Malaysian Airlines MH370 contact lost
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There's still symmetry about the line connecting the starting point and the "epicenter" of the satellite (0N 64.5E).
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Hamster3null
........nice info on the satellite from MM43 and the others . .........can I just add that the system is not nearly as symmetrical as you might think..the earth is not a sphere and has an equatorial bulge due to spin .....the earth and moon act as a binary system in orbit around each other , so the actual centre of gravity of the "system" is some 4000km away from the centre of the earth in the direction of the moon , it causes a slight bulge on the surface of the earth , and the tides too........so any item in orbit around the earth has a bit of a balancing act to perform.....
Anybody know how good (re sensitivity and attention-getting) the carbon monoxide detector/s on this a/c are?
Done a thread and forum search. The word "monoxide" doesn't appear in this thread, according to the search result.
Done a thread and forum search. The word "monoxide" doesn't appear in this thread, according to the search result.
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As with the SilkAir incident, I'm convinced that this will be found to be pilot murder/suicide.
ACARS, Transponder turned off and I'm sure the DFDR and CVR will be found turned off in due course.
ACARS, Transponder turned off and I'm sure the DFDR and CVR will be found turned off in due course.
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Assuming the FDR hadn't been disabled at he same time as the comms.
Is there an sfdr cb?
Telegraph reporting flight investigators considering 'suicide mission' and jet was deliberately crashed.
If I was the co, there is no fekking way that door would be standing after 7 hours, even if I had to use a fire axe to chop my way through the forward bulkhead.
Is there an sfdr cb?
Telegraph reporting flight investigators considering 'suicide mission' and jet was deliberately crashed.
If I was the co, there is no fekking way that door would be standing after 7 hours, even if I had to use a fire axe to chop my way through the forward bulkhead.
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May or may not be related
Several years back in another thread, there was a reference to an optional FMS feature addressing the emergency descent case. IIRC it was autonomous - rapid decompression would cause a 90 degree turn and max rate descent.
I've not been successful in tracking this down via PPRUNE search. Any ideas?
I've not been successful in tracking this down via PPRUNE search. Any ideas?
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" Telegraph reporting flight investigators considering 'suicide mission' and jet was deliberately crashed. "
Media speculation, trying to hype a story.
EVERYTHING will be on the table as to cause.
"Media speculation, trying to hype a story.
EVERYTHING will be on the table as to cause.
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Ok, like everyone else I feel for the families of those who have lost their lives. But I do have to say something about the attitude of the relatives, if the reports of the behaviour is true. No matter what happened on that airplane, the behaviour of the Chinese relatives and their disrespect to the Malaysian authorities is disturbing. I am willing to wager that they would not have acted this way towards their own government if it had been a Chinese aircraft. The Malaysian government may have made some mistakes in the presentation of information, but I do feel that they were trying to do they best in very difficult circumstances. I have been very impressed by the Defence Minister and Acting Minister of Transport and I have never previously been one to praise members of that particular government.
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I was one of those who questioned the Inmarsat ping results. The constant 40deg angle running near KL seemed questionable.
Now that the techniques have been validated against multiple aircraft, my hypothesis (terminal tracked not aboard aircraft) is clearly disproved.
Full marks to those who crunched the data. Your work has helped bring closure to this tragic matter.
Now that the techniques have been validated against multiple aircraft, my hypothesis (terminal tracked not aboard aircraft) is clearly disproved.
Full marks to those who crunched the data. Your work has helped bring closure to this tragic matter.
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Source: Flight 370's altitude dropped after sharp turn Kuala Lumpur, Malaysia (CNN) -- As a growing number of airplanes scoured the southern Indian Ocean in the search for Malaysia Airlines Flight 370, authorities released new details that paint a different picture of what may have happened in the plane's cockpit.
Military radar tracking shows that the aircraft changed altitude after making a sharp turn over the South China Sea as it headed toward the Strait of Malacca, a source close to the investigation into the missing flight told CNN. The plane flew as low as 12,000 feet at some point before it disappeared from radar, according to the source.
The sharp turn seemed to be intentional, the source said, because executing it would have taken the Boeing 777 two minutes -- a time period during which the pilot or co-pilot could have sent an emergency signal if there had been a fire or other emergency onboard.
Authorities say the plane didn't send any emergency signals, though some analysts say it's still unclear whether the pilots tried but weren't able to communicate because of a catastrophic failure.
Military radar tracking shows that the aircraft changed altitude after making a sharp turn over the South China Sea as it headed toward the Strait of Malacca, a source close to the investigation into the missing flight told CNN. The plane flew as low as 12,000 feet at some point before it disappeared from radar, according to the source.
The sharp turn seemed to be intentional, the source said, because executing it would have taken the Boeing 777 two minutes -- a time period during which the pilot or co-pilot could have sent an emergency signal if there had been a fire or other emergency onboard.
