ashtech GG Surveyor - VTG: Velocity;Course Message

172 GG Surveyor GPS+GLONASS Reference Manual
The time displayed in the TTT message depends upon the selected constellation. If SYS=MIX, the
time depends upon the setting of the TSC parameter. If SYS=GPS, the time is GPS. IF SYS=GLO,
the time is UTC + 3 hours.
Table 6.84 outlines the TTT response message structure.
Example: Enable TTT event marker on port A
Set: $PASHS,NME,TTT,A,ON
Typical Response: $PASHR,TTT,6,20:41:02.0000000*OD
Table 6.85 outlines the example TTT response message.
VTG: Velocity/Course Message
$PASHS,NME,VTG,x,c
Enable/disable the velocity/course message on port x, where x is the output port, and
c is ON or OFF. This message is not output unless position is computed.
Example: Enable VTG message or port B
$PASHS,NME,VTG,B,ON
$PASHQ,VTG,x
The associated query command is $PASHQ,VTG,x where x is the optional output
port. This message does not output unless position is computed.
Table 6.84: TTT Message Structure
Field Description
d1 Day of GPS week, 1 to 7, where Sunday = 1
m1 Time in hours, minutes, seconds (hh:mm:ss.sssssss)
Table 6.85: Example TTT Response Message
Item Description
$PASHR,TTT Header
6 Day of week (Friday)
20:41:02.000000 0 Time
OD Message checksum in hexadecimal