Specifications

Command/Response Formats 155
Commands
Example: $PASHQ,GGA <enter>
$GPGGA
The response message is in the form:
$GPGGA,m1,m2,c3,m4,c5,d6,d7,f8,f9,M,f10,M,f11,d12*cc <enter>
Table 6.85: GGA Message Structure
Parameters Description Range
m1 Current UTC time of position fix in hours, minutes, and
seconds (hhmmss.ss)
00-235959.90
m2 Latitude component of position in degrees and decimal minutes
(ddmm.mmmmmm)
0-90
c3 Direction of latitude N= North, S= South N/S
m4 Longitudinal component of position in degrees and decimal
minutes (dddmm.mmmmmm)
0-180
c5 Direction of longitude E = East, W= West E/W
d6 Position type
0. Position not available or invalid
1. Autonomous position
2. RTCM differential corrected position or CPD float position
3. CPD fixed position
0, 1, 2, 3
d7 Number of GPS satellites being used in the position
computation
3 - 12
f8 Horizontal dilution of precision (HDOP) 0 - 99.9
f9 Geoidal Height (Altitude above mean sea level) -1000 to 18.000
M Altitude units M = meters ‘M’
f10 Geoidal separation in meters ±999.999
M Geoidal separation units M = meters ‘M’
f11 Age of differential corrections (seconds) 0-999 (RTCM
mode)
0-99 (CPD)
d12 Base station ID (RTCM only) 0-1023
*cc checksum