Hi Kurt, drop some pictures here if you’d like. The CSV files contain all data recorded. You can use that with offline tools, for charts, stats or other processing.
RTC is unix timestamp, here is a convertor than you can use: http://www.unixtimestamp.com but there are plenty other.
Altitude is in meters, yes and speed is in km/h. The conversion of CPM to Equivalent dose rate is done with a linear approximation. The factor is EQdr = CPM x 0.005940 . (Very similar to other products using the LND712, like the gamma scout).
Yes, the file names are dates, made that way to keep things organised.

Glad you’re happy with it, thank you for the nice feedback. Also should you have any other questions, feel free to post them here.

Thanks,
Radu