iSXblue/SXBlue II GNSS Series Technical Reference Manual
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powering it for the first time in Europe after it has been tested in Canada). This will allow it to begin the
acquisition process for the closest SBAS spot beams. This will save some time with acquisition of the
SBAS service, however, use of this message is typically not required due to the quick overall startup time
of the iSXBlue/SXBlue II GNSS receiver. It is preferable to set SBAS acquisition to specific PRN
number or for Automatic search mode using the $JWAASPRN command in section 4.4.
This command has the following layout:
$JPOS,lat,lon<CR><LF>
Where ‘lat’ and ‘lon’ have the following requirements:
Position Component
Description
lat
Latitude component must be entered in decimal degrees. This component does not have
to be more accurate than half a degree.
lon
Longitude component must be entered in decimal degrees. This component does not have
to be more accurate than approximately a half degree.
Note – This command is not normally required for operation of the SXBlue II GPS.
5.2.12
$JQUERY, GUIDE
This command is used to poll the iSXBlue/SXBlue II GNSS for its opinion on whether or not it is
providing suitable accuracy after the both SBAS and GPS have been acquired (up to 5 min). This feature
takes into consideration the download status of the SBAS ionospheric map and also the carrier phase
smoothing of the unit.
This command has the following format:
$JQUERY,GUIDE<CR><LF>
If the iSXBlue/SXBlue II GNSS is ready for use with navigation or positioning with optimum
performance, it will return the following message:
$>JQUERY,GUIDE,YES<CR><LF>
Otherwise, it will return the following message:
$>JQUERY,GUIDE,NO<CR><LF>
5.2.13
$JRESET
This command is used to reset the GPS engine inside the iSXBlue/SXBlue II GNSS to its default
operating parameters. The $JRESET command does the following:
• Turn off outputs on all ports
• Save the configuration
• Set the configuration to its board-level defaults (refer to the table below)