I think the post opening this thread needs some clarification.
The MH370 saga was discussed a lot yet somehow the new published radar track and the mysterious "Sharp Corner" in it got little attention.
The ATSB report contains a Fig. 2 titled "MH370 flight path derived from primary and secondary radar data":
http://www.atsb.gov.au/media/5243942..._18aug2014.pdf
The source of Fig. 2 is the JIT, the official Joint Investigation Team located in Malaysia and comprising of experts from Malaysia, China, US, UK and France.
Fig. 2 is high resolution and you should examine it under at least 400% magnification. A very interesting feature is the very sharp 110 degrees corner above the word "Last" in "Last secondary radar data 1722".
Simple calculations show that such a sharp corner can't be a level flight turn even with bank angle of 67 degrees and higher. It could indicate however a kind of Split-S, an unusual aerobatic maneuver for a Boeing 777. There are other more esoteric explanations possible, e.g. ID duplication.
The thread poster is apparently asking for an ATC technical insight about this sharp corner hoping it'll throw some light on the MH370 mystery.
Some possible notes:
* some of the radar data processing is probably done in real time so concentrating on the extraction of data from recordings may miss it
* under high magnification (e.g. 1600%) it seems the data points density is higher than an ordinary SSR so there may be ADS-B data included too
* considering the ranges involved it seems the relevant data could come from Vietnamese SSR and ADS-B but there may be Malaysian data too
* It's possible other data e.g. ADS-C, ELINT was included too