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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
Field
1
2
Global Navigation Satellite System (GNSS)
GN
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
(empty field)
Magnetic variation, degrees (field not provided in this setup)
(empty field)
Magnetic variation direction (Field not provided in this setup)
Positioning System Mode Indicator:
A
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 *
A
4520.72561
N
06318.54342
3
4
5
6
of July 2022 dd/mm/yy
th
Launch Box User Guide
W
3.246
327.24
170722
7
8
9
10
July 2022
A
*6A
11
12
13
14
P.17
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