AppendixAOutputtelegrams
Formatdescription
1hhmmss.ss=UTCoftheGGAorGNSxassociatedwiththissentence(hours,
minutes,seconds)
2x.x=Expectederrorinlatitude
3x.x=Expectederrorinlongitude
4x.x=Expectederrorinaltitude
5xx=IDnumberofmostlikelyfailedsatellite,GPS:1-32,WAAS:33-64,
GLONASS:65-96
6x.x=Probabilityofmisseddetectionformostlikelyfailedsatellite
7x.x=Estimateofbiasinmetresonmostlikelyfailedsatellite
8x.x=Standarddeviationofbiasestimate
9*hh=Checksum.
A.6GGAmessages
TheGGAmessagecontainstime,positionandGPS/GLONASSdata.Themessageisas
speciedinNMEA0183version3.0.Themessagestructureisasfollows:
Format
$--GGA,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x,xx,x.x,x.x,M,x.x,M,
x.x,xxxx*hh
Formatdescription
1hhmmss.ss=UTCofposition(hours,minutes,seconds)
2llll.ll=Latitude(degrees,minutesandfractionsofminutes)
3a=Latitudesector,N-NorthorS-South
4yyyyy.yy=Longitude(degrees,minutesandfractionsofminutes)
5a=Longitudesector,E-EastorW-West
6x=GPSQualityindicator:0=Fixnotvalid,1=GPS/GLONASSx,2=
DGPS/DGLONASSx,5=FloatRTKx(HP/XPcorrectionsused).Thiseld
shallnotbeanulleld.
7xx=Numberofsatellitesinuse,00-12
8x.x=HDOP-horizontaldilutionofprecision00.0to99.9
9x.x=Altitude,reference:mean-sea-level(geoid)
10M=Altitudeunit,M=metres.
11x.x=Geoidalseparation:thedifferencebetweentheWGS-84ellipsoidand
mean-sea-level(geoid)
12M=Geoidalseparationunit,M=metres
13x.x=Ageofdifferentialcorrections,inseconds.0whenDGPSnotused
G210-14/3.0
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