SkyTraq PX1172R - NMEA VTG - Course Over Ground and Ground Speed; VTG Structure and Field Explanations; NMEA ZDA - TIME AND DATE; ZDA Structure and Field Explanations

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VTG–CourseOverGroundandGroundSpeed
Theactualcourseandspeedrelativetotheground.
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Structure:
GPVTG,x.x,T,,M,x.x,N,x.x,K,a*hh<CR><LF>
  12345
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Example: 
$GNVTG,000.0,T,,M,000.0,N,000.0,K,D*16<CR><LF>
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Field Name Example Description
1 Course 000.0 Truecourseovergroundindegrees(000.0~359.9)
2 Speed 000.0 Speedovergroundinknots(000.0~999.9)
3 Speed 000.0 Speedovergroundinkilometersperhour(000.0~1800.0)
4 Mode D Modeindicator
‘A’=Autonomousmode
‘D’=Differentialmode
‘E’=Estimated(deadreckoning)mode
‘M’=Manualinputmode
‘N’=Datanotvalid
‘P’=Precise
‘S’=Simulatormode
5 Checksum 16
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ZDA–TIMEANDDATE
UTC,day,month,yearandlocaltimezone
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Structure:
$GPZDA,hhmmss.sss,xx,xx,xxxx,xx,xx*hh<CR><LF>
1234567
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Example: 
$GNZDA,033010.000,11,12,2019,00,00*40<CR><LF>
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Field Name Example Description
1 UTCtime 033010.000 UTCtimeinhhmmss.ssformat(000000.00~235959.999)
2 UTCDay 11 UTCtime:day(01~31)
3 UTCMonth 12 UTCtime:month(01~12)
4 UTCYear 2019 UTCtime:year(4digitformat)
5 Localzonehour 00 Localzonehours(00~+/‐ 13)
6 Localzoneminutes 00 Localzoneminutes(00~59)
7 Checksum 40 Checksum
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