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RGM-3550LP User Manual
Table 2
GGA Data Format
Name Example
Units Description
Message ID
$GPGGA
GGA protocol header
UTC Position
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 2-1
Satellites Used
07
Range 0 to 12
HDOP
1.0
Horizontal Dilution of Precision
MSL Altitude
9.0
meters
Units M
meters
Geoid Separation
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 3 Position Fix Indicators
Value Description
0
Fix not available or invalid
1
GPS SPS Mode, fix valid
2
Differential GPS, SPS Mode, fix valid
3
GPS PPS Mode, fix valid
GLL-Geographic Position –Latitude/Longitude
Table 3 contains the values of the following
Example: $GPGLL, 3723.2475, N, 12158.3416, W, 161229.487, A*2C
