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C NMEA 0183
218 Copernicus GPS Receiver
NMEA 0183 Message Options
The Copernicus GPS Receiver can output any or all of the messages listed in
Table C.3 and Table C.4. In its default configuration (as shipped from the factory), the
Copernicus GPS Receiver outputs two messages: GGA and VTG. These messages are
output at a 1 second interval with the “GP” ID and checksums. These messages are
output at all times during operation, with or without a fix. If a different set of
messages has been selected (using Packet 0x7A), and this setting has been stored in
Flash memory (using Packet 0x8E-26), the default messages are permanently
replaced until the receiver is returned to the factory default settings.
Another methodology for changing NMEA output messages is using the Trimble
proprietary NMEA commands listed in Table C.4. Use the NM command to select the
NMEA message, and the RT command to store the message in Flash Memory.
Note – The user can configure a custom mix of the messages listed in Table C.4. See
command packets 0xBC, 0x7A, and 8E-26 in Appendix A, and the NM and RT
command descriptions in this Appendix for details on configuring NMEA output.
C
WARNING – If too many messages are specified for output, you may need to increase the
unit’s baud rate.
.
Table C.3 Copernicus GPS Receiver NMEA 0183 Messages
Message Description
Default
Output
GGA GPS fix data
GLL Geographic position - Latitude/Longitude
GSA GPS DOP and active satellites
GSV GPS satellites in view
RMC Recommended minimum specific GPS/Transit data
Default
Output
VTG Track made good and ground speed
ZDA Time & Date