@SFgeek
I plot the center of the circle to be about: 6°16'16.02"N 97°49'29.62"E.
BTW the Malaysian radar antenna that tracked MH370 during this part of the flight is the Polu Pinang Radar at 5°25'28.70"N 100°15'2.89", it is on a peak of at least 800 meters height.