GNGSA Message

Message Type:

Data

Description:

DOP and active satellite information

Only satellites used in the position computation are present in this message. Null fields are present when data is unavailable due to the number of satellites tracked.

Command Format to Request Message:


$JASC,GNGSA,r[,OTHER]<CR><LF>

where:

·        'r' = message rate in Hz of 1 or 0 (0 turns off the message)

·        ',OTHER' = optional field, enacts a change on the current port when you send the command without it (and without the brackets) and enacts a change on the other port when you send the command with it (without the brackets)

Message Format:


$GNGSA,A,B,CC ... OO,P.P,Q.Q,R.R,GSID*CC<CR><LF>

where:

 

Message Component

Description

 

A

Satellite acquisition mode (M = manually forced to 2D or 3D, A = automatic swap between 2D and 3D)

B

Position mode (1 = fix not available, 2 = 2D fix, 3 = 3D fix)

CC to OO

Satellites used in the position solution, a null field occurs if a channel is unused

P.P

Position Dilution of Precision (PDOP) = 1.0 to 9.9

Q.Q

Horizontal Dilution of Precision (HDOP) 1.0 to 9.9

R.R

Vertical Dilution of Precision (VDOP) = 1.0 to 9.9

GSID

GNSS system ID, value is 1 (GPS), 2 (GLONASS), 3 (GALILEO), 5 (BEIDOU)

*CC

Checksum

<CR>

Carriage return

<LF>

Line feed

 


Additional Information:

This message provides information specific to the satellite system(s) identified by the first two characters of the message.

GNGSA - GNSS information (all constellations)

GPGSA - GPS information GLGSA - GLONASS information


Related Commands:

JASC,GP, JASC,GN, JASC,GL

 

Topic Last Updated: v1.07 / February 16, 2017