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Search: Posts Made By: awblain
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6th Apr 2014, 05:44
Replies: 58,121
Views: 10,868,400
Posted By awblain

Where are we, Holmes? If this picture shows...

Where are we, Holmes?

If this picture shows the natives, Watson, then it would appear we're not far from Oklahoma.
Forum: Tech Log
5th Apr 2014, 15:46
Replies: 20
Views: 10,341
Posted By awblain

Isn't it: clockwise looking at the spinner -...

Isn't it:
clockwise looking at the spinner - RR;
anti-clockwise - everyone else?
4th Apr 2014, 12:19
Replies: 11,831
Views: 23,816,006
Posted By awblain

"We" don't have much choice in that regard, since...

"We" don't have much choice in that regard, since it's "their" system that has yielded the results, and "they" know more about how it works than anyone else.

If they say too much about how their...
4th Apr 2014, 10:25
Replies: 11,831
Views: 23,816,006
Posted By awblain

Since Tireless was reported to have arrived in...

Since Tireless was reported to have arrived in the general area on Monday 31st, that press release would seem to have been substantially overtaken by events.

Dangling a single microphone on a...
4th Apr 2014, 09:55
Replies: 11,831
Views: 23,816,006
Posted By awblain

Inmarsat are not the enemy here - they're the...

Inmarsat are not the enemy here - they're the only organization that's provided any useful information whatsoever to the search.

Inmarsat have gone far beyond where they need to go in providing...
2nd Apr 2014, 14:49
Replies: 58,121
Views: 10,868,400
Posted By awblain

Yes, yes, Danny Boy… I've heard it all before......

Yes, yes, Danny Boy… I've heard it all before... Everyone claims to have a broad sword.
31st Mar 2014, 20:15
Replies: 1,147
Views: 484,842
Posted By awblain

"Well they would say that, wouldn't they?" Mandy...

"Well they would say that, wouldn't they?" Mandy Rice-Davies.



Owing to them not making it safely to 21 years, they need to make this submission to the NTSB.

Other airlines have avoided...
31st Mar 2014, 17:50
Replies: 11,831
Views: 23,816,006
Posted By awblain

Even if that happened, the problem would be...

Even if that happened, the problem would be timing. The relative timing of receipt by ground-based VHF probably won't be precise enough to use. The ground-signal travels a few hundred km, while the...
31st Mar 2014, 14:22
Replies: 11,831
Views: 23,816,006
Posted By awblain

Lonewolf, It's been about 550 hours since...

Lonewolf,

It's been about 550 hours since the disappearance. How accurate a tracked-back position is even a large number of drifting fragments now going to provide realistically?

To try to be...
31st Mar 2014, 13:20
Replies: 74
Views: 39,488
Posted By awblain

hoodie, Given the modest resolution of the...

hoodie,

Given the modest resolution of the picture, and the unknown color of the underside of the boat tail, it's not impossible it's an X47. To be more sure you'd need to blur the image using...
31st Mar 2014, 13:04
Replies: 11,831
Views: 23,816,006
Posted By awblain

There are two pieces of information - i)...

There are two pieces of information -

i) the Doppler shift, revealing the instantaneous speed along the line between the satellite and aircraft during the "ping". Various three-dimensional...
31st Mar 2014, 09:01
Replies: 11,831
Views: 23,816,006
Posted By awblain

etudiant It's a bit more pessimistic...

etudiant



It's a bit more pessimistic than that. Rather, the current detail is "it's somewhere in a 500-mile swath N-S that extends from 1000-2500 miles away". So, keep your eyes open too...
29th Mar 2014, 14:23
Replies: 11,831
Views: 23,816,006
Posted By awblain

Feel free to delete if this is not helpful - or...

Feel free to delete if this is not helpful - or ask me to delete in a PM.



I don't work for Inmarsat, but I know a certain amount about satellite and radio systems, inference and imaging.
...
29th Mar 2014, 10:49
Replies: 11,831
Views: 23,816,006
Posted By awblain

Ian I think you summarize very nicely. ...

Ian

I think you summarize very nicely.



If it's right.

There shouldn't be a reward for the people (not necessarily the technical team - it could be the Australian cabinet office) who...
29th Mar 2014, 00:14
Replies: 11,831
Views: 23,816,006
Posted By awblain

I find it very hard to understand why almost a...

I find it very hard to understand why almost a whole week's time and effort was spent searching an area 2500 miles from Perth, when a better analysis of the satellite communications data on Friday...
Forum: Tech Log
28th Mar 2014, 23:12
Replies: 30
Views: 7,734
Posted By awblain

A sq, The three concentric shafts on the...

A sq,

The three concentric shafts on the engines swap direction from inside to outside - but all the same way on all of the engines.

It avoids the need for a set of stator vanes between...
Forum: Tech Log
28th Mar 2014, 18:23
Replies: 30
Views: 7,734
Posted By awblain

And the Trent 900 on the A380, and presumably the...

And the Trent 900 on the A380, and presumably the A350 engine too, is counter-counter-rotating.
Forum: Questions
27th Mar 2014, 16:57
Replies: 10
Views: 3,771
Posted By awblain

That track on the map is south of the direct...

That track on the map is south of the direct route, which crosses Mongolia, stays in Russia skirting Kazakhstan, and over St Petersburg to Paris.

