(3.996 s 110.232 e to 4.083 s 110.335e = 54,897ft)
(23:10:57 to 23:12:37 = 100 seconds)
54897 / 100 * 60 * 60/ 6000 = 329 K
I would suggest, from a quick look last valid position was 23:12:01 - it seems to slow then stop after that? As does the data rate (from every 3s to a big gap). Quick calc by me makes it 494K?
Are the 3rd/4th columns from the right TAS & Hdg? Track? 2nd V/S? Last column?