iSXblue/SXBlue II GNSS Series Technical Reference Manual
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Table 5-4 SBAS Commands
Message
Description
$JWAASPRN
This message is used to reconfigure the WAAS and WAAS compatible PRN numbers (for use with
other Space Based Augmentation Systems (SBAS) like EGNOS, MSAS, GAGAN)
$JGEO
This command is used to poll the WAAS demodulator for information relating to your current location
and WAAS satellites
$JRD1
This command is used to poll the iSXBlue/SXBlue II GNSS for SBAS diagnostic information
$JASC,RTCM
This feature allows you to configure the iSXBlue/SXBlue II GNSS to output RTCM data from the
WAAS demodulator
The following subsections provide detailed information relating to the use of each command.
Note - Please ensure that you save any changes that you wish to survive beyond the current power-
up by using the $JSAVE command and wait for the ‘
$> Save Complete’
response.
5.3.1
$JWAASPRN
This command allows you to both poll the GPS engine for the SBAS PRN’s in memory, and change
them, if desired.
To poll the receiver for the current SBAS PRN’s, send the following message:
$JWAASPRN<CR><LF>
There are no data fields to specify in this message. The receiver will respond with the following message:
$>JWAASPRN,prn1,prn2
Where ‘prn1’ indicates the first PRN number and ‘prn2’ indicates the second PRN number. The PRN
numbers for WAAS are 133 and 138 (PRN 135 has been lost). EGNOS is currently using PRN 120 and
126 but also has PRN 124 (for industry testing). MSAS currently uses PRN numbers 129 and 137.
To change from the current PRN numbers, the following message should be used:
$JWAASPRN[,sv1[,sv2]] <CR><LF>
Where ‘sv1’ is the PRN number of the first SBAS satellite and ‘sv2’ is the PRN number of the second
SBAS satellite. Either ‘sv1’ or both ‘sv1’ and ‘sv2’ may be specified.
The iSXBlue/SXBlue II GNSS will reply with the following response:
$>
If you wish to return the unit to automatic SBAS tracking, the following command should be sent to the
receiver:
$JWAASPRN,,,AUTO <CR><LF>
The iSXBlue/SXBlue II GNSS will reply with the following response:
