129
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
