Altina GPS 9540 - Manual (Page 10)

5.4. GNSS DOP and Active Satellites (GSA)
Table 5-4 contains the values for the following example.
$GPGSA,A,3,07,02,26,27,09,04,15, , , , , ,1.8,1.0,1.5*33
Table 5-5 GSA Data Format
Name Example Units Description
Message ID $GPGSA GSA protocol header
Mode 1 A See Table 5-6
Mode 2 3 See Table 5-7
Satellite Used(1) 07 Sv on Channel 1
Satellite Used(1) 02 Sv on Channel 2
Satellite Used Sv on Channel 12
PDOP 1.8 Position Dilution of Precision
HDOP 1.0 Horizontal Dilution of Precision
VDOP 1.5 Vertical Dilution of Precision
Checksum *33
End of message termination
NOTE: Satellite used in solution.
Table 5-6 Mode 1
Value Description
M Manual—forced to operate in 2D or 3D mode
A 2DAutomatic—allowed to automatically switch 2D/3D
Table 5-7 Mode 2
Value Description
1 Fix Not Available
2 2D
3 3D
10