Consilium SELUX ST, Installation And Service Manual

Page: 48 / 180

SERIAL INTERFACE SPECIFICATION
2.13 Rev. E
GGA – Global positioning system (GPS) fix data
Time, position and fix-related data for a GPS receiver.
Differential reference station ID, 0000-1023
Age of differential GPS data (see Note 2)
Units of geoidal separation,m
Geoidal separation (see Note 3)
Units of antenna altitude, m
Antenna altitude above/below
mean sea level (geoid)
Horizontal dilution of precision
$--GGA, hhmmss.ss, llll.ll, a, yyyyy.yy, a, x, xx, x.x, x.x, M, x.x, M, x.x, xxxx*hh<CR><LF>
Number of satellites in use, 00-12, may
be different from the number in view
GPS quality indicator (see Note 1)
Longitude E/W
Latitude N/S
UTC of position
NOTE 1
All GPS quality indicators in headings 1 through 8 are considered “valid”.
The heading “0” is the only
“invalid” indicator. The GPS quality indicator field should not be a null field.
0 = fix not available or invalid
1 = GPS SPS mode
2 = differential GPS, SPS mode
3 = GPS PPS mode
4 = Real Time Kinematic. Satellite system used in RTK mode with fixed integers
5 = Float RTK. Satellite system used in RTK mode with floating solution
6 = Estimated (dead reckoning) mode
7 = Manual input mode
8 = Simulator mode