GLOBALSAT ET-314 GPS Engine Board - Manual (Page 9)

ET-314AC
High Performance GPS Engine Board
2010/4/1
- 9 -
SOFTWARE COMMAND
NMEA Output Command
GGA - Global Positioning System Fixed Data
Note – Fields marked in italic
red
apply only to NMEA version 2.3 (and later) in this NMEA
message description
Table A-1 contains the values for the following example:
$GPGGA,161229.487,3723.2475,N,12158.3416,W,1,07,1.0,9.0,M,,,,0000*18
Table A-1 GGA Data Format
Name Example Units Description
Message ID $GPGGA GGA protocol header
UTC Time 161229.487 hhmmss.sss
Latitude 3723.2475 ddmm.mmmm
N/S Indicator N N=north or S=south
Longitude 12158.3416 dddmm.mmmm
E/W Indicator W E=east or W=west
Position Fix Indicator 1 See Table A-2
Satellites Used 07 Range 0 to 12
HDOP 1.0 Horizontal Dilution of Precision
MSL Altitude 1 9.0 meters
Units M meters
Geoid Separation 1 meters
Units M meters
Age of Diff. Corr. second Null fields when DGPS is not used
Diff. Ref. Station ID 0000
Checksum *18
<CR><LF>
End of message termination
Table A-2 Position Fix Indicator
Value Description
0
Fix not available or invalid
1 GPS SPS Mode, fix valid
2 Differential GPS, SPS Mode , fix valid
3-5 Not supported
6 Dead Reckoning Mode, fix valid