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CHAPTER
5
Manual No. 016-0171-548 Rev. C
45
Chapter 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
Summary of Contents for Phoenix 300
Page 6: ...Table of Contents iv Phoenix 300 Installation Operation Manual ...
Page 12: ...Chapter 1 6 Phoenix 300 Installation Operation Manual ...
Page 16: ...Chapter 2 10 Phoenix 300 Installation Operation Manual ...
Page 52: ...Chapter 5 46 Phoenix 300 Installation Operation Manual ...
Page 62: ...Index 56 Phoenix 300 Installation Operation Manual ...