5.2 LD8 output sentences
5.2.5 GSA sentence
The NMEA GSA sentence provides time and time zone information.
GSA sentence structure & example
$GNGSA, a, 1, cc, cc, cc, cc, cc, cc, cc, cc, cc, cc, cc, cc, d.d, e.e, f.f *hh
$GNGSA, a, b, 02, 12, 15, 20, 21, 24, 25, 29, 32, , , , 1.7, 0.9, 1.5 *58
GSA sentence defined
Field Content
GSA GNSS DOP and Active Satellites
a
Mode (M = Manual mode, forced to operate in 2D or 3D mode,
A = Automatic mode, allowed to automatically switch 2D/3D)
b Fix (1 = Not available, 2 = 2D, 3 = 3D)
cc
PRN ID numbers of satellites used in solution a total of 12 fields
GPS = 1 to 32
GLONASS = 65 to 96
As shown in the above example, if less than 12 satellites for one constellation are used null
values will be output in the string.
d.d PDOP
e.e HDOP
f.f VDOP
hh Checksum
44
LD8 Operations Manual
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