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MiLLennium GPSCard SW Version 4.503/4.52 Command Descriptions Manual Rev 2 23
Before initializing, ensure that the data link with the reference station has been properly set up. As well, ensure that
the COM port which is to receive the differential data is set up to match the bit rate and protocol settings of the
reference station broadcast data.
Establishing differential mode of operation at the rover receiver is primarily a one-step process whereby the accept
command is used to enable reception of observation data from the reference station.
ACCEPT COMMAND
The accept command is primarily used to set the GPSCard’s COM port command interpreter for acceptance of
various data formats (see the ACCEPT command in Chapter 2, Page 24 and Appendix C, Page 81).
Syntax
Example:
accept com2 rtcm
Once intitialized, the rover GPSCard receiver will operate in single point mode until the differential messages are
received. If the data messages are lost, the GPSCard will revert to single point positioning until the pseudorange
correction messages are restored.
NOTE: Ensure that the GPSCard RTCMRULE settings agree with the bit rule being transmitted by the RTCM
reference station. Unless otherwise set, all GPSCards default to 6CR.
LOG POSITION DATA AND OTHER USEFUL DATA
The GPSCard remote receiver has many options for information data logging. To monitor position status, the user
may find the PRTKA/B logs to be the most informative. Other options exist, such as POSA/B and GPGGA. As
well, velocity data can be found in the VLHA/B, SPHA/B and GPVTG logs. It is really up to your specific
applications as to the full range of logs you require.
ACCEPT port mode
Range Value Default