User`s manual

USB Dongle Series Model:UD-731N

UniTraQ International Corp. RoHS compliance.

2011,01, Version 1.1

10.3 GSA - GPS DOP AND ACTIVE SATELLITES

GPS receiver operating mode, satellites used in the navigation solution reported by the GGA

or GNS sentence and DOP values.

Structure:

$GPGSA,A,x,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,x.x,x.x,x.x*hh<CR><LF>

1 2 3 3 3 3 3 3 3 3 3 3 3 3 4 5 6 7

Example:

$GPGSA,A,3,01,20,19,13,,,,,,,,,40.4,24.4,32.2*0A<CR><LF>

Field Name Example Description

1 Mode A Mode

‘M’ = Manual, forced to operate in 2D or 3D mode ‘A’ =

Automatic, allowed to automatically switch 2D/3D

2 Mode 3 Fix type

1 = Fix not available

2 = 2D

3 = 3D

3 Satellite used 1~12

01,20,19,13,,,,,

,,,,

Satellite ID number, 01 to 32, of satellite used in solution,

up to 12 transmitted

4 PDOP 40.4 Position dilution of precision (00.0 to 99.9)

5 HDOP 24.4 Horizontal dilution of precision (00.0 to 99.9)

6 VDOP 32.2 Vertical dilution of precision (00.0 to 99.9)

7 Checksum 0A