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Search: Posts Made By: Sallyann1234
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Forum: Tech Log
25th Feb 2010, 10:28
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

Existing systems cannot provide this requirement...

Existing systems cannot provide this requirement which is for continuous, fast and reliable data simultaneously from hundreds of aircraft moving at high speed. Ask any provider for a quotation!

...
Forum: Tech Log
23rd Feb 2010, 20:38
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

Good post mm43 This thread should revert to...

Good post mm43

This thread should revert to its original purpose.
Forum: Tech Log
23rd Feb 2010, 15:59
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

Not if they are all on the same frequency and...

Not if they are all on the same frequency and unsychronised.

Consider the same thing happening on an HF or VHF voice channel. If a hundred pilots press their buttons at the same time and transmit...
Forum: Tech Log
22nd Feb 2010, 20:44
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

It appears that AF447 flew into an intense...

It appears that AF447 flew into an intense tropical storm.
The aircraft was subjected to extreme attitude changes, dense rain, and electrical interference. Any one of those effects could have...
Forum: Tech Log
22nd Feb 2010, 16:15
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

@ rgbrock, No, addressing is a simple matter. ...

@ rgbrock,
No, addressing is a simple matter.

The issue is that you cannot have a large number of transmitters each sending continuous streams of data at random because the receiver in the...
Forum: Tech Log
22nd Feb 2010, 10:41
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

@jox Most of what you say is entirely correct....

@jox
Most of what you say is entirely correct. A suitably processed data stream of requisite speed can be sent from an aircraft via satellite to a ground station. The technology has been around for...
Forum: Tech Log
19th Feb 2010, 22:22
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

You do need Javascript enabled in your browser...

You do need Javascript enabled in your browser and your firewall.
Forum: Tech Log
11th Feb 2010, 15:09
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

Not again, please! :ugh: It's pointless putting...

Not again, please! :ugh:
It's pointless putting substitute data provision where is not needed (FDR lands on the ground), instead of where it is needed (FDR falls into the ocean).
Forum: Tech Log
8th Jan 2010, 10:52
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

Microphones are delicate things. Would the...

Microphones are delicate things.
Would the proponents of such a system kindly propose a design for a suitably small, light and low-powered receiver transducer that could function reliably under a...
Forum: Tech Log
6th Jan 2010, 09:49
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

Wake up Mods!

It's time this thread was locked, a new one opened for AF447 discussion only, and another in Jet Blast for impossible crackpot ideas.
Forum: Tech Log
27th Dec 2009, 17:10
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

No-one else likes it either. But in a world...

No-one else likes it either.

But in a world where airlines are struggling to survive, it is simply unrealistic to expect them to spend huge amounts of capital and further commit to ongoing loss of...
Forum: Tech Log
23rd Dec 2009, 22:22
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

Perhaps even quasi-synchronous :)

Perhaps even quasi-synchronous :)
Forum: Tech Log
23rd Dec 2009, 21:26
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

Unfortunately, no. 100Mbs from one aircraft...

Unfortunately, no.
100Mbs from one aircraft would be easy.
But we don't have that, we have 1,000 separate data streams sent up to the satellite receiver. The transmissions can't be sent up blind...
Forum: Tech Log
23rd Dec 2009, 18:16
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

Thank you Christiaan. So to build a system that...

Thank you Christiaan.
So to build a system that is reasonably future-proof you will need 100kbps per aircraft, 1000 aircraft over the Atlantic, total 100 Megabits.

The challenge will be to design...
Forum: Tech Log
23rd Dec 2009, 09:34
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

ChristiaanJ It should be quite possible to...

ChristiaanJ
It should be quite possible to scope the total bandwidth that would be required for a continuous uplink system to cover e.g. the Atlantic. I'm sure that it has already been done many...
Forum: Tech Log
10th Dec 2009, 08:25
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

You may as well say that we should not develop...

You may as well say that we should not develop new drugs to save a few lives in the West, while thousands are starving in Ethiopia.

It is up to each of us to do the best we can in our own field of...
Forum: Tech Log
9th Dec 2009, 21:43
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

ChristiaanJ, I did mention the dye marker...

ChristiaanJ,
I did mention the dye marker previously, but it seems so obvious that I would not claim to be first with the suggestion.
I have seen dye markers used in a marine trial, and the range...
Forum: Tech Log
9th Dec 2009, 21:11
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

rcsa You not only gave Galileo the...

rcsa



You not only gave Galileo the wrong name, but a totally inaccurate description.

Perhaps you would care to justify your criticism (in a more appropriate section of this forum) ?
Forum: Tech Log
9th Dec 2009, 20:57
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

Not so. A few solid blocks of dye clamped to...

Not so. A few solid blocks of dye clamped to heavy parts of the airframe would present no safety issues whatsoever. They could remain in place for the life of the airframe, and only start dissolving...
Forum: Tech Log
23rd Nov 2009, 12:35
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

NOT a simple idea. Fuel discharged at...

NOT a simple idea.


Fuel discharged at altitude scatters over a large area and largely evaporates.


In the case of AF447 there was little trace of fuel. How would a marker within it have...
Forum: Tech Log
19th Nov 2009, 13:31
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

Agreed. Chemical analysis would not be practical....

Agreed. Chemical analysis would not be practical.

I envisage a slick of dye emerging on the surface downstream of the wreckage on the seabed, which in clear weather would be visible to a wide-area...
Forum: Tech Log
18th Nov 2009, 11:17
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

@christiaanJ I have seen marker dye deployed...

@christiaanJ
I have seen marker dye deployed from a liferaft during a maritime exercise. The distance that it could be seen from the air was amazing - long before the raft itself was seen. The size...
Forum: Tech Log
17th Nov 2009, 17:07
Replies: 3,893
Views: 1,536,972
Posted By Sallyann1234

Simplest ideas are usually the quickest to...

Simplest ideas are usually the quickest to deploy, and often the most reliable.

Place one or more blocks of bog-standard marker dye under seats or behind panels.

The passenger compartment...
Showing results 1 to 23 of 23


 
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