Rainbow Electronics GM862-GPS - Manual (Page 99)

GM862-GPS Software User Guide
1vv0300729 Rev. 5 - 05/07/07
Reproduction forbidden w ithout Telit Communications S.p.A. w ritten authorization - All Rights Reserved page 99 of 120
5.4.1 GGA - Global Positioning System Fixed Data
This sentence provides Time, position, and fix related data for a GPS Receiver
Table A 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 A
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
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 B
Value Description
0 Fix not a vailable or invalid
1 GPS SPS Mode, fi x valid
2 Differential GPS, SPS Mode, fi x valid
3-5 Not supported
6 Dead Reckoning Mode, fix valid