I looked at the .DAT some this morning.
@McVenturesRC had uploaded it to the flylog.info site and I retrieved it from there. I used a new tool, called DatConverter, that I had made available on the website yesterday. It's an offline version of the website converter. The .DAT has more data than can be plotted by Excel. I used DatConverter to produce 2 .csv files; one for the preflight where a compass calibration was done, and another for the flight itself. This post addresses the flight. The preflight was actually kinda interesting; I'll address that in another post.
The battery was on and providing power for about 180 seconds. It was at roughly 133 seconds when the P3 was launched. When the recording stopped the P3 was still in the air. I'll speculate that the battery disconnected, causing the recording to stop. However, there were no corruptions or partial records that often happens when the battery is removed while still providing power. In fact, this .DAT didn't have any partial records or data corruptions.
The .DAT shows the P3 with a heading of 198 degrees for the entire flight. Is this right? There is also a problem with the way the altitude is presented. I'm looking into that.
You should definitely get DJI to look at this .DAT file. I'd appreciate knowing anything they tell you.
I've included some plots that I made with Excel. First are the X and Y accelerometer data
View attachment 35663
The horizontal axis is labelled with the clock tick#. The clock runs at 600 HZ so this plot, starting at tick# 80000, coincides with 133 seconds. The event at 81000 is the take off and the events at around 105000 are the maneuvers at the end of the flight.
The barometer is shown here
View attachment 35667
Note, that the recording terminates with the P3 still at altitude indicating a loss of power in flight.
The battery data is shown here
View attachment 35666