Vector Sensor Reference Manual 76
$JSMOOTH<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 LONG (15 minutes).
6.5 SBAS Commands
This section details the NMEA messages accepted by the internal SBAS engine of the Vector
Sensor system.
The following table provides a brief description of the commands supported by the SBAS
demodulator for its control and operation.
Table 6-4 SBAS Commands
Message Description
$JWAASPRN This message is used to reconfigure the WAAS PRN numbers for
use with other Space Based Augmentation Systems (SBAS)
$JGEO This command is used to poll the WAAS demodulator for
information relating to your current location and WAAS satellites
$JASC,D1 This command is used to poll the Vector Sensor for SBAS
diagnostic information
$JASC,RTCM This feature allows you to configure the Vector Sensor 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.
6.5.1 $JWAASPRN
This command allows you to both poll the Vector Sensor’s internal SBAS demodulator 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 122 and 134. EGNOS is currently using PRN 120 but also has PRN
131. The SBAS PRN numbers are described in more detail in Appendix C.
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