ashtech DG16 Reference Manual page 254

All fields are variable length fields.
Example:
Enter the following command to enable GGA on port A.
$PASHS,NME,GGA,A,ON
Enter the following command to output the standard GGA message.
$PASHS,GGA,STD
$PASHQ,GGA,c1
This command queries the GGA position 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.
$GPGGA
This message is not output unless positions are being computed. In addition to a
3-D position (latitude/longitude/altitude), the GGA message contains information
on the type of position fix (i.e., autonomous or differentially corrected), HDOP, and
current time. The DG16 can be set to output the GGA message at regular intervals
by using the command $PASHS,NME. The message is output in the format:
$GPGGA,m1,m2,c3,m4,c5,d6,d7,d8,f9,c10,d11,c12,d13,d14*hh
Table 8.7 outlines the message format.
Parameter
m1 UTC time (hhmmss.s) of the position fix
m2 Latitude of the position fix (ddmm.mmmmm)
c3 Latitude sector
m4 Longitude of the position fix (dddmm.mmmmm)
c5 Longitude sector
234
DEFAULT SETTING
GGA—FULL
Table 8.7. $GPGGA Message Format
Description
DG14 and DG16 Board & Sensor Reference Manual
Range (FUL) Range (STD)
0 to 235959.99 0 to 235959.99
0 to 9000.00000 0 to 9000.00000
N or S N or S
0 to 18000.00000 0 to 18000.00000
E or W E or W