HTC 99HEJ116-00 User Manual - Page 167

Navigating on the Road 167 • The Global Positioning System (GPS) is built and operated by the US Defense Department. The Department is responsible for the accuracy and maintenance of the system. Any changes that the Department makes may affect the accuracy and function of the GPS system. • Do not leave your device in a vehicle or expose the device to direct sunlight to avoid overheating the battery, which could pose damage to the device or risk to the vehicle. 10.2 Downloading Satellite Data via QuickGPS Before you start using your device for GPS navigation, open the QuickGPS program first to download ephemeris data (current satellite position and timing information) onto your device. This data is needed to determine the GPS position of your current location. QuickGPS downloads ephemeris data from a Web server, instead of from the satellites, using the Internet connection on your device, which can be via Wi-Fi, ActiveSync or GPRS/3G. This significantly speeds up the time for determining your GPS position. To open QuickGPS Tap Start > Programs > QuickGPS. To download data Tap Download on the QuickGPS screen. On the screen, initially, you will see the Valid time of the downloaded data. As time passes, the remaining days and hours of validity will be shown. To speed up GPS positioning, download the latest ephemeris data when the validity of the data expires.