GPS/Navigation
Location Information Services
Mobile networks, Wi-Fi and GPS methods are
available to obtain current locations. With Wi-Fi
current locations can be speedily determined,
but accuracy is lacking. If GPS is used, it takes
more time, but accurate positioning can be
obtained. When determining current locations,
activate both Wi-Fi and GPS to utilize both of
their advantages.
What is GPS
• GPS is a function that receives signals from GPS
satellites for obtaining the location of this terminal.
• It cannot be used as navigation devices for
aircraft, vehicles and people or as a high-
precision GPS for measurement. Please note
that DOCOMO shall not bear responsibility for
damages which are pure economic losses which
are generated by opportunities missed to confirm
positioning results and missed communications
due to external factors (including exhausted
batteries) such as malfunctions, improper
operations and power outages of this terminal if
it is used for these purposes or even if it is not
used for these purposes.
• Since GPS is governed by the United States
Department of Defense, the GPS signals
might be controlled (degradation of accuracy,
signal blackouts, etc.) according to national
security reasons of the US. Also even if
positioning is done in the same locations
and environments, identical results may not
be obtained due to the differences in signal
conditions caused by the locations of the
satellites.
• Since GPS uses signals from satellites, in the
following environments there are locations
where signals cannot be received or reception
is poor. Thus, the range of error of location
information may be over 300 m.
- In the midst of or underneath dense tree
growth, in areas lined with buildings or
dense residential areas
- Inside or underneath buildings
- Inside of underground tunnels, underground
and underwater
- Near high-voltage lines
- Inside of cars and trains
- In poor weather such as heavy rainfall and
snow
- Inside of bags and boxes
- Hindrances (people and things) around this
terminal
200
Application