Leica GR10, Руководство по эксплуатации

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Appendix B: NMEA Messages
277
B3: GGA - Global Positioning System Fix Data
Syntax
$--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>
Description of fields
Field Description
$--GGA Header including Talker ID
hhmmss.ss UTC time of position
llll.ll Latitude (WGS 1984)
a Hemisphere, North or South
yyyyy.yy Longitude (WGS 1984)
a East or West
x Position quality indicator
0 = Fix not available or invalid
1 = No real-time position, navigation fix
2 = Real-time position, ambiguities not fixed
3 = Valid fix for GNSS Precise Positioning Service mode, for example WAAS
4 = Real-time position, ambiguities fixed
xx Numb of satellites in use, 00 to 26. er
x.x HDOP
x.x Altitude of position marker above/below mean sea level in metres. If no orthometric
height is available the local ellipsoidal height will be exported. If the local ellipsoidal
height is not available either, the WGS 1984 ellipsoidal height will be exported.
M Units of altitude as fixed text M
x.x Geoidal separation in metres. This is the difference between the WGS 1984 earth
ellipsoid surface and mean sea level.
M Units of geoidal separation as fixed text M
x.x Age of differential GNSS data, empty when D PS not used G
xxx x Differential reference station ID, 0000 to 1023
*hh Checksum
<CR> Carriage Return
<LF> Line Feed
Examples
User defined Talker ID = GN
$GNGGA,113805.50,4724.5248541,N,00937.1063044,E,4,13,0.7,1171.281,M,-703.398,M,0.26,0000*42