SXBlue GPS Reference Manual
52
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.
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 SXBlue GPS 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 SXBlue GPS will reply with the following response:
$>
8.4.2 $JGEO
This message is used to display information related to the current frequency of SBAS,
and its location in relation to the SXBlue GPS’ antenna.
To query the SXBlue GPS for the currently used SBAS satellite information, use the
following query:
$JGEO<CR><LF>
The receiver will respond with the following data message:
$>JGEO,Sent=1575.4200,Used=1575.4200,PRN=prn,Lon=lon,El=ele,Az=az
This message response is summarized in the following table:
