ashtech DG16 Reference Manual page 257

$PASHQ,GLL,[c1]
This command queries the GLL 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.
$GPGLL
This message is not output unless position is computed. The GLL message contains
a 2-D position (latitude/longitude only) and time of position fix. The DG16 can be
set to output the GLL message at regular intervals by using the command
$PASHS,NME. The message is output in the format:
$GPGLL,m1,c2,m3,c4,m5,c6,d7*hh
Table 8.9 outlines the message format.
Parameter
m1 Latitude of the position fix (ddmm.mmmmm)
c2 Latitude sector
m3 Longitude of the position fix (dddmm.mmmmm)
c4 Longitude sector
m5 UTC time (hhmmss.ss) of the position fix
c6 Status of the position fix (always A):
• A—Valid
• V—Invalid
d7 Positioning system mode indicator
• A—Autonomous mode
• D—Differential mode
• E—Estimated (dead reckoning) mode
• M—Manual input mode
• S—Simulator mode
• N—Data not valid
hh Checksum
Typical GLL message:
$GPGLL,3722.36223,N,12159.82741,W,170003.00,A,A*7F
NMEA Commands
Table 8.9. $GPGLL Message Format
Description Range
0° to 90°
N—North
S—South
0° to 180°
E—East
W—West
000000.00 to
235959.90
A, V
A, D, E, M, S, or N
2-character hex
237