Variable Description
HPR Horizontal Protection Radius (HPR). You will receive notification in the $PSAT,GBS message
that the horizontal error has exceeded this amount. The acceptable range for this value is
from 1 to 10000 meters. The default is 10m.
probHPR Maximum allowed probability that the position computed lies outside the HPR. The
acceptable range for this value is from 0.001% to 50%. The default is 5%.
probFALSE Maximum allowed probability that there is a false alarm (that is, that the position error is
reported outside of the HPR, but it is really within the HPR. The acceptable range for this
value is from 0.001% to 50%. The default is 1%.
When the $JRAIM message is sent without any arguments, the response will
show the current settings.
4.9 $JSMOOTH
There is a new command, $JSMOOTH that enables the user to change the
carrier smoothing interval between 15 minutes and 5 minutes. This
command was designed to offer the user flexibility for tuning in different
environments. You may find a slight improvement in positioning performance
using either the short or long smoothing interval depending on your
multipath environment. The default for this command is 15 minutes or
LONG. To change the smoothing interval to 5 minutes or SHORT, use the
following command.
$JSMOOTH,SHORT<CR><LF>
If you wish to change the smoothing interval to 15 minutes or LONG, use
the following command.
$JSMOOTH,LONG<CR><LF>
If you wish to request the status of this message, send the following
command. The status of this command is also output in the $JSHOW
message.
$JSMOOTH<CR><LF>
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