ashtech DG14, Reference Manual

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NMEA Commands 241
NMEA Commands
Typical GRS message:
$GPGRS,180257.50,1,019.3,004.6,-009.3,-005.6,-004.5,005.4*49
Table 8.13 outlines the response message.
GSA: DOP and Active Satellites
$PASHS,NME,GSA,x,s,[f]
Enable or disable DOP and active satellite message to be sent out to the serial port,
where x is the output port, and s is ON or OFF, and f is the optional message output
rate ranging from 0.05 to 999 seconds depending on the measurement update rate
option installed.
The receiver does not output this message if a position is not computed.
If the command is set without a period, the DG16 uses the period set by the
$PASHS,NME,PER command If the $PASHS,NME,PER command is issued after
this message period has been set, the period resets to the PER setting.
Example
Enter the following command to enable GSA message on port B.
$PASHS,NME,GSA,B,ON
$PASHQ,GSA,[c1]
This command queries the GSA message, where c1 is the optional port designator
for the output of the response. If a port is not specified, the receiver sends the
response to the current port.
Table 8.13. Typical GRS Message
Field Description
$GPGRS Header
180257.50 UTC time of position fix
1 Pseudo-range residual error calculation mode
019.3 Range residual for first satellite in GSA message
004.6 Range residual for second satellite in GSA message
-009.3 Range residual for third satellite in GSA message
-005.6 Range residual for fourth satellite in GSA message
-004.5 Range residual for fifth satellite in GSA message
005.4 Range residual for sixth satellite in GSA message
*49 Checksum