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D Logs summary
146 MiLLennium Command Descriptions Manual
GPGSA GPS DOP and Active Satellites
GPS receiver operating mode, satellites used for navigation and DOP values.
Structure:
Example:
$GPGSA,M,3,18,03,13,25,16,24,12,20,,,,,1.5,0.9,1.2*3F[CR][LF]
$GPGSA mode MA mode 123
prn
prn
prn prn prn prn prn prn prn prn prn prn
pdop hdop vdop *xx [CR][LF]
Field Structure Field Description Symbol Example
1 $GPGSA Log header $GPGSA
2 mode MA A = Automatic 2D/3D (not used by GPSCard) M = Manual, forced to
operate in 2D or 3D
M M
3 mode 123 Mode: 1 = Fix not available; 2 = 2D; 3 = 3D x 3
4 - 15 prn PRN numbers of satellites used in solution (null for unused fields), total
of 12 fields
xx,xx,..... 18,03,13,25,16,
24,12,20,,,,
16 pdop Position dilution of precision x.x 1.5
17 hdop Horizontal position and time dilution of precision x.x 0.9
18 vdop Vertical dilution of precision x.x 1.2
19 *xx Checksum *hh *3F
20 [CR][LF] Sentence terminator [CR][LF]