JRC JMR-5482-S - Position Integrity Alert Generation Conditions; Setting up the Generation Condition of the Position Monitor Warning

12-7 Section 12 Setting up Alerts
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12.6 Position Integrity Alert Generation
Conditions
[Operation procedure]
Open the [Position Integrity] dialogue by performing the following menu operations.
[Menu] button → Alert → Position Integrity
In this dialogue, [Position monitor warning] issuing conditions and [HDOP Limit] can be set.
12.6.1 Setting up the generation condition of the
Position monitor warning
Enter the following threshold value for issuing a position monitor warning.
Position Difference Limit:
The difference in distances when two GPS positions are compared at every second is used as a
threshold value. Specify the difference in a range between 0.010 and 9.990 NM.
Memo
[Position Difference Limit] functions when two GPS sytems are installed.
Radius Limit (GPS):
The radius of a monitoring circle having the predicted position of a GPS 1 sec later at the centre is
used as a threshold value. If the position actually measured is not within the time monitoring circle
specified in [Time Limit], it will be subjected to an alert. Specify the radius limit in a range between 10
and 100 m.
Radius Limit (DGPS):
The radius of a monitoring circle having the predicted position of DGPS 1 sec later at the centre is used
as a threshold value. If the position actually measured is not within the time monitoring circle specified
in [Time Limit], it will be subjected to an alert. Specify the radius limit in a range between 10 and 100 m.
Time Limit:
The time during which the position actually measured by a GPS/DGPS deviates from the monitoring
circle is used as a threshold value. The time limit can be specified in a range between 1 and 29 s.
12.6.2 Setting up the HDOP exceeded caution
generation condition
Select HDOP threshold limit value in the [HDOP exceeded caution] combo box.
Select either one of [4], [10] and [20].