SOFTWARE COMMAND
NMEA Output Command
GGA-Global Positioning System Fixed Data
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,,,,0000*18
Table B-2 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
B-3
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
SiRF Technology Inc. does not support geoid corrections. Values are WGS84 ellipsoid heights.
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
GPS PPS Mode, fix valid
