Originally Posted by airtren
naming of that curve "SW threshold" would make the graph clearer/self explanatory, while adding a "SW" curve (non-contiguous curve) would be the curve representing on the time scale the intervals when the Stall Warning was (should have been) active.
To start with just a reminder of BOAC's justified concern that these curves should not be mistaken for real DFDR data. What you are asking is problematic because the curves assume still air, and one should be aware that turbulence would superimpose "grass"-like fluctuations on most parameters. IMO that is the reason that the two brief activations of S/W after 2:10:05 are not shown as threshold exceedances on mm43's graph. May I suggest that you just make a note that the AoA was 'invalid' between 2:11:40 plus 'a few seconds' and 2:12:17?
... and showing the discontinuity in the SWT (stall warning threshold) curve, due to NCD ...
The systems consider the signals coming from the AoA vanes invalid, there is no discontinuity in the SWT.
You pose more valid questions, but I regret not being in a position to answer them.