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Search: Posts Made By: auv-ee
Showing results 1 to 35 of 95
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Forum: Tech Log
23rd Apr 2011, 02:48
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

Oops, I got very little sleep last night. ...

Oops, I got very little sleep last night.

The REMUS vehicles have several nx100GB hard drives for the camera, SS sonar and other data. There is little problem with HDs in AUVs, though 250GB solid...
Forum: Tech Log
23rd Apr 2011, 02:23
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

The quote from Phillips refers to the horizontal...

The quote from Phillips refers to the horizontal movement of the ship. The delay is related to the depth of the operation (and various cable parameters), but the half-hour figure is applicable at...
Forum: Tech Log
23rd Apr 2011, 00:00
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

With an AUV there is no such thing as looking at...

With an AUV there is no such thing as looking at something that has not been recorded. There is no significant bandwidth between the bottom and the surface, so everything is recorded blind and...
Forum: Tech Log
22nd Apr 2011, 20:40
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

99,994 photos?

Some have wondered:

I think lomapaseo is correct about why only 6 photos were released (why would BEA release more?). But I wonder where the 100,000 number came from. I am not aware that BEA has...
Forum: Tech Log
17th Apr 2011, 04:04
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

HarryMann: I am generally aware of the...

HarryMann:

I am generally aware of the effect of Reynold's Number on drag regimes, but as this is not my area (I am an EE, as JD says), I can only say that it is my understanding, from having...
Forum: Tech Log
16th Apr 2011, 04:33
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

That is the way the image looks to me. I don' t...

That is the way the image looks to me. I don' t know if that interpretation is supported by any other current data. At this point, the debris dispersion may be the only evidence of the actual...
Forum: Tech Log
16th Apr 2011, 00:33
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

This phenomenon was just discussed in posts 3550...

This phenomenon was just discussed in posts 3550 and 3553, above, and is, I believe, applicable to the Titanic.
Forum: Tech Log
15th Apr 2011, 20:48
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

Generally agreed with your post, except this...

Generally agreed with your post, except this statement. Perhaps you meant something else. The density of water changes very little (some, but not much) with increasing pressure. The form-drag (in...
Forum: Tech Log
15th Apr 2011, 12:25
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

See post 3169...

See post 3169 http://www.pprune.org/6357167-post3169.html for most of this info. The published image appears to be mosaic of two images, one looking east (from the west side of image) and one looking...
Forum: Tech Log
15th Apr 2011, 01:17
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

Scale

PickyPerkins: Very nice, thank you. I rest my case.
Forum: Tech Log
15th Apr 2011, 01:06
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

I think that is mainly what is to be learned....

I think that is mainly what is to be learned. (I'd love to be wrong about that.) It would be interesting to rework the current data provided by Hyperveloce...
Forum: Tech Log
15th Apr 2011, 00:30
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

CS, mm43, and perhaps swordfish41, With all...

CS, mm43, and perhaps swordfish41,

With all due respect, I think you may be trying to read too much into a few low resolution blips in a sonar image. The dark spot does look like a shadow, but if...
Forum: Tech Log
14th Apr 2011, 21:56
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

Water pressure does not affect people that way. ...

Water pressure does not affect people that way. The only cavities in the body are the lungs, sinuses and the windpipe between them. All other parts are water filled and will equalize to the ambient...
Forum: Tech Log
14th Apr 2011, 02:40
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

Agreed, that is the correct interpretation. At...

Agreed, that is the correct interpretation. At this resolution, I can't tell which end of the field has the heavy parts, but it looks like the eastern side.

Some of the distribution of debris...
Forum: Tech Log
14th Apr 2011, 01:28
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

Are you still uncertain as to the approximate...

Are you still uncertain as to the approximate location of the debris? The plan was to work north to south across the area not searched in Phase 2/3 that is within the 20nm radius, then to proceed...
Forum: Tech Log
13th Apr 2011, 03:20
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

Because the AUV cameras look straight down from...

Because the AUV cameras look straight down from the altitude of the AUV, probably 10m (+/-5m). Hopefully, the recorders are still in the tail, and simply can't be seen when viewed directly from...
Forum: Tech Log
13th Apr 2011, 00:28
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

New AP article has BEA statement about the tail and black boxes

This article from AP quotes BEA confirming that the tail has been found but emphasising that the black boxes have not been seen.

