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Magellan GPS 315/GPS 320 55
GGA Global Positioning System Fix Data
1 2 3 4 5 6 7 8 9 10 11
GGA,hhmmss.ss,1111.11,a,yyyyy.yy,a,x,xx,x.x,x.x,M,x.x,
12 13 14
M,x.x,xxxx*hh
1 UTC of Position
2-3 Latitude - N/S
4-5 Longitude - E/W
6 GPS Quality Indicator
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
7 Number of satellites in use (00-12, may be different
from the number in view)
8 Horizontal dilution of precision
9 Antenna altitude above/below mean sea level
10 Units of antenna altitude, meters
11 Geoidal separation - difference between the WGS-84
earth ellipsoid and mean sea level (geoid), “-” =
mean sea level below ellipsoid
12 Units of geoidal separation, meters.
13 Age of Differential GPS data - Time in seconds since
last SC104 Type 1 or 9 update, null field when DGPS
is not used
14 Differential reference station ID, 0000-1023
GLL Geographic Position — Latitude/Longitude
1 2 3 4 5 6
GLL,1111.11,a,yyyyy.yy,a,hhmmss.ss,A*hh
1-2 Latitude, N/S
2-3 Longitude, E/W
4 UTC of position
6 Status A = Data valid
V = Data not valid