be set to a lower value since the filtering window would be shorter, resulting
in a more responsive measurement. However, if a vessel is very large and
has much more resistance to change in its motion, this value can be
increased to reduce measurement noise. The following formula provides
some guidance on how to set this value initially; however, we recommend
that you test how the revised value works in practice. If you are unsure
what the best value for this setting is, it’s best to be conservative and leave it
at the default setting.
spdtau (in seconds) = 10 / maximum acceleration (in m/s
2
)
You may query the Vector for the current heading time constant by issuing
the same command without an argument.
$JATT,SPDTAU<CR><LF>
Note - If you are unsure of the best value for this setting, it’s best
to be conservative and leave it at the default setting of 0.0 seconds.
8.14 $JATT,HBIAS
You may adjust the heading output from the Vector in order to calibrate the
true heading of the Antenna Array to reflect the true heading of the vessel
using the following command.
$JATT,HBIAS,x<CR><LF>
Where x is a bias that will be added to the Vector’s heading, in degrees.
The acceptable range for the heading bias is -180.0° to 180.0°. The default
value of this feature is 0.0°.
To determine what the current heading compensation angle is, send the
following message to the Vector.
$JATT,HBIAS<CR><LF>
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