SkyTraq PX1172R - NMEA GSV - GNSS Satellites in View; GSV Structure and Field Explanations

20
www.skytraq.com.tw
GSV–GNSSSatellitesinView
Numberofsatellites(SV)inview,satelliteIDnumbers,elevation,azimuth,andSNRvalue.Foursatellitesmaximumper
transmission. 

Structure:
$GPGSV,x,x,xx,xx,xx,xxx,xx,…,xx,xx,xxx,xx,x*hh<CR><LF>
1234567456789

Example: 
$GPGSV,3,1,10,24,83,125,48,193,66,057,44,21,53,277,45,15,43,034,47,1*58<CR><LF>
$GPGSV,3,2,10,20,40,325,43,05,16,113,40,13,15,050,39,12,14,146,42,1*6E<CR><LF>
$GPGSV,3,3,10,10,13,314,,32,06,261,,1*62<CR><LF>
$GPGSV,2,1,05,24,83,125,49,193,66,057,44,15,43,034,45,05,16,113,36,6*5B<CR><LF>
$GPGSV,2,2,05,12,14,146,37,6*57<CR><LF>
$GBGSV,3,1,09,13,65,247,45,06,60,334,43,03,59,204,41,26,58,153,47,1*7E<CR><LF>
$GBGSV,3,2,09,16,57,325,45,01,53,142,42,21,52,046,47,04,38,118,,1*7A<CR><LF>
$GBGSV,3,3,09,07,20,169,37,1*40<CR><LF>
$GBGSV,2,1,07,13,65,247,47,06,60,334,47,03,59,204,47,16,57,325,47,3*7C<CR><LF>
$GBGSV,2,2,07,01,53,142,49,04,38,118,45,07,20,169,43,3*44<CR><LF>
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Field Name Example Description
1 Numberofmessage 3 TotalnumberofGSV messagestobetransmitted(1‐5)
2 Sequencenumber 1 SequencenumberofcurrentGSVmessage
3 Satellitesinview 10 Totalnumberofsatellitesinview(00~20)
4 SatelliteID 24 01~ 32areforGPS;33 ~ 64areforWAAS(PRNminus87);193
~197areforQZSS;65~88areforGLONASS(GLPRN);01~36
areforGALILEO(GAPRN);01~37areforBDS(BDPRN).GPS,
GLONASS,GALILEOandBDSsatellitesaredifferentiatedbythe
GNSSsystemIDintable3.Maximally4satellitesareincludedin
eachGSVsentence.
5 Elevation 83 Satelliteelevationindegrees,(00~90)
6 Azimuth 125 Satelliteazimuthangleindegrees,(000~359)
7 SNR 48 C/NoindB(00~99)
Nullwhennottracking
8 SignalID 1 SignalID
*
9 Checksum 58
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