@ peekay4: I was curious about how accurate the GPS derived VS would be, so I made an experiment.
In this .cvs you'll find a few new columns:
- c_alt contains the change in altitude from vertical speed over time
- n_alt contains the new altitude calculated from previous n_alt + c_alt
- d_alt contains difference between (baro) altitude and n_alt
- vs_alt contains altitude calculated from last trusted altitude and GPS VS after upset
The difference before upset is never more than a few tens of feet, and at the moment things start to happen (t=793.671) the difference is 19.5 feet. So for as long as the GPS precision remains good (which is not all the way to the end), I think the GPS VS and consequently calculated altitude is fairly trustworthy - at least compared to the old data.
My apologies to the folks who are not of the FR24 persuasion.
