Meridian Data Transplant CF LP GPS Receiver GPS Receiver User Manual


 
protection film on glass,
heavy foliage,
large cliffs,
and other obstructions where the satellite signals may blocked, and, poor satellites
geometry situation. Initial state of the receiver, means latest status in memory of
the receiver, may mainly determine the time of TTFF. Position can be quickly fixed
within only 10 seconds from a hot-start state and needs 80 seconds typically from a
cold-start state. The receiver may need at least 3 to 5 minutes from a complete
restart-state, for example, flying a distance over 500 miles the time it last had a
position fix.
The CF LP GPS uses the satellite signals to calculate an exact geodetic location
through triangulation method, contained in 10 meters CEP accuracy without
Selective Availability (SA), which is good enough for general location awareness
purposes. The position data is then converted within the receiver to latitude and
longitude coordinates, which is usually provided in the geodetic datum on which
GPS is based (WGS 84). Position offsets of hundreds of meters or much more can
result from using the wrong datum.
In addition to datum used, there are number of positioning errors can occur,
limiting accuracy. The major errors including satellites orbiting error, poor satellite
geometry, multi-path signals, atmospheric delay, receiver clock timing, and poor
satellite signal reception.
Using optional external active antenna
*
An optional external active antenna is available for usage when operating under
certain environmental situations, such inside vehicles where satellite signals are
blocked. Detailed operation is described in the Operation chapter. Make sure to use
only the optional external antenna supplied by Transplant. Use of any other
antennas will severely degrade positioning performance or even damage the
receiver. Read basic guidelines before using optional external active antenna.
*External active antenna is an optional accessory which is not included in this package.
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