USGlobalsat EM-406a User Manual
Page 7
EM-406a
Specifications are subject to be changed without notice.
Page 7 of 13
Version 1.4.1
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
Mode1
A
See Table B-6
Mode2
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
1.8
Position dilution of Precision
HDOP
1.0
Horizontal dilution of Precision
VDOP
1.5
Vertical dilution of Precision
Checksum
*33
End of message termination
1. Satellite used in solution.
Table B-6 Mode1
Value
Description
M
Manual-forced to operate in 2D or 3D mode
A
2D automatic-allowed to automatically switch 2D/3D
Table B-7 Mode 2
Value
Description
1
Fix
Not
Available
2
2D
3
3D
GSV-GNSS Satellites in View
Table B-8 contains the values for the following example:
$GPGSV,2,1,07,07,79,048,42,02,51,062,43,26,36,256,42,27,27,138,42*71
$GPGSV,2,2,07,09,23,313,42,04,19,159,41,15,12,041,42*41
Table B-8 GSV Data Format
Name
Example Units
Description
Message ID
$GPGSV
GSV protocol header