M e r i d i a n I I U s e r M a n u a l
52
C H A P T E R F O U R
53
M e r i d i a n I I U s e r M a n u a l
H T T P S I N T E R F A C E
Receiver: Receiver Page
This page contains information related to the GPS Subsystem/Receiver. Data fields are described
below.
Subsystem Status
State
Shows the current state of the GPS Subsystem.
WARMUP:
Warmup period for units with oscillator upgrades.
ACQUIRING: Acquring. Searching for a signal.
LOCKING:
Locking to the GPS signal.
LOCKED:
Locked. Fully synchronized to signal.
TFOM
Shows the current TFOM value. See
Appendix A - TFOM
for more
information.
GPS Receiver Status
State
Shows the current state of the GPS Receiver.
WARMUP:
Warmup period for units with oscillator upgrades.
ACQUIRING: Acquring. Searching for a signal.
LOCKING:
Locking to the GPS signal.
LOCKED:
Locked. Fully synchronized to signal.
Satellite ID
This field lists the satellites that are currently being tracked. Up to 12 may be
tracked at a time. Click on the Satellite-Info link for details.
AGC
Automatic Gain Control DAC. Typical value is 150 to 200 in good signal
conditions.
Average C/No
The carrier-to-noise ratio is an indicator of the GPS signal quality.
This number typically ranges from 39 to 50 dB when Meridian II is locked.
GPS Dynamic
This field shows whether the dynamic mode is set or not. Dynamic mode should
Mode
be OFF when Meridian II is in a static (not moving) position. To change the
dynamic mode setting use the
gpsdynmode
command.
WGS-84 Reference Position
Position Source
The source of the reference position can be:
UNK:
Unknown position.
DYN:
Dynamic. Position determined while in Dynamic Mode.
USR:
User-entered reference position.
AVG:
Average is a 24-hour average of GPS fixes.
To change the reference position source use the
gpsrefpos
command.
Latitute,
The WGS-84 latitude and longitude in degrees, minutes and seconds format,
Longitude,
and the height above the WGS-84 reference ellipsoid in meters is shown.
Height
Refer to
Appendix D - Installing the GPS Antenna, About WGS-84
.
RMS PDOP,
The current RMS PDOP of the average position and the current count of
Average Count
averages are shown. If the reference position source is not AVG, then these two
values will be zero.
Summary of Contents for Meridian II
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