Originally Posted by
peekay4
Well considering a fully-loaded 747 at 164 kts, to go from a -320 fpm descent to a +30,000 (!) fpm climb in 1.1 seconds isn't credible and might possibly violate a few laws of physics. So I think excluding the suspect data may be reasonable in this case.
Your healthy scepticism is commendable, but I fear you are applying it to the wrong elements of the data.
Hint: Look back at the last 50 seconds of flight as plotted in the Additional Decoded ADS-B Data. Count how many points there are during those 50 seconds where the aircraft appears to be flying backwards (i.e. east). Then think about what in the dataset might be causing that to (apparently) happen.