Trimble Outdoors aggps 332 Manuel D’Utilisation

AgGPS 332 GPS Receiver User Guide     87

NMEA-0183 Messages     C

The GSA message identifies the GPS position fix mode, the SVs used for 
navigation, and the Dilution of Precision values. 

The GSA message structure is:

$GPGSA,A,3,19,28,14,18,27,22,31,29,,,,,
1.7,1.0,1.3*35

Table C.7 describes these fields.

1

Mode

M:

Manual, forced to operate in 2D or 3D

A:

Automatic, 3D/2D

2

Mode

1:

Fix not available

2:

2D

3:

3D

3–14

IDs of SVs used in position fix (null for unused fields)

15

PDOP

16

HDOP

17

VDOP