Page 66 951/952 Operator’s Manual Rev. B
Chapter 5 - Determining Position Coordinates
For details on optimizing these numbers, see the Northstar
951/952 Installation Manual.
At the bottom of the DGPS STATUS screen, a summary of
DGPS operation is displayed. You may see one of the following
status messages:
Table 3: Definitions of noise levels
Noise level value Meaning
200 or less excellent
1,000 – 3,000 typical at night
5,000 – 10,000 thunderstorm
Table 4: Definitions of DGPS status messages
DGPS message Meaning
NO CORRECTIONS
Beacon sensor status message is being reviewed, but no SC-104
DGPS corrections are present.
NOT INSTALLED
No beacon sensor status message is being received, nor has an
external DGPS source been chosen.
SC-104 IN OK
An external source has been chosen, and the required data is being
received.
SC-104 IN FAIL
An external source has been chosen, but the required data isn’t
being received.
RESULTS UNKNOWN
The communication link to the GPS sensor has failed.
BCN UNHEALTHY
The beacon station in use is either unhealthy or unmonitored.
DISABLED
DGPS has been turned off by the user (to enable DGPS, see
“Changing receiver options” on page 164).
INIT OR SYNCH
The GPS sensor is trying to initialize the messages from the beacon
sensor.
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