If the route was modified south to avoid bits of...
25th Mar 2014, 16:14
Replies: 62
Views: 10,266
Posted By awblain

Let's not confuse the members of the Gestapo that...

Let's not confuse the members of the Gestapo that murdered the escapees after they were recaptured with regular Germans.

What type of character volunteers to be a secret policeman for a brutal...
25th Mar 2014, 13:32
Replies: 1,069
Views: 259,054
Posted By awblain

Damn. If only they'd spread that news around a...

Damn. If only they'd spread that news around a few weeks ago. :)

Although, if the eastern basin is - or is manufactured to be - majority Russian, then the argument of self determination could just...
25th Mar 2014, 12:34
Replies: 1,069
Views: 259,054
Posted By awblain

A coalition of the willing to Ukraine? Not...

A coalition of the willing to Ukraine?

Not unless Ukraine discovers gas on its territory rather than just in a pipe that runs across its territory. And, the approval for the coalition would run...
24th Mar 2014, 17:08
Replies: 11,831
Views: 23,816,006
Posted By awblain

Richard, Under similar assumptions does...

Richard,

Under similar assumptions does that rule out the Northern route? I assume that must require a weird combination of speed and track changes to remain consistent with the timings.
...
Forum: Tech Log
24th Mar 2014, 16:58
Replies: 156
Views: 31,441
Posted By awblain

Oggers, You may wish to avoid selectively...

Oggers,

You may wish to avoid selectively quoting part of one statement, instead of including the relevant bit that "2000 feet gain being reasonable", and not adding in a separate completely...
24th Mar 2014, 14:46
Replies: 11,831
Views: 23,816,006
Posted By awblain

That's all very well and good, but it doesn't do...

That's all very well and good, but it doesn't do anything for finding the wreckage and the recorders. Unless someone has some radar data or intercepted Inmarsat broadcasts, then the mystery is...
24th Mar 2014, 09:30
Replies: 11,831
Views: 23,816,006
Posted By awblain

Dillboy, Only when Inmarsat's senior people...

Dillboy,

Only when Inmarsat's senior people appear wandering round London in sackcloth and ashes. They've been very clear.

Before the Inmarsat statement, there was no reason to look anywhere...
23rd Mar 2014, 23:41
Replies: 17
Views: 4,201
Posted By awblain

I guess that's even for the RF4 in 2012. ...

I guess that's even for the RF4 in 2012.

If I remember there's been at least one Syrian helicopter brought down too during the current hostilities.
23rd Mar 2014, 22:57
Replies: 11,831
Views: 23,816,006
Posted By awblain

500N, Fair enough... if it's a ship...

500N,

Fair enough... if it's a ship dedicated to accident investigation rather than a commercial vessel, then that's not so indicative that there is yet any work for it to do.
23rd Mar 2014, 22:32
Replies: 11,831
Views: 23,816,006
Posted By awblain

Now the despatch of ROV operating ships indicates...

Now the despatch of ROV operating ships indicates the commitment of real money, or at least an absence of other gainful work.

Sounds like evidence that's there's going to be something to find.
23rd Mar 2014, 21:54
Replies: 11,831
Views: 23,816,006
Posted By awblain

Given the quality of the information that has...

Given the quality of the information that has made the current search area the current search area, a single P8 seems to be an appropriate commitment of resources from non-locals.

If and when...
23rd Mar 2014, 21:09
Replies: 11,831
Views: 23,816,006
Posted By awblain

I'll stick my neck out and hazard that the French...

I'll stick my neck out and hazard that the French have had a good long look through their satellite radar and seen something interesting. If the US (and maybe Russia and China?) can do the same with...
23rd Mar 2014, 20:25
Replies: 11,831
Views: 23,816,006
Posted By awblain

I think you'll find that more sophisticated space...

I think you'll find that more sophisticated space imagery users have high-bandwidth relay satellites. Sensitive information need never travel down from low Earth orbit.

As to changing orbit - it...
22nd Mar 2014, 16:01
Replies: 11,831
Views: 23,816,006
Posted By awblain

McLaughlin might not have meant that all (eight?)...

McLaughlin might not have meant that all (eight?) distances (0111-0811) to the satellite were monotonically increasing - perhaps just the final few.

If he did mean that all eight distances were...
22nd Mar 2014, 13:47
Replies: 11,831
Views: 23,816,006
Posted By awblain

The lack of a beacon signal also indicates...

The lack of a beacon signal also indicates something: either a hard impact or a safe landing in the north or a quick sinking in the south. A sinking in the South makes more sense to me.

If it's...
22nd Mar 2014, 13:24
Replies: 11,831
Views: 23,816,006
Posted By awblain

From their own data, Inmarsat can't say whether...

From their own data, Inmarsat can't say whether it was going North or South: they inferred that North was unlikely, as someone would have seen it go by.
22nd Mar 2014, 12:30
Replies: 11,831
Views: 23,816,006
Posted By awblain

Inmarsat know what they're doing. When they say...

Inmarsat know what they're doing. When they say how far the aircraft was from their 64E satellite at 11 minutes past the hours they can be trusted.

They're about the only originator of useful...
Showing results 1 to 35 of 633
 


 
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