ashtech DG16 - DUG: GPS;UTC Time Difference

Receiver Commands 109
Receiver Commands
Example
Enter the following command to select New Zealand Geodetic Datum 1949 for
position computation:
$PASHS,DTM,GEO
You can view the current reference datum selection with the $PASHQ,PAR
command and checking the DTM field.
DUG: GPS/UTC Time Difference
$PASHQ,DUG,[c1]
This command queries the time difference between UTC time and GPS time; 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.
$PASHR,DUG
The response message is output in the format:
$PASHR,DUG,<Binary Data String + Checksum>
Table 6.17 outlines the binary data string parameters.
International 1924 6378388.0 297.00 0.00336700336700
South American 1969 6378160.0 298.25 0.00335289186924
World Geodetic System 1972
(WGS-72)
6378135.0 298.26 0.00335277945417
World Geodetic System 1984
(WGS-84)
6378137.0 298.257223563 0.00335281066475
DEFAULT SETTING
DTM—WGS-84
Table 6.17. $PASHR,DUG Format
Binary Type Size Content
unsigned short 2 Reference week
unsigned short 2 Reference time
unsigned short 2 GPS-UTC time (seconds)
Table 6.16. Predefined Ellipsoids
Ellipsoid a (metres) 1/f f