Nokia C5-00 User Manual

Also see for C5-00: User guide Service manual User guide User guide User guide

Contents

Nokia C5-00 User Manual Manual pdf 53 page image

PositioningThese applications require a GPSconnection.About GPSThe Global Positioning System (GPS) isoperated by the government of the UnitedStates, which is solely responsible for itsaccuracy and maintenance. The accuracyof location data can be affected byadjustments to GPS satellites made by theUnited States government and is subjectto change with the United StatesDepartment of Defense civil GPS policy andthe Federal Radionavigation Plan.Accuracy can also be affected by poorsatellite geometry. Availability andquality of GPS signals may be affected byyour location, buildings, naturalobstacles, and weather conditions. GPSsignals may not be available insidebuildings or underground and may beimpaired by materials such as concreteand metal.GPS should not be used for preciselocation measurement, and you shouldnever rely solely on location data from theGPS receiver and cellular radio networksfor positioning or navigation.The trip meter has limited accuracy, androunding errors may occur. Accuracy canalso be affected by availability and qualityof GPS signals.The coordinates in the GPS are expressedusing the international WGS-84coordinate system. The availability of thecoordinates may vary by region.Assisted GPS (A-GPS)Your device also supports assisted GPS (A-GPS).A-GPS requires network support.Assisted GPS (A-GPS) is used to retrieveassistance data over a packet dataconnection, which assists in calculatingthe coordinates of your current locationwhen your device is receiving signals fromsatellites.When you activate A-GPS, your devicereceives useful satellite information froman assistance data server over the cellularnetwork. With the help of assisted data,your device can obtain the GPS positionfaster.Your device is preconfigured to use theNokia A-GPS service, if no service provider-specific A-GPS settings are available. Theassistance data is retrieved from the NokiaA-GPS service server only when needed.To disable the A-GPS service, select >Applications > GPS data and Options >Positioning settings > Positioningmethods > Assisted GPS > Options >Disable.You must have an internet access pointdefined in the device to retrieveassistance data from the Nokia A-GPSservice over a packet data connection. Theaccess point for A-GPS can be defined inpositioning settings. Only a packet datainternet access point can be used. Yourdevice asks you to select the internetaccess point when GPS is used for the firsttime.Positioning 53© 2010 Nokia. All rights reserved.