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126 Section 3B: Location Based Services
approximate location for the device. In general, at least three
surrounding base stations are required to get an optimal
position fix.
What does MS-Based mode of operation mean?
MS-Based (Mobile Station-Based) GPS mode is defined as an
implementation where assistance data is provided to the
mobile station or device by the Location server, such that the
device can calculate its own location estimate.
Does this device actually use GPS satellites to calculate its
locations?
It depends. If you are indoors, then the answer is no – instead,
AFLT is used. AFLT uses base station triangulation to calculate
your location. If you are outside, then it will use MS-Based
GPS and actual satellites are used to determine your location.
How accurate is AFLT if it does not use real satellites?
AFLT accuracy is limited to the geometry of the cellular base
stations surrounding the device requesting location
information. The better the triangulation, the more accurate
the fix.
How long does it take to get the first GPS fix?
Once you connect to the Sprint network you should get a fix
within 10 seconds.
Is there a minimum time before a new fix can be made?
Fixes are cached for five minutes. During that time, any
queries the user makes will reuse the same GPS location
coordinate values.
Will my device location services work indoors?
Yes, but it uses AFLT to determine your location. This version
of the service works best when the user is outdoors. Please