Experts from the satellite firm modelled the most likely flight path using the hourly pings and assuming a speed and heading consistent with the plane being flown by autopilot.

“We can identify a path that matches exactly with all those frequency measurements and with the timing measurements and lands on the final arc at a particular location, which then gives us a sort of a hotspot area on the final arc where we believe the most likely area is,” explained Ashton.

After coming under criticism from relatives over the futile search, Malaysia’s civil aviation authority and Inmarsat last month decided to release the raw data.

However, its complexity has led to few independent conclusions being drawn about the likely crash site.

Malaysian Selamat Umar, whose son Mohamad Khairul Amri was on the ill-fated jetliner, questioned the motives behind the data release.

“I am not convinced at all by the data,” he said. Why are they releasing it now? Before when we asked for it, they did not want to release it. What can we do with it now?

“I think they could have made some changes to the data,” Selamat, 60, added.