of the road with

the G sensor.

The 3D Hybrid Sensor can even calculate

changes of altitude, and corrects for discrepan-

cies in the distance travelled caused by driving

along winding roads or up slopes. Also, the navi-

gation system learns the driving conditions and

stores information in the memory. Thus, as you

drive more, the precision of the positioning

becomes more accurate.

The method of positioning changes as follows

depending on whether the speed pulse of your

vehicle is detected or not:

3D hybrid mode

This is active when the speed pulse is detected.

Inclination of a road can be detected.

Simple hybrid mode

When the speed pulse is not detected, position-

ing is performed in this mode. Only horizontal

movement is detected, so it becomes less accu-

rate. Also, when the positioning by GPS is not

available, such as when your vehicle enters a

long tunnel, the discrepancy between your actual

and calculated position may become bigger.

MAN-AVIC-D3-EN.book Page 121 Monday, January 15, 2007 8:51 AM

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