RoyalTek REB-1722 Series, Руководство по эксплуатации, Страница: 17 / 24

RoyalTek Confidential
16
REB-1722 Operational Manual
Units M meters
Age of Diff. Corr. second Null fields when DGPS is
not used
Diff. Ref. Station
ID 0000
Checksum *18
＜
CR
＞＜
LF
＞
End of message
termination
Table 3 Position Fix Indicators
Value Description
0 Fix not available or invalid
1 GPS SPS Mode, fix valid
2 Differential GPS, SPS Mode, fix valid
3-5 Not Supported
6 Dead Reckoning Mode, fix valid
GSA-GNSS DOP and Active Satellites
Table 4 contains the values of the following example:
$GPGSA, A, 3, 07, 02, 26, 27, 09, 04, 15, , , , , , 1.8,1.0,1.5*33
Table 4 GSA Data Format
Name Example Units Description
Message ID $GPGSA GSA protocol header
Mode 1 A See Table 5
Mode 2 3 See Table 6
ID of Satellite
Used 07 Sv on Channel 1
ID of Satellite
Used 02 Sv on Channel 2
…. ….
ID of Satellite
Used 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