Nokia 5800EN - Manual (Page 62)

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. The GPS receiver
should only be used outdoors to allow reception of GPS
signals.
Any 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.
To enable or disable different positioning methods, select
Menu > Applications > Location and Positioning >
Positioning methods .
Assisted GPS (A-GPS)
Your device also supports Assisted GPS (A-GPS).
A-GPS is a network service.
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.
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.
Your device is preconfigured to use the Nokia A-GPS service,
if no service provider-specific 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. To define an access point for A-GPS,
select Menu > Applications > Location and
Positioning > Positioning server > Access point . A
wireless LAN (WLAN) access point cannot be used for this
service. Only a packet data internet access point can be used.
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.
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.
Positioning (GPS)
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