window MITSUBISHI LANCER 2010 8.G MMCS Manual
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GPS Measurement 1-7
Introduction
GPS Measurement
GPSGPS is the acronym for Global Positioning System.
The MMCS uses GPS satellites that orbit the Earth
in space at an altitude of approximately 20,000km.
Electromagnetic waves from at least three of these
satellites are received on the Earth by the system,
making it possible to learn the current position.Map MatchingWhen traveling with just the GPS, there may be errors
in the current position display. In such case, “map
matching” is the function that compensates for this
error by assuming that vehicles travel on roads and
placing the current position on a nearby road.GPS antenna positionThe position of the vehicle is determined from the
weak electromagnetic waves from GPS satellites
received by the GPS antenna.
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NOTESince it may not be possible to accurately display the
vehicle position if the electromagnetic waves from
the GPS satellite are blocked, be sure to obey the
following:
Do not attach re ective-type lms or lms containing
carbon to the window glass.
Do not place objects on top of or close to the GPS
antenna.
Do not use cellphones, computers, etc. near the
GPS antenna.Situations where accurate measurement is not
possibleIn situations such as the following, accurate
measurement may not be possible.
Inside a tunnel or indoor parking area Under a two-tier freeway
Area with many high-rise buildings Between closely-spaced treesThe US Tracking and Control Center controls the
satellites. Sometimes the electromagnetic waves are
stopped during upgrades or repairs to the system.NOTE Do not block the electromagnetic waves, from GPS
satellites by placing objects on or around the GPS
antenna.
Avoid using a 1.5G digital mobile phone in the vicinity
of the GPS antenna, as it could prevent accurate
measurement.