USGlobalsat EB-5662RE - Manual (Page 13)

EB-5662RE
High Performance GPS Engine Board
- 13 -
GSA - GNSS DOP and Active Satellites
Table B-5 contains the values for the following example:
$GPGSA,A,3,07,02,26,27,09,04,15,,,,,,1.8,1.0,1.5*33
Table B-5 GSA Data Format
Name Example Units Description
Message ID $GPGSA GSA protocol header
Mode 1 A See Table B-6
Mode 2 3 See Table B-7
Satellite Used
1
07 Sv on Channel 1
Satellite Used
1
02 Sv on Channel 2
…..
Satellite Used
1
Sv on Channel 12
PDOP
2
1.8 Position dilution of Precision
HDOP
2
1.0 Horizontal dilution of Precision
VDOP
2
1.5 Vertical dilution of Precision
Checksum *33
<CR><LF> End of message termination
1. Satellite used in solution.
2. Maximum DOP value reported is 50. When 50 is reported, the actual DOP may be much larger.
Table B-6 Mode1
Value Description
M Manual-forced to operate in 2D or 3D mode
A 2Dautomatic-allowed to automatically switch 2D/3D
Table B-7 Mode 2
Value Description
1 Fix Not Available
2 2D (<4 SVs used)
3 3D (>3 SVs used)