Shanghai Huace Navigation Technology LTD. A02025 Benutzerhandbuch
A Communication Ports Definition
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EGNOS is the European equivalent of WAAS, which is available in
the United States.
the United States.
elevation mask The angle below which the receiver will not track satellites.
Normally set to 10 degrees to avoid interference problems caused
by buildings and trees, and multipath errors.
by buildings and trees, and multipath errors.
ephemeris
/
ephemerides
A list of predicted (accurate) positions or locations of satellites as a
function of time. A set of numerical parameters that can be used
to determine a satellite’s position.
Available as broadcast ephemeris or as postprocessed precise
ephemeris.
function of time. A set of numerical parameters that can be used
to determine a satellite’s position.
Available as broadcast ephemeris or as postprocessed precise
ephemeris.
epoch
The measurement interval of a GPS receiver. The epoch varies
according to the measurement type: for real-time measurement it
is set at one second; for postprocessed measurement it can be set
to a rate of between one second and one minute. For example, if
data is measured every 15 seconds, loading data using 30-second
epochs means loading every alternate measurement.
according to the measurement type: for real-time measurement it
is set at one second; for postprocessed measurement it can be set
to a rate of between one second and one minute. For example, if
data is measured every 15 seconds, loading data using 30-second
epochs means loading every alternate measurement.
firmware
The program inside the receiver that controls receiver operations
and hardware.
and hardware.
GLONASS
Global Orbiting Navigation Satellite System. GLONASS is a Soviet
space-based navigation system comparable to the American GPS
system. The operational system consists of 21 operational and 3
non-operational satellites in 3 orbit planes.
space-based navigation system comparable to the American GPS
system. The operational system consists of 21 operational and 3
non-operational satellites in 3 orbit planes.
GNSS
Global Navigation Satellite System.
GSOF
General Serial Output Format. A Trimble proprietary message
format.
format.
HDOP
Horizontal Dilution of Precision. HDOP is a DOP value that
indicates the accuracy of horizontal measurements. Other DOP
values include VDOP (vertical DOP) and PDOP (Position DOP).
Using a maximum HDOP is ideal for situations where vertical
precision is not particularly important, and your position yield
would be decreased by the vertical component of the PDOP ( for
example, if you are collecting data under canopy).
indicates the accuracy of horizontal measurements. Other DOP
values include VDOP (vertical DOP) and PDOP (Position DOP).
Using a maximum HDOP is ideal for situations where vertical
precision is not particularly important, and your position yield
would be decreased by the vertical component of the PDOP ( for
example, if you are collecting data under canopy).
L1
The primary L-band carrier used by GPS satellites to transmit
satellite data.
satellite data.
L2
The secondary L-band carrier used by GPS satellites to transmit
satellite data.
satellite data.
L5
The third L-band carrier used by GPS satellites to transmit satellite
data. L5 will provide a higher power level than the other carriers.
As a result, acquiring and tracking weak signals will be easier.
data. L5 will provide a higher power level than the other carriers.
As a result, acquiring and tracking weak signals will be easier.
MSAS
MTSAT Satellite-Based Augmentation System. A satellite-based
augmentation system (SBAS) that provides a free-to-air differential
correction service for GPS. MSAS is the Japanese equivalent of
augmentation system (SBAS) that provides a free-to-air differential
correction service for GPS. MSAS is the Japanese equivalent of