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GGA: GNSS Position Message
$GPGGA,m1,m2,c3,m4,c5,d6,d7,f8,f9,M,f10,M,f11,d12*cc
GGK : GNSS Position Message
See Trimble documentation.
Parameter Description Range
m1 Current UTC time of position (hhmmss.ss)
000000.00-
235959.99
m2 Latitude of position (ddmm.mmmmmm)
0-90
0-59.999999
c3 Direction of latitude N, S
m4 Longitude of position (dddmm.mmmmmm)
0-180
0-59.999999
c5 Direction of longitude E,W
d6
Position type:
• 0: Position not available or invalid
• 1: Autonomous position
• 2: RTCM Differential (or SBAS Differential)
•3: Not used
•4: RTK fixed
•5: RTK float
• 6: Estimated (dead reckoning) mode
0-6
d7
Number of GNSS Satellites being used in the
position computation
3-26
f8 HDOP 0-99.9
f9,M
Altitude, in meters, above mean seal level.
“M” for meters
± 99999.999,M
f10,M Geoidal separation in meters. “M” for meters. ± 999.999,M
f11 Age of differential corrections, in seconds 0-600999
d12 Base station ID 0-4095
*cc Checksum *00-*FF
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