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SOFTWARE COMMAND
NMEA Output Command
GGA - Global Positioning System Fixed Data
Note – Fields marked in italic
message description
Table B-2 contains the values for the following example:
$GPGGA,161229.487,3723.2475,N,12158.3416,W,1,07,1.0,9.0,M,-34.2,M,,0000*18
Table B-2 GGA Data Format
Name
Message ID
UTC Time
Latitude
N/S Indicator
Longitude
E/W Indicator
Position Fix Indicator 1
Satellites Used
HDOP
MSL Altitude
Units
1
Geoid Separation
Units
Age of Diff. Corr.
Diff. Ref. Station ID
Checksum
<CR><LF>
Table B-3 Position Fix Indicator
Value
Description
0
Fix not available or invalid
1
GPS SPS Mode, fix valid
2
Differential GPS, SPS Mode , fix valid
3
Not supported
6
Dead Reckoning Mode, fix valid
2012/7/30
red
apply only to NMEA version 2.3 (and later) in this NMEA
Example
Units
$GPGGA
161229.487
3723.2475
N
12158.3416
W
07
1.0
9.0
meters
M
meters
-34.2
meters
M
meters
second
0000
*18
Description
GGA protocol header
hhmmss.sss
ddmm.mmmm
N=north or S=south
dddmm.mmmm
E=east or W=west
See Table B-3
Range 0 to 12
Horizontal Dilution of Precision
Geoid-to-ellipsoid separation.
Ellipsoid altitude=MSL Altitude + Geoid
Separation
Null fields when DGPS is not used
End of message termination
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