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134 Navigating on the Road
Wireless communication products (such as mobile phones or radar-detecting
devices) may interfere with the satellite signal, resulting in unstable signal
reception.
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.
9.3 Downloading Satellite Data via QuickGPS
Before you start using your phone for GPS navigation, open the QuickGPS program
first to download ephemeris data (current satellite position and timing information)
onto your phone. 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 phone, which can be via Wi-Fi,
ActiveSync or GPRS/3G. This significantly speeds up the time for determining your
GPS position.
To open QuickGPS
Click Start > Accessories > QuickGPS .
To download data
Click
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.
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