gnss_accuracy_and_error_oer

NMEA parsing (Python script)

The extract_nmea_data.py script in the processing folder will parse NMEA data and split it into the following CSV folders:

• as_data ($GPGSA): containing DOP and identifiers of satellites used for position fix.
• ll_data ($GPGGA): contains the date, time, latitude and longitude.
• mv_data ($GPRMC): contains movement data such as speed, bearing.
• sv_data ($GPGSV/GLGSV): contains the satellite details (e.g., type, elev, azim, SNR).
• tg_data ($GPVTG): contains bearings and speeds. Some repetition from mv_data.

Instructions

Place your nmea data in the nmea_data folder and then execute the script as suits you:

python3 extract_nmea_data.py nmea_data/nmea_file.csv
python3 extract_nmea_data.py nmea_data/*
python3 extract_nmea_data.py nmea_data/f1.csv nmea_data/f2.csv

Note that the llid field in the generated files allows synchronizing data, such as date or location, between files.

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