Raven Phoenix 300 - Chapter 5 Sample NMEA Message Structure

CHAPTER
5
Manual No. 016-0171-548 Rev. C 45
C hapter 5 Sample NMEA
Message Structure
The following example of the GGA message string is an example the typical format of National Marine
Electronics Association (NMEA) messages:
TABLE 1. Message Structure Disambiguation
Field Description Field Description
$ Message Flag 6 Horizontal Dilution of Precision
GP Message Source (GPS) 7 Antenna Altitude Ref: Sea Level (geoid)
GGA Type of Message 8
Units of Antenna Altitude (meters in
example)
1 Universal time coordinate (UTC) of Position 9 Geoidal Separation
2 Latitude, North or South 10
Units of Geoidal Separation (meters in
example)
3 Longitude, East or West 11 Age of Differential Data, seconds
4 GPS Quality Indicator (mode) 12 Reference Station ID
5 Number of Satellites in use 13 Checksum
$GPGGA,171741,3019.3909,N,09741.8629,W,2,08,00.9,+00180, M, x.x,M, 003,0800*78
Type of Message
Message of Source
Message Flag
Field 1
Field 8
Field 4
Field 7
Field 6
Field 5
Field 2
Field 3
Field 9
Field 11
Field 10
Field 13
Field 12