Launch Box User Guide
July 2022
P.17
Appendix
F
. GPS Logs
The GPS logs are recorded in text files. The GPS is recorded in NMEA message structure.
Example String:
$GNRMC,173939.00,A,4520.72561,N,06318.54342,W,3.246,327.24,170722,,,A*6A
Example $GNRMC 173939.00 A 4520.72561 N 06318.54342 W 3.246 327.24 170722
A
*6A
Field
1
2
3 4
5 6
7 8
9
10
11 12 13 14
GN
Global Navigation Satellite System (GNSS)
RMC
Recommended Minimum specific GPS data
123654.00
Fix taken at 12:36:54 UTC
A
Status A=active or V=Void.
4520.72561
Latitude (DDmm.mm)
N
Latitude direction: (N = North, S = South)
06318.54342
Longitude (DDmm.mm)
W
Longitude direction: (E = East, W = West)
3.246
Speed over ground, knots
327.24
Track made good; degrees True
170722
Date
–
17
th
of July 2022 dd/mm/yy
(empty field)
Magnetic variation, degrees (field not provided in this setup)
(empty field)
Magnetic variation direction (Field not provided in this setup)
A
Positioning System Mode Indicator:
A=Autonomous, D=Differential, E=Estimated, F=Float RTK, M=Manual input,
N=No fix, P=Precise, R=Real time kinematic, S=Simulator
*6A
Checksum data, always begins with *
