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C NMEA-0183 Messages
78 AgGPS 332 GPS Receiver User Guide
C.1 Introduction
Trimble AgGPS receivers output NMEA (National Marine Electronic
Association) messages for GPS position data transfer between
electronics equipment. Information on the NMEA-0183
communication standard for GPS receivers is available at
www.nmea.org.
This appendix describes NMEA-0183 standard messages that are
configured using TSIP command packets.
Other messages are supported only when specific Trimble options are
installed on the receiver. Messages beginning with PTNL are Trimble
proprietary messages.
C.2 NMEA-0183 Message Structure
NMEA-0183 messages are strings of comma-delimited text. Figure C.1
shows the structure of an
NMEA-0183 message.
Figure C.1 Example showing NMEA-0183 message structure — ZDA
$GPZDA,
220320.0, 26, 06, 2004, -5, 15 *52
Checksum
Sentence ID
Field 1
Field 2
Field 3
Field 4
Field 5
Comma Delimiter
Field 6
Asterisk Delimiter