Chapter 5 - Understanding Position Coordinates
Page 5-6
961 Operations and Reference Manual Rev. D
Status messages
A message about DGPS operations is displayed at the lower
half of the
GPS SATELLITE STATUS
screen. These messages
are described in ”Table 3: DGPS status messages” below.
The 961’s DGPS signal-quality information is available from
either the internal differential receiver or a Northstar external
Table 3: DGPS status messages
Message
Meaning
IN USE/ OK
DGPS corrections are being received and used.
OLD CORRECTIONS
No DGPS corrections have been received within the
time limit. The 961 has returned to non-differential
operation.
NOT INSTALLED
A differential receiver isn’t installed.
BEACON UNHEALTHY
The differential (beacon) transmitter reports technical
problems.
UNHEALTHY SATELLITES
Data received from the satellites is unreliable.
BAD UDRE/IODE
Data received from the satellites is unreliable.
ACQUIRING SATELLITES
Either the GPS receiver can’t operate until it has
received ephemeris data from the satellites, or else
the receiver isn’t tracking enough satellites yet for a
fix.
DGPS NOT IN USE, BUT AVAILABLE
DGPS was turned off at the
RECEIVER SETUP
screen.
USER TURNED OFF
The 961 beacon receiver is present, but the DGPS
system has been disabled (under the Receiver Setup
function).
SEARCHING
The system is waiting for the 961 beacon receiver to
report fully synched differential data.
POOR DOPS
The monitor station that measures differential data
currently has poor satellite geometry.
TOO FEW SATS
There are too few satellites available.
Содержание 961X
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Страница 8: ...Page viii 961 Operations and Reference Manual Rev D ...
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Страница 58: ...Chapter 2 Introducing the 961 Page 2 16 961 Operations and Reference Manual Rev D ...
Страница 140: ...Chapter 5 Understanding Position Coordinates Page 5 12 961 Operations and Reference Manual Rev D ...
Страница 172: ...Chapter 7 Creating Avoidance Points Page 7 16 961 Operations and Reference Manual Rev D ...
Страница 198: ...Chapter 8 Creating Routes Page 8 26 961 Operations and Reference Manual Rev D ...
Страница 262: ...Chapter 12 Alarms TideTrack and Currents Page 12 16 961 Operations and Reference Manual Rev D ...
Страница 348: ...Chapter 14 Service and Maintenance Functions Page 14 20 961 Operations and Reference Manual Rev D ...
Страница 374: ...Index Page I 12 961 Operations and Reference Manual Rev D ...