Sony PXW-X180 Operating Manual page 97

The GPS satellites are located in 6 orbits,
20,000 km above the earth. The GPS system
consists of 24 or more GPS satellites. A GPS
receiver receives radio signals from the satellites,
and calculates the current location of the receiver
based on the orbital information (almanac data)
and travel time of the signals, etc.
Determining a location is called "triangulating."
A GPS receiver can determine the location's
latitude and longitude by receiving signals from 3
or more satellites.
• As the positions of GPS satellites vary
constantly, it may take longer to determine the
location or the receiver may not be able to
determine the location at all, depending on the
location and time you use the camcorder.
• "GPS" is a system for determining geographic
location by triangulating radio signals from
GPS satellites. Avoid using the camcorder in
places where radio signals are blocked or
reflected, such as a shadowy place surrounded
by buildings or trees, etc. Use the camcorder in
open sky environments.
• You may not be able to record location
information at locations or in situations where
radio signals from the GPS satellites do not
reach the camcorder as follows.
—In tunnels, indoors or under the shade of
buildings.
—Between tall buildings or at narrow streets
surrounded by buildings.
—In underground locations, locations
surrounded by dense trees, under an
elevated bridge, or in locations where
magnetic fields are generated, such as near
high voltage cables.
—Near devices that generate radio signals of
the same frequency band as the camcorder:
near 1.5 GHz band mobile telephones, etc.
• If you upload and share the images which are
recorded with the setting "GPS" is "On", the
record location may be exposed on the internet
even if you do not intend to do so. If you do not
want to record location information, select
"Off" for "GPS" (page 86).
On triangulating errors
• If you move to another location right after
setting "GPS" to "On" in the menu, it may take
a longer time for the camcorder to start
triangulating, compared to when you stay in the
same place.
• Error caused by the position of GPS satellites
The camcorder automatically triangulates your
current location when the camcorder receives
radio signals from 3 or more GPS satellites. The
triangulating error allowed by the GPS satellites
is about 10 m (33 feet). Depending on the
environment of the location, the triangulating
error can be greater. In this case, your actual
location may not match the location on the map
based on the GPS information. Meanwhile, the
GPS satellites are controlled by the United
States Department of Defense, and the degree of
accuracy may be changed intentionally.
• Error during the triangulating process
The camcorder acquires location information
periodically during triangulating.
On the restriction of use of GPS
Use GPS in accordance with the regulations of the
situation, the countries/regions of use.
On the geographic coordinate system
The "WGS-84" geographic coordinate system is
used.
Important Notes on Operation 97