I have received NMEA data stored in an excel file. Sample data:
DOS_TXT GPS_WS NMEA D 1530000114 379550,0702 $GPGGA,092550.000,6311.7019,N,01429.1063,E,1,09,0.88,357.2,M,33.6,M,,*6B,5567,5567736, TRM_NMEA 1530000115 379550,0809 $GPGSA,A,3,08,21,11,10,13,32,15,18,27,,,,1.18,0.88,0.77*0B,5581,5582816, TRM_NMEA 1530000116 379550,0935 $GPRMC,092550.000,A,6311.7019,N,01429.1063,E,0.01,215.98,271016,,,A*60,5593,5593216, TRM_NMEA 1530000117 379550,0999 $GPVTG,215.98,T,,M,0.01,N,0.02,K,A*39,5605,5606104, TRM_NMEA
The GPSBabel code looks like that in the GUI:
gpsbabel -w -t -i nmea -f /Users/.../GPS_DATA_20161027.xlsx -o gpx -F /Users/.../testflight.gpx
I just get an empty file and don't know what's the issue.