Authorities say the plane didn't send any emergency signals, though some analysts say it's still unclear whether the pilots tried but weren't able to communicate because of a catastrophic failure.
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Could someone just run the following bit of physics past them to see if I have got the important point about the Doppler shift right?
If the satellite was absolutely fixed then the Doppler shift would be the same irrespective of whether the plane was heading north or south BUT the sun and moon cause a slight - but predictable - wobble in the orbit of the satellite and since that wobble is also N/S that will add a very small but measurable extra value in the existing Doppler shift. If the satellite was heading south at the same time as the plane then the Doppler effect would be squeezed by a tiny bit and the wavelength decreased - ie very slightly blue-shifted. If the satellite was moving north whilst the plane was heading south then the radio wavelength would be stretched - very slightly red shifted.
Have I got that correct ?
If the satellite was absolutely fixed then the Doppler shift would be the same irrespective of whether the plane was heading north or south BUT the sun and moon cause a slight - but predictable - wobble in the orbit of the satellite and since that wobble is also N/S that will add a very small but measurable extra value in the existing Doppler shift. If the satellite was heading south at the same time as the plane then the Doppler effect would be squeezed by a tiny bit and the wavelength decreased - ie very slightly blue-shifted. If the satellite was moving north whilst the plane was heading south then the radio wavelength would be stretched - very slightly red shifted.
Have I got that correct ?
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Confirmation of pax and crew numbers -
On behalf of all of us at Malaysia Airlines and all Malaysians, our prayers go out to all the loved ones of the 226 passengers and of our 13 friends and colleagues at this enormously painful time.
MH370 Flight Incident | Malaysia Airlines
Passenger manifest -
http://www.malaysiaairlines.com/cont...ationality.pdf
On behalf of all of us at Malaysia Airlines and all Malaysians, our prayers go out to all the loved ones of the 226 passengers and of our 13 friends and colleagues at this enormously painful time.
MH370 Flight Incident | Malaysia Airlines
Passenger manifest -
http://www.malaysiaairlines.com/cont...ationality.pdf
Last edited by LegallyBlonde; 24th Mar 2014 at 21:43. Reason: ETA
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If the satellite was heading south at the same time as the plane then the Doppler effect would be squeezed by a tiny bit and the wavelength decreased - ie very slightly blue-shifted. If the satellite was moving north then the radio wavelength would be stretched - very slightly red shifted.
Have I got that correct ?
Have I got that correct ?
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Doppler was mentioned 10 days ago on here, was discounted as a location technique, together with the South Indian Ocean location they have probably found the jet in as tin foil hat conspiracist theory.
It wa postulated that the jet would be found either close in or at max range.
It wa postulated that the jet would be found either close in or at max range.
I don't own this space under my name. I should have leased it while I still could
We have once been alerted to an emergency beacon on 243MHz. It turned out to be one of our own so that signal had certainly escaped the cage.
Ill Judged Comments.
Currently, we still know almost nothing FACTUAL about this incident. There has been some outstanding comment and contribution in this thread. There are a lot of theories, but also, a lot of hot air from many who know nothing and some who should know better. There have been numerous idiotic comments in this thread blaming the crew, directly or indirectly. Since most of the so-called 'facts' implicating the crew seem to have faded-away, along with much else, it is simply unacceptable to post as though this was a done-deal. It ain't, - not by a long way. It's just one of a whole bunch of theories as yet.
This has been an unprecedented incident, and the causes, effects and remedies will gain no clarity whatsoever by unjustly and prematurely implicating the crew. Please desist, it's embarrassing
This has been an unprecedented incident, and the causes, effects and remedies will gain no clarity whatsoever by unjustly and prematurely implicating the crew. Please desist, it's embarrassing
If this was a case of unlawful interference, someone obviously wanted this aircraft to disappear and/or ensure that there would be no survivors. Perhaps it would be worth checking who on board had taken out high or unusual life insurance.
Unixman:
Let's try an example: Assume that the satellite is directly above the equator, also that the a/c is north of the equator and flying south.
As the a/c approaches the equator, doppler effect will cause an increase in measured frequency of the return signal in relation to the transmitted as the a/c effectively becomes closer to the satellite. This drops to zero offset as the a/c passes under the equator. Past the equator, the frequency will decrease as the effective distance from the satellite increases.
You can only get a 1d point fix from one satellite, but a 2d fix may be possible with two, depending on available data...
Let's try an example: Assume that the satellite is directly above the equator, also that the a/c is north of the equator and flying south.
As the a/c approaches the equator, doppler effect will cause an increase in measured frequency of the return signal in relation to the transmitted as the a/c effectively becomes closer to the satellite. This drops to zero offset as the a/c passes under the equator. Past the equator, the frequency will decrease as the effective distance from the satellite increases.
You can only get a 1d point fix from one satellite, but a 2d fix may be possible with two, depending on available data...