ashtech DG16 Reference Manual page 251

Grid Coordinates
GDC:
$PASHS,NME,GDC,c1,s,[f]
This command enables or disables the $PASHR,GDC message. c1 is the port
designator (A or B) for message output. s3 is ON or OFF. f is the optional message
output rate ranging from 0.05 to 999 seconds depending on the measurement
update rate option installed.
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.
$PASHQ,GDC,[c1]
This command queries the current position according to the user-defined grid
coordinate system selected through the UDG command, 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. The response message does not output
unless the following three conditions are met:
1. The receiver is computing positions.
2. A grid coordinate system has been selected through the UDG command.
3. The conversion from geodetic coordinates to the selected grid coordinate
system has been enabled through the GRD command.
$PASHR.GDC
The response is in the format:
$PASHR,GDC,m1,s2,f3,f4,d5,d6,f7,f8,M,f9,M,d10,s11,s12*cc
Table 8.5 outline the message format:.
Parameter
m1 UTC of position in hours, minutes, and decimal seconds
(hhmmss.ss)
s2 Map projection type
f3 Easting (x) of the user grid coordinate (meters)
f4 Northing (y) of the user grid coordinate (meters)
NMEA Commands
Table 8.5. GDC Message Structure
Description Range
000000.00 to
235959.90
EMER, TM83,
OM83, LC83,
STER, LC27,
Tm27, TA22
-9999999.999 to
+9999999.999
-9999999.999 to
+9999999.999
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