and Engineering GPS Receiver User Manual

GSA – GNSS DOP and Active Satellites

Receiver operating mode, the values of DOPs, and PRN numbers for satellites used in

the GGA position solution.

$GPGSA,gsa1,gsa2,(gsa3*12),gsa4,gsa5,gsa6*hh<CR><LF>

Parameters Descriptions Notes

gsa1

gsa2 Mode for position fix 1 – fix not available;

2 – 2D;

3 – 3D;

gsa3*12 PRN numbers for satellites used in the

position solution. There will be 12

available fields for PRN numbers. I

number of satellites is less than 12, the

remaining fields will be left as empty

fields. If number of satellites is greater

than 12, only the values of the first 12

satellites will be output.

gsa4 PDOP 0 ~ 99.9

gsa5 HDOP 0 ~ 99.9

gsa6 VDOP 0 ~ 99.9

hh Checksum hex number (2 – character)

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