Were can I find the documentation on the binary file format that can be downloaded from the sub in QGroundControl.
I would like to access the raw data from each mission in particular the 9-axis accelerometer data to see if I can get a reasonable INS solution from it.
Unfortunately, I don’t think the format is documented anywhere. You can use mavlogdump.py to export the data to csv or m files and MAVExplorer.py to plot the data. These programs are included in a Mavproxy installation.