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RGM-3550LP User Manual
Table 3
GLL Data Format
Name Example
Units
Description
Message ID
$GPGLL
GLL protocol header
Latitude 3723.2475 ddmm.mmmm
N/S Indicator
N
N=north or S=south
Longitude 12158.3416 Dddmm.mmmm
E/W Indicator
W
E=east or W=west
UTC Position
161229.487
hhmmss.ss
Status
A
A=data valid or V=data not valid
Checksum *2C
＜
CR
＞＜
LF
＞
End of message termination
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 4-2
Mode 2
3
See Table 4-1
Satellite Used
07
Sv on Channel 1
Satellite Used
02
Sv on Channel 2
….
….
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
＜
CR
＞＜
LF
＞
End of message termination
Table 4-1 Mode 1
Value Description
1
Fix not available
2 2D
3 3D
