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Examples
A.8
Syntax
Description of fields
66
Field
Description
xxxx
Differential base station ID, 0000 to 1023
h
For NMEA v4.1. Navigation Status Indicator
S = Safe
C = Caution
U = Unstable
V = Navigation status not valid
*hh
Checksum
<CR>
Carriage Return
<LF>
Line Feed
For NMEA v4.0:
Standard Talker ID = GPS only
$GPGNS,150254.00,4724.5290110,N,00937.0837286,E,A,10,0.8,366.282,100.
143,,*33GNSS
Standard Talker ID = GNSS
$GNGNS,145309.00,4724.5293077,N,00937.0838953,E,AANA,22,0.5,367.326,
100.144,,*64
When more than one GNSS is active only $GNGNS is output.
☞
For NMEA v4.1:
Standard Talker ID = GPS only
$GPGNS,150219.00,4724.5290237,N,00937.0837225,E,A,10,0.8,366.329,100.
143,,,V*4FGNSS
Standard Talker ID = GNSS
$GNGNS,145339.00,4724.5292786,N,00937.0838968,E,AANA,22,0.5,367.334,
100.143,,,V*19
When more than one GNSS is active only $GNGNS is output.
☞
GSA - GNSS DOP and Active Satellites
$--GSA,a,x,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,x.x,x.x,x.x,h*hh<CR><LF>
Field
Description
$--GSA
Header including talker ID
a
Mode
M = Manual, forced to operate in 2D or 3D mode
A = Automatic, allowed to change automatically between 2D
and 3D
x
Mode
1 = Fix not available
2 = 2D
NMEA Message Formats
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