Tuesday, June 17, 2014
MH370: Lokasi Sebenar Sudah Dikenal Pasti Oleh Inmarsat?
Malaysian MH370: Inmarsat confident on crash 'hotspot'
Inmarsat's communications with the aircraft are seen as the best clues to the whereabouts of Flight MH370.
The hunt for the lost jet is currently taking a short break while ships map the Indian Ocean floor.
When the search resumes, the Inmarsat "hotspot" will be a key focus.
But so too will a number of areas being fed into the investigation by other groups.
Australian authorities are expected to announce where these are shortly.
The BBC's Horizon TV programme has been given significant access to the telecommunications experts at Inmarsat.
It was the
brief, hourly electronic connections between the jet and one of
company's spacecraft that are currently driving the search.
Inmarsat's
scientists could tell from the timings and frequencies of the connection
signals that the plane had to have come down in the southern Indian
Ocean.
An Australian naval vessel was sent to investigate the region west of Perth, and followed up leads as they emerged.
But as Horizon
reports, the Ocean Shield ship never got to the Inmarsat hotspot because
it picked up sonar detections some distance away that it thought were
coming from the jet's submerged flight recorders.
The priority
was to investigate these "pings", and two months were spent searching
850 sq km of sea bed. Ultimately, it turned out to be a dead end.
"It was by no
means an unrealistic location but it was further to the north east than
our area of highest probability," Chris Ashton at Inmarsat tells
Horizon.
The company's
experts used their data to plot a series of arcs across the Indian Ocean
where its systems made contact with the jet.
By modelling a
flight with a constant speed and a constant heading consistent with the
plane being flown by autopilot - the team found one flight path that
lined up with all its data.
"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," said Mr
Ashton.
The Australian
authorities leading the hunt have now recognised the need to make a
high-resolution bathymetric (depth) survey of the wider search zone -
some 60,000 sq km in area.
This is likely
to take several months, but once they know precisely the shape of the
sea bed and the height of the water column, they can then better choose
the most appropriate vehicles to continue the underwater sweep.
MH370 was lost on 8 March en route from Kuala Lumpur to Beijing. A total of 239 passengers and crew were on board.
The Ocean Shield investigated what were thought to be pings from the submerged flight recorders
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