164 G12 OEM Board & Sensor Reference Manual
MSG: Differential Base Station Data
$PASHS,NME,MSG,x,s,[f]
Enable/disable message containing RTCM reference (base) station message types
01, 03, 09, 16, 18, 19, 31, 32, 34, and 36 on port x, where x is the output port, and
s is ON or OFF, and [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 G12 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.
The G12 ignores this command unless it is sending or receiving differential corrections.
Example
Enable the MSG message on port A:
$PASHS,NME,MSG,A,ON
$PASHQ,MSG,[c1]
This command allows you to query for the MSG 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. This command is ignored if the G12 is not
sending or receiving differential corrections.
$GPMSG
The MSG messages contain base station status data for incoming or outgoing
RTCM messages. Fields containing base station ID number, current Z count,
current GPS time, and base station health status are common to all MSG
messages.
In addition to the foregoing data items, the MSG message generated for RTCM
message type 1 also contains pseudorange correction values (PRC), range rate
correction values (RRC), ephemeris data (IODE), and user differential range error
values (UDRE) referenced to the PRN number for each locked satellite. This
message can be set for output in one second increments.
The MSG message generated for RTCM message type 2 includes UDRE and IODE
data, but also contains delta pseudorange corrections (delta PRC) and delta range
rate corrections (delta RRC) for each locked satellite. This message can be set for
output in one minute increments.
G12RevD.book Page 164 Tuesday, April 2, 2002 4:33 PM
To Next Page
Loading...