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Examples
A.14
Syntax
NMEA Message Formats
Field
Description
x
Position quality
0 = Fix not available or invalid
1 = No real-time position, navigation fix
2 = Real-time position, ambiguities not fixed
3 = Real-time position, ambiguities fixed
5 = Real-time position, float
xx
Number of satellites in use. For $GNLLQ messages: The com-
bined GPS, GLONASS, Galileo and BeiDou satellites used in
the position.
x.x
Coordinate quality in metres
x.x
Altitude of position marker above/below mean sea level in
metres. If no orthometric height is available the local ellips-
oidal height will be exported.
M
Units of altitude as fixed text M
*hh
Checksum
<CR>
Carriage Return
<LF>
Line Feed
For NMEA v4.0:
Standard Talker ID = GPS only
$GPLLQ,154324.00,111414,546629.232,M,5250781.577,M,1,09,3.876,366.54
9,M*05
Standard Talker ID = GNSS
$GNLLQ,154119.00,111414,546629.181,M,5250782.747,M,1,20,3.890,367.39
3,M*1D
$GPLLQ,154119.00,111414,,,,,,09,,,*44
$GLLLQ,154119.00,111414,,,,,,07,,,*56
$GBLLQ,154119.00,111414,,,,,,04,,,*58
For NMEA v4.1:
Standard Talker ID = GPS only
$GPLLQ,154324.00,111414,546629.232,M,5250781.577,M,1,09,3.876,366.54
9,M*05
Standard Talker ID = GNSS
$GNLLQ,154149.00,111414,546629.191,M,5250782.727,M,1,20,3.880,367.38
7,M*1B
When more than one GNSS is active only $GNLLQ is output.
☞
RMC - Recommended Minimum Specific GNSS Data
$--RMC,hhmmss.ss,A,llll.ll,a,yyyyy.yy,a,x.x,x.x,xxxxxx,x.x,a,a*hh<CR><LF>
73
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