News Headlines (http://www.cnbc.com/id/42559095)
Forum: Tech Log
12th Apr 2011, 17:08
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

Second or thrid hand info claims location of tail section

In this article:

Air France Crash-Search Closer to (http://www.bloomberg.com/news/2011-04-12/air-france-crash-search-closer-to-black-boxes-as-tail-is-found.html)

Is the following quote:

This...
Forum: Tech Log
11th Apr 2011, 19:53
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

More on 2010/04/11 BEA meeting

Nothing new on the recovery, but more insight into the relations between France and the families:

Frana nega representante de famlias no resgate do voo 447...
Forum: Tech Log
11th Apr 2011, 18:56
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

Update on 2010/04/11 meeting between BEA and family representatives

Tour Hebdo - site officiel - Transport : AF 447 : les éléments de l'avion rapatriés mi-juin...
Forum: Tech Log
9th Apr 2011, 18:30
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

BEA Search Summary

There is a new note from Jean-Paul Troadec posted on BEA's AF447, Phase-4 page. It summarizes the searches to-date on the occasion of terminating Phase 4, but, unfortunately, it provides no new...
Forum: Tech Log
8th Apr 2011, 14:21
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

BEA Announces Ship for Phase 5

Just posted to:

Sea Search Operations, phase 4 (http://www.bea.aero/en/enquetes/flight.af.447/sea.search.ops.phase.4.php)
Forum: Tech Log
7th Apr 2011, 23:16
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

Resolution of sonar images

The speed of sound in water is approximately 1500 m/s (it varies in important ways with temperature, salinity and pressure, but that is not relevant to this question). The wavelength at 120kHz is...
Forum: Tech Log
7th Apr 2011, 16:56
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

BEA Update

This just posted at:

Sea Search Operations, phase 4 (http://www.bea.aero/en/enquetes/flight.af.447/sea.search.ops.phase.4.php)

Information, 7 April 2011
The team on board the Alucia will...
Forum: Tech Log
7th Apr 2011, 13:39
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

A BBC update from this morning claims that there...

A BBC update from this morning claims that there will be a meeting with families in "two weeks".

BBC News - Conflicting emotions of Air France crash relatives...
Forum: Tech Log
7th Apr 2011, 01:59
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

Debris Location and Original Storm System

Not the info from Tim Vasquez, but I have added an image from BEA's track plot for 02:14:30 to my Googleearth layers for AF447. The dark orange part of the storm nearly fills the 40nm radius search...
Forum: Tech Log
6th Apr 2011, 02:12
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

Seems to me that is exactly what was done. ...

Seems to me that is exactly what was done. 15,000 km^2 is a lot of area to search, so BEA was very interested in any way to reduce that area (for Phase 3). The drift study seemed like a plausible...
Forum: Tech Log
4th Apr 2011, 15:16
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

This AP report mentions what pictures were shown...

This AP report mentions what pictures were shown at the press conference (does not show them). Otherwise it does not contain much more information than what takata already posted.

Quad-Cities...
Forum: Tech Log
4th Apr 2011, 00:14
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

AFP: Parts of Rio-Paris jet wreckage found:...

AFP: Parts of Rio-Paris jet wreckage found: official (http://www.google.com/hostednews/afp/article/ALeqM5gUhM9bWtTjyMmQFCMssljyoc5mgA?docId=CNG.34b89149aa6e7d06680c9cf785978729.f61)
Forum: Tech Log
3rd Apr 2011, 23:02
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

Probably not. I believe that Phase 4 will end...

Probably not. I believe that Phase 4 will end after the debris field has been adequately mapped and photographed; probably later this week.
Forum: Tech Log
31st Mar 2011, 20:00
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

Remember that any recovery will be performed with...

Remember that any recovery will be performed with a different ship, assets and crew. I would not expect anyone from the WHOI/GOMAR contingent to be aboard for Phase 5, unless it was for data...
Forum: Tech Log
31st Mar 2011, 17:12
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

dazdaz1: The location of an oil drum was...

dazdaz1:

The location of an oil drum was performed by the side-scan sonar. The use of any acoustic imaging, such as side-scan, requires a trade-off between resolution and range. At the frequency...
Forum: Tech Log
31st Mar 2011, 13:12
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

There is a new article on USA Today. While not...

There is a new article on USA Today. While not presenting any new information, it does summarize the situation well and clearly discusses the rational and methods of the Phase 4 search.

Robots...
Forum: Tech Log
27th Mar 2011, 15:29
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

The present search (Phase 4) is funded by Air...

The present search (Phase 4) is funded by Air France and Airbus, probably equally.

The Phase 3 search (Spring of 2010) was also funded by AF and AB.

I'm not sure who paid for the Phase 2 sonar...
Forum: Tech Log
26th Mar 2011, 16:28
Replies: 3,893
Views: 1,543,036
Posted By auv-ee

WHOI Press Release

Last week WHOI issued a press release that provides some additional technical detail that has not appeared accurately before.

News Release : WHOI Conducts Latest Search for Air France Flight 447 :...
Showing results 1 to 35 of 95
 
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