LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
Page
10/23
© 2018 LOCOSYS Technology Inc.
Table 8.1-3 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
GLL--- Geographic Position – Latitude/Longitude
Table 8.1-4 contains the values for the following example:
$GNGLL,2503.7150,N,12138.7463,E,081419.000,A,A*4A
Table 8.1-4 GLL Data Format
Name Example Units Description
Message ID $GNGLL GLL protocol header, GN means GPS+GLONASS,
GP means GPS only
GL means GLONASS only
Latitude
2503.7150
ddmm.mmmm
N/S indicator N N=north or S=south
Longitude
12138.7463
dddmm.mmmm
E/W indicator E E=east or W=west
UTC Time
081419.000
hhmmss.sss
Status A A=data valid or V=data not valid
Mode A A=autonomous, D=DGPS, E=DR, N=Data not valid,
R=Coarse Position, S=Simulator
Checksum *4A
<CR> <LF> End of message termination
GSA---GNSS DOP and Active Satellites
Table 8.1-5 contains the values for the following example:
$GPGSA,A,3,23,21,16,19,09,27,31,,,,,,1.10,0.78,0.78*01
$GLGSA,A,3,88,87,65,84,71,,,,,,,,1.10,0.78,0.78*18
Table 8.1-5 GSA Data Format
Name
Example
Units
Description
Message ID
$GPGSA
GSA protocol header, GP means GPS & GL means
GLONASS
Mode 1 A
See Table 8.1-6
Mode 2 3
See Table 8.1-7
