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A     NMEA-0183 Output

78     SPSx80 Smart GPS Antenna User Guide

An example of the GSA message string is shown below. Table A.4 describes the 
message fields.

$GPGSA,<1>,<2>,<3>,<3>,,,,,<3>,<3>,<3>,<4>,<5>,<6>*<7><CR><LF> 

Table A.4

GSA message fields

0

message ID $GPGSA

1

Mode 1, M = manual, A = automatic

2

Mode 2, Fix type, 1 = not available, 2 = 2D, 3 = 3D

3

PRN number, 01 through 32, of satellite used in solution, up to 12 transmitted

4

PDOP-Position dilution of precision, 0.5 through 99.9

5

HDOP-Horizontal dilution of precision, 0.5 through 99.9

6

VDOP-Vertical dilution of precision, 0.5 through 99.9

7

The checksum data, always begins with *