P o s i t i o n i n g
8. Positioning
Q
GPS receiver
The Global Positioning System (GPS) is a worldwide radio navigation system
that includes 24 satellites and their ground stations that monitor the operation
of the satellites. Your radio is equipped with an internal GPS receiver.
A GPS terminal, such as the GPS receiver in the TH1n, receives low-power
radio signals from the satellites, and measures the travel time of the signals.
From the travel time, the GPS receiver can calculate its location to the
accuracy of metres.
You can use the GPS applications in the
menu. When the GPS
receiver is on,
is displayed. If the indicator blinks, the GPS receiver is
calculating its location. When using the GPS receiver, do not touch the
antenna of the radio; the antenna of the GPS receiver is located there. Hold
the radio upright in your hand at an angle of about 45 degrees, with a clear
view of the sky.
The GPS receiver in the TH1n takes its power from the radio battery. Note
that using the GPS receiver may drain the battery faster.
Note: The Global Positioning System
The Global Positioning System (GPS) is operated by the United States
government, which is solely responsible for accuracy and maintenance of the
system.
The accuracy of location 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 buildings and natural
obstacles as well as weather conditions. The GPS receiver should only be
used outdoors to allow reception of GPS signals.
Therefore, GPS should not be used for precise location measurement and you
should never rely solely on location data from the GPS receiver.
Polaris_en_print.book Page 60 Tuesday, October 23, 2012 12:30 PM