Kill me for starting with

Bloomberg numbers supposedly backed up by:

Expert 1: "Scott Dunham, a former National Transportation Safety Board investigator, who combined the distance the plane traveled horizontally and vertically to arrive at a speed estimate." {600mph}

Expert 2: "John Hansman, a Massachusetts Institute of Technology aeronautics and astronautics professor, estimated the plane was flying at 540mph in the final moments..."

Expert 3: Jasenka Rakas, a lecturer in engineering and aviation at the University of California at Berkeley "...the speed could have been between 586 and 633 mph."

~~added Bloomberg hype?~~ "At the end, it fell 1,025ft in 1.6 seconds."

I thought the ~600mph was vector sum of vertical and horizontal velocities.

Flightradar24 data looking at timestamps,

~~ it was at 28,000ft and took minutes to drop, so -33,000ft/min seems wrong too.~~ 2018-10-28 23:31:56Z.030 last two samples do say it fell 1,025ft in 1.6 seconds.

edit: confused flight JT610 with JT43.