Processing the Logs
Log files are stored on the SD card as binary files and they're encoded for security reasons. However, you can extract the data and view it in a understandable text format (CSV format which can be later exported in XLS, Matlab, or anything else for post-processing and analysis).
You'll need to use the following Python script: ulog2csv.py
Python should be installed on your computer.
If you don't have Python, you can download it here https://www.python.org/downloads/, version 2.7.
To export the log, follow these simple steps:
  • Open command line
  • Go to the folder where " ulog2csv.py " script is located cd /path/to/script
  • Execute the command:
    python ulog2csv.py filename.ulg
    (filename.ulg is the path to the log file)
  • You'll see the folder will all log messages split in separate files
For instance, if you're interested in GNSS (GPS/GLONASS) data you would need GNSS_REPORT.csv file.
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