Orion NMEA User Manual
GPS Receiver Module
Micro Modular Technologies Pte. Ltd.
Page 6 of 25
No. 3, Ubi Avenue 3, #03-02 Crocodile House 408857 Singapore
Tel: 65-6745-8832 Fax: 65-6293-0661 Email: sales@micro-modular.com
www.micro-modular.com
3.4
GSA – GNSS DOP and Active Satellites
This sentence contains the mode of operation, type of fix, PRNs of the satellites used in the solution
as well as PDOP, HDOP and VDOP.
$GPGSA,A,3,15,22,18,21,03,14,09,19,16,26,,,1.5,1.0,1.2*3E
Name
Description
Type
Example
MsgID
GSA Header
$GPGSA
OpMode
A = Automatic
M = Manual (not used by Orion)
A
FixType
1 = No fix
2 = 2D fix
3 = 3D fix
3
SatID01
SV on channel 01
15
…
…
…
SatID12
SV on channel 12
<null>
PDOP
Position Dilution of Precision
1.5
HDOP
Horizontal Dilution of Precision
1.0
VDOP
Vertical Dilution of Precision
1.2
ChkSum
Checksum
*3E
EOL
NMEA end of line
<CR> <LF>
Table 5 – GSA Sentence Fields