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Hi. I need to process log files. I had been told before that .tlog files were based on QGroundControl format, but looking at one, it does not seem to contain valid data. That is, the first 8 bytes do not seem to be a valid timestamp, there is no 0x55, and no further explanation of the file format.

Can anyone describe the converted CSV format? I used the version of APM Mission Planner uploaded yesterday to convert our .tlog files to CSV, and have lines like this I want to parse:

3/17/2013 12:37:41 PM,FE,1E,13, 1, 1,18,mavlink_gps_raw_int_t,time_usec,306016000,lat,374117780,lon,-1219946540,alt,-11600,eph,105,epv,65535,vel,1,cog,19503,fix_type,3,satellites_visible,11,,Len,38

I can guess that each pair is "label,value", but what is the initial data, and what's in the empty field before "Len"?

Thanks,