Simrad HS52 GPS compass and DGPS navigator
34 20222360 / E
General
The General submenu includes the selections; height aiding,
accuracy level for integrity indication, velocity filtering,
position filtering, heading filtering, clock data output format,
NMEA id and number of decimals used in the NMEA
GGA/GLL position solution.
Height Aiding
For operations with weak satellite geometry the position output
can be made more accurate by using height aiding. For normal
operations height aiding should be set to Filter or Off. When
Filter or Fixed is selected, an initial height has to be entered.
The value to be entered in Init. height is the GPS height value
HGT shown in the position display window no. 1, see
Navigation/POS Display on page 46. The HGT value needs to
be observed and averaged over some minutes. Be aware that the
GPS input height value is the WGS84 antenna height (height of
the Sensor unit). The WGS84 antenna height might for some
locations differ from the mean sea level height with as much as
100m.
Note! Height aiding is active only with input of differential GPS.
Accuracy lvl
This parameter is used for selection of the preferred accuracy
level for the position solution. The integrity indication SAFE,
CAUTION and UNSAFE are set according to the accuracy
level. The POS-Q status bar will show reduced when the 95%
horizontal position accuracy is less than the selected level. For
further explanation see Monitoring on page 42.
Hdop Limit
This parameter is used for selection of the preferred HDOP
limit. The default value is 4 and the product will then be
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