Dug: Utc-Gps Time Difference - ashtech GG Surveyor Reference Manual

computed positions based on a different datum are desired, select the datum from Appendix A, or
issue the command $PASHS,UDD (user-defined datum).
Example: Set the datum to International 1924.

DUG: UTC-GPS Time Difference

$PASHQ,DUG
Displays information on the time difference between UTC and GPS system times.
The response message is in the form:
where struct is in binary format as listed in Table 6.8
Type
unsigned
short
unsigned
short
unsigned
short
unsigned
short
unsigned
short
unsigned
short
unsigned
short
Total bytes 14
80
$PASHS,DTM,AST<Enter>
$PASHR,DUG,struct
Table 6.8: GPS-UTC Time Codes
Size
Content
(bytes)
2 GPS week of current GPS-
UTC time correction
2 GPS system time of current
GPS-UTC time correction
2 Current GPS-UTC time
correction
2 GPS week of correction's
change
2 Day of correction's change
2 New GPS-UTC time correction seconds
2 Checksum computed by
breaking the structure into
shorts, adding them together,
and taking the least significant
16 bits of the result.
Units
week numbers
12
seconds x 2
(4096)
seconds
week numbers
1...7
GG Surveyor GPS+GLONASS Reference Manual
Example
Actual
Interpretation
Number
897 week 897
123 12
123x2
seconds
11 11 seconds
834 week 834
1 day 1
11 11 seconds