Table 3: Definitions Of Noise Levels; Table 4: Definitions Of Dgps Status Messages - NorthStar 951X Operator's Manual

Chapter 5 - Determining Position Coordinates
DGPS message
NO CORRECTIONS
NOT INSTALLED
SC-104 IN OK
SC-104 IN FAIL
RESULTS UNKNOWN
BCN UNHEALTHY
DISABLED
INIT OR SYNCH
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Noise level value
200 or less
1,000 – 3,000
5,000 – 10,000
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 4: Definitions of DGPS status messages

Meaning
Beacon sensor status message is being reviewed, but no SC-104
DGPS corrections are present.
No beacon sensor status message is being received, nor has an
external DGPS source been chosen.
An external source has been chosen, and the required data is being
received.
An external source has been chosen, but the required data isn't
being received.
The communication link to the GPS sensor has failed.
The beacon station in use is either unhealthy or unmonitored.
DGPS has been turned off by the user (to enable DGPS, see
"Changing receiver options" on page 164).
The GPS sensor is trying to initialize the messages from the beacon
sensor.

Table 3: Definitions of noise levels

Meaning
excellent
typical at night
thunderstorm
951/952 Operator's Manual Rev. B