Holux GM-270 User Manual page 7

Units
Age of Diff. Corr.
Diff. Ref. Station ID
Checksum
<CR> <LF>
Value Description
0 0 Fix not available or invalid
1 GPS SPS Mode, fix valid
2 Differential GPS, SPS Mode, fix valid
3 GPS PPS Mode, fix valid
2.2.1.2 GNSS DOP and Active Satellites (GSA)
Table 2-4 contains the values for the following example:
$GPGSA,A,3,07,02,26,27,09,04,15, , , , , ,1.8,1.0,1.5*33
Name
Message ID
Mode 1
Mode 2
Satellite Used
Satellite Used
......
Satellite Used
PDOP
HDOP
VDOP
Checksum
<CR> <LF>
1. Satellite used in solution.
Value
M
A
Value
1
2
3
2.2.1.3 GNSS Satellites in View (GSV)
Table 2-7 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
M
0000
*18
Table 2-3 Position Fix Indicator
Table 2-4 GSA Data Format
Example
$GPGSA
A
3
07
02
1.8
1.0
1.5
*33
Description
Manual—forced to operate in 2D or 3D mode
2DAutomatic—allowed to automatically switch 2D/3D
Description
Fix Not Available
2D
3D
Table 2-7 GSV Data Format
Meters
second Null fields when DGPS is not used
End of message termination
Units Description
GSA protocol header
See Table 2-5
See Table 2-6
Sv on Channel 1
Sv on Channel 2
....
Sv on Channel 12
Position Dilution of Precision
Horizontal Dilution of Precision
Vertical Dilution of Precision
End of message termination
Table 2-5 Mode 1
Table 2-6 Mode 2
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