Position References
8.6
Position Reference Systems Settings
– Reference System Location. The location on the vessel (relative to its gravity center) of antenna or sensor head for
the different reference systems, may be specified by the operator
– Manual weight correction
– Manual and auto-change of the Origin Reference
8.7
Position Reference Failure Detection
Prediction test
– detection of sudden jumps based on model-based Kalman filters family.
Median test
– detection of Ref-systems slow drift. Depending on system parameters, drifted ref-system will be rejected
or alarm generated
Variance test
– reduction of weights in accordance to noise variance
Signal droup-out test
– detection of signal drop-out and signals redundance
Freeze test
– detection of repeated measurements for a long period of time, when there are no recent data
8.8
Ref-system Interface and Operations
8.8.1
General
Ref Window displays the position reference systems data. An example of Ref Window is shown in Figure 8.7.
Figure 8.7: The position reference system window
Ref Window consists of two sub-windows — lower and upper. Upper Ref-Window can be in status
View
or
Param
.
Lower — in status
Graph
or
Plot
.
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