User Manual

By Default the NMEA USB port provides the following sentences:
GGA, GLL, GSA, GSV, RMC, VTG.
This sentence provides time, position, and fixes related data for a GPS Receiver. Table A contains the
values for the following example:
$GPGGA,161229.487,3723.2475,N,12158.3416,W,1,07,1.0,9.0,M, , , ,0000*18
Table A
Name
Example
Units
Description
Message ID
$GPGGA
GGA protocol header
UTC Time
161229.487
hhmmss.sss
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
Position Fix
Indicator
1
See Table B
Satellites Used
07
Range 0 to 12
HDOP
1.0
Horizontal Dilution of Precision
MSL Altitude
9.0
meters
Units
M
meters
Geoid
Separation
meters
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 B
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
This sentence provides latitude and longitude of vessel position, time of position fix and status. Table C
contains the values for the following example:
$GPGLL,3723.2475,N,12158.3416,W,161229.487,A,A*41