Nokia C6-00 Nokia C6-00 User Guide in US English - Page 62

accuracy and maintenance. The accuracy of location data can be affected by adjustments to GPS satellites made by the United States government and is subject to change with the United States Department of Defense civil GPS policy and the Federal Radionavigation Plan. Accuracy can also be affected by poor satellite geometry. Availability and quality of GPS signals may be affected by your location, buildings, natural obstacles and weather conditions. GPS signals may not be available inside buildings or underground and may be impaired by materials such as concrete and metal. GPS should not be used for precise location measurement, and you should never rely solely on location data from the GPS receiver and cellular radio networks for positioning or navigation. The trip meter has limited accuracy, and rounding errors may occur. Accuracy can also be affected by availability and quality of GPS signals. The coordinates in the GPS are expressed using the international WGS-84 coordinate system. The availability of the coordinates may vary by region. Your device is preconfigured to use the Nokia A-GPS service, if no service providerspecific A-GPS settings are available. The assistance data is retrieved from the Nokia A-GPS service server only when needed. You must have an internet access point defined in the device to retrieve assistance data from the Nokia A-GPS service over a packet data connection. Define an access point for A-GPS Select Menu > Applications > Location and Positioning > Positioning server > Access point. Only a packet data internet access point can be used for this service. Your device asks for the internet access point when GPS is used for the first time. Hold your device correctly When using the GPS receiver, ensure you do not cover the antenna with your hand. About assisted GPS (A-GPS) Your device supports A-GPS (network service). When you activate A-GPS, your device receives useful satellite information from an assistance data server over the cellular network. With the help of assisted data, your device can obtain the GPS position faster. Assisted GPS (A-GPS) is used to retrieve assistance data over a packet data connection, which assists in calculating the coordinates of your current location when your device is receiving signals from satellites. Establishing a GPS connection may take from a couple of seconds to several minutes. Establishing a GPS connection in a vehicle may take longer. The GPS receiver draws its power from the device battery. Using the GPS receiver may drain the battery faster. 62 © 2010 Nokia. All rights reserved.