This message response is summarized in the following table:
Data Field Description
$>JGEO Message header.
Sent=1575.4200 Frequency sent to the digital signal processor
Used=1575.4200 Frequency currently used by the digital signal processor
PRN=prn WAAS satellite PRN number
Lon=-lon Longitude of the satellite
El=ele Elevation angle from the receiver’s antenna to the WAAS satellite, referenced to the horizon.
Az=az Azimuth from the receiver’s antenna to the WAAS satellite, referenced to the horizon.
To monitor this information for both WAAS satellites, add the ‘,ALL’
variable to the $JGEO message as follows:
$JGEO[,ALL] <CR><LF>
This will result in the following output messages:
$>JGEO,Sent=1575.4200,Used=1575.4200,PRN=122,Lon=-
54,El=9.7,Az=114.0
$>JGEO,Sent=1575.4200,Used=1575.4200,PRN=134,Lon=178,El=5.
0,Az=252.6
As can be seen from this output, the first message is identical to the output
from the $JGEO query, however, the second message provides information
on the WAAS satellite not being currently used. Both outputs follow the
format in the previous table for the $JGEO query.
5.3 $JASC,RTCM
This command allows you to configure the receiver to output, through the
MAIN (for DGPS MAX, Mini MAX or PowerMAX) or Primary Master (for
Vector products) port, correction data currently being used by one of the
three internal sensors. The correction data output is RTCM SC-104 even
though WAAS uses a different over-the-air protocol (RTCA)
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