ZyCast
SG-289 User’s Manual v1.1
18
$GPGSA
This message transfers DOP and active satellites information. Following is an example.
$GPGSA,A,3,07,02,26,27,09,04,15, , , , , ,1.8,1.0,1.5*33
The $GPGSA message structure is shown below:
Field Example
Unit
Notes
Message ID
$GPGSA
GSA protocol header.
Mode A
M: Manual, forced to operate in selected 2D
or 3D mode.
A: Automatic switching between modes.
Mode 3
1
Fix not available.
2
2D position fix.
3
3D position fix.
Satellites Used
(1)
07
SV on channel 1.
Satellites Used
(1)
02
SV on channel 2.
…
..
Satellites Used
(1)
SV on channel 12.
PDOP 1.8
HDOP 1.0
VDOP 1.5
Checksum *33
<CR> <LF>
Message terminator.
(1) Satellites
used in solution.
