Telit Wireless Solutions GE863 Manuel D’Utilisation

 
 
 
 

 
 

GE863-GPS Software User Guide 

 1vv0300724  Rev. 2 - 24/01/07    

  

 

5.4.3 GSA - GNSS DOP and Active Satellites 

 

This sentence reports the GPS receiver’s operating mode, satellites used in the navigation solution 
reported by the GGA sentence and DOP values. 
 
Table D contains the values for the following example: 
 
$GPGSA,A,3,07,02,26,27,09,04,15, , , , , ,1.8,1.0,1.5*33 
 

Name 

Example  Units 

Description 

Message ID 

$GPGSA   

GSA protocol header 

Mode 1 

A 

 

See Table E 

Mode 2 

3 

 

See Table F 

Satellite 
Used1. 
Satellite used 
in solution.1 

07 

 

Sv on Channel 1 

Satellite 
Used1 

02 

 

Sv on Channel 2 

.... 

 

 

 

Satellite 
Used1 

 

 

 

PDOP 

1.8 

 

 

HDOP  

1.0 

 

 

VDOP 

1.5 

 

 

Checksum 

*33 

 

 

<CR> <LF> 

 

 

End of message termination 

 
 

Table E: Mode 1 

Value 

Description 

M 

Manual—forced to operate in 2D or 3D 
mode 

A 

2D Automatic—allowed to automatically 
switch 2D/3D  

 
 

Table F: Mode 2 

Value 

Description 

1 

Fix not available  

2 

2D (<4 SVs used) 

3 

3D (>3 SVs used) 

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