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
2mode MA A = Automatic 2D/3D (not used by GPSCard) M = Manual, forced to
operate in 2D or 3D M M
3mode 123 Mo de: 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]