Since Flight Review has been down now for over 24 hours, I’ve decided it was time to get around to making a Mission Planner style log field plotter. I’ll probably add it to my collection of log file analysis scripts - available on GitHub.
It’s interesting what you learn when “under the hood” - PX4 uses quaternions instead of euler angles to record desired and actual position on pitch, roll and yaw.
Why not use plotjuggler? 
As previously mentioned, plotjuggler is a powerful tool.
Another option is to run PX4/flight_review on your machine.
But anyhow - good for you for the work, share the code if you will.
That’s a good question.
After about 5 years using ArduPilot, I decided to take a look at PX4. The PX4 Flight Review website is helpful - but has no access to raw data. In fact, as I became more familiar with exactly what’s stored in PX4 log files, I realized that much of the data reported on PX4 Flight Review was “synthetized.” For example, it’s vibration metrics plot does not break each of the X, Y, and Z axis.
To learn more I began writing some of my own Python scripts to examine certain log file elements. I’ve put them up on github, and have a server that allows using most of them on line. You can find access to all that on my website. Flight-Tools | Copter Cam Tech
Through all this I never had time to take a look at Plot Juggler - but I knew it was out there.
When the PX4 Flight Review website was down for a few days, I decided it was time to write my own log file plotter program - that works with PX4’s .ulg file is a similar way that Mission Planner and MavExplorer work with ArduPilot .bin files.
I’ve made a Windows .exe version. If you’d like to try it: https://drive.google.com/file/d/1uwNJ-xTZ-e4Kff4LcCM78xUlwa3KMa8Z/view?usp=sharing
Thank you.
I’ll be adding the code for this to my GitHub soon. I’m still considering some new features, and a bit of polish.
In the meantime, you can use the Windows .exe version: https://drive.google.com/file/d/1uwNJ-xTZ-e4Kff4LcCM78xUlwa3KMa8Z/view?usp=sharing
I’d very much appreciate any suggestions or comments.
