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Search: Posts Made By: Vinnie Boombatz
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Forum: Rumours & News
10th Oct 2014, 19:56
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Inmarsat Paper

@megan - 8 Oct 2014 15:58 -- Thanks for the link to the Inmarsat paper! A very detailed explanation of their processing, and the evolution.

Some observations made in the paper:

"While the...
Forum: Rumours & News
18th Sep 2014, 20:43
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Sep 9 update by Duncan Steel, Michael Exner, Tim...

Sep 9 update by Duncan Steel, Michael Exner, Tim Farrar et al:

MH370 Search Area Recommendation | Duncan Steel (http://www.duncansteel.com/archives/1023)
...
Forum: Rumours & News
13th Sep 2014, 00:47
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

ATSB Updates

Some new material posted by ATSB.

MH370 (http://www.atsb.gov.au/mh370.aspx)

3D map of sea floor (2.2 MB) in search area:

http://www.atsb.gov.au/media/5092636/3dmodel_seafloor_terrain.jpg
...
Forum: Rumours & News
9th Jul 2014, 19:44
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

INMARSAT 3-F1 Position Data

@Propduffer on 9th Jul 2014, 00:23--

John Zweck, an Australian Ph.D. in math now teaching at UT/Dallas, has posted satellite trajectory data in 1 second steps at:

Aqqa on MH370...
Forum: Rumours & News
20th Jun 2014, 23:48
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Update on MH370 Search...

Update on MH370 Search (http://www.jacc.gov.au/media/releases/2014/june/mr051.aspx)

"The search area will be confirmed before the end of June, after completion of extensive collaborative analysis...
Forum: Rumours & News
18th Jun 2014, 01:09
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Aircraft Speed Assumptions

From an aircraft standpoint, the speeds shown in many recent trajectory hypotheses seem unreasonably low.

Aircraft tend to attain maximum cruise range over a rather small range of Mach numbers,...
Forum: Rumours & News
18th Jun 2014, 00:34
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Mach Numbers

For a standard atmosphere (1959 ARDC, 1962 ICAO, 1976 NOAA/NASA/USAF), temperature at sea level is 288.16 K, the tropopause is at 11 km altitude, and temperature decays linearly at 6.5 K/km to 216.66...
Forum: Rumours & News
17th Jun 2014, 02:10
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

INMARSAT Claim

BBC News - Malaysian MH370: Inmarsat confident on crash 'hotspot' (http://www.bbc.com/news/science-environment-27870467)

"The UK satellite company Inmarsat has told the BBC that the search for ...
Forum: Rumours & News
12th Jun 2014, 19:54
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Satellite Orbits

For those who want to calculate INMARSAT 3-F1 position and velocity themselves:

AGI markets a number of software packages that calculate satellite orbits

AGI Blog...
Forum: Rumours & News
12th Jun 2014, 19:40
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Some Other On-Line Analyses

First, a big H/T to mm43 for setting up this thread.

One of the first posts on pprune on trying to replicate the earliest released INMARSAT data was by hamster3null on 28 Mar 2014 at 02:13:
...
Forum: Rumours & News
2nd Jun 2014, 18:08
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Inmarsat Satellite Position and Velocity

@BOAC at 1st Jun 2014, 23:54 :

I calculate that Inmarsat 3-F1 reached its furthest North latitude at about 19:33 UTC on 7 March.

This site has a table of satellite positions at the "ping"...
Forum: Rumours & News
27th May 2014, 00:46
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

@Shadoko on 26th May 2014, 11:16 ...

@Shadoko on 26th May 2014, 11:16

The satellite moved slightly over 1 degree in latitude over 6 hours, and far less in longitude.

Farthest North at the 19:41 ping (1.63...
Forum: Rumours & News
25th Apr 2014, 00:26
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

US Department of Defense Update

http://www.defense.gov/news/newsarticle.aspx?id=122122

"WASHINGTON, April 24, 2014 – The Defense Department is continuing to support the international search mission for missing Malaysia Airlines...
Forum: Rumours & News
17th Apr 2014, 21:10
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Chinese Deep-Sea Submersible Jialong

Malaysia airliner search points up China's technology gap - latimes.com (http://www.latimes.com/world/asia/la-fg-china-malaysia-plane-20140417,0,883028.story)

"Chinese officials might be worried...
Forum: Rumours & News
14th Apr 2014, 02:49
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Apr 14 Search Areas

The sonobuoy portion of today's search, roughly a square 25 km on a side, is centered at roughly 26 S, 101.5 E:

http://www.jacc.gov.au/media/releases/2014/april/mr_021-4.jpg

That appears to...
Forum: Rumours & News
9th Apr 2014, 20:58
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

The Sea Floor

BBC News - Missing Malaysia plane: Search 'regains recorder signal' (http://www.bbc.com/news/world-asia-26950387)

"Other key points made by ACM Houston:
- Searchers have no idea what the sea...
Forum: Rumours & News
9th Apr 2014, 15:43
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Acoustic Signal Strength

No Cookies | Perth Now (http://www.perthnow.com.au/news/missing-malaysia-airlines-flight-mh370-more-signals-detected/story-fniztvnf-1226878441833)

" 'It looks like the signals we’ve picked up...
Forum: Rumours & News
8th Apr 2014, 01:09
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Underwater Acoustics Handbook

A nice handbook, though the last half on marine mammals is of less relevance here:

http://oalib.hlsresearch.com/PocketBook%203rd%20ed.pdf

The ULB frequency of 37.5 kHz falls on the right side...
Forum: Rumours & News
7th Apr 2014, 21:30
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Some Graphics in a BBC Story

BBC News - Search for MH370 switches underwater (http://www.bbc.com/news/world-asia-26923235)

(Image removed -- click on above link to see source)
Forum: Rumours & News
7th Apr 2014, 05:11
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

A map: ...

A map:

https://twitter.com/SteveGrzanich/status/453029822722097152/photo/1/large

Water depth reportedly 4,500 m.

https://twitter.com/cctvnews/status/453026447024586752/photo/1

Australian...
Forum: Rumours & News
3rd Apr 2014, 01:28
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Remarks of Tony Tyler at the IATA OPS Conference, Kuala Lumpur

IATA - Remarks of Tony Tyler at the IATA OPS Conference, Kuala Lumpur (http://www.iata.org/pressroom/speeches/Pages/2014-04-01-01.aspx)

"Speculation—of which there has been much—will not make...
Forum: Rumours & News
2nd Apr 2014, 19:08
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

More Easterly Search Areas

#MH370 search areas in perspective...
Forum: Rumours & News
1st Apr 2014, 22:14
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

IATA Operations Conference

IATA chief: 'We cannot let an aircraft simply vanish' - 4/1/2014 - Flight Global (http://www.flightglobal.com/news/articles/iata-chief-39we-cannot-let-an-aircraft-simply-vanish39-397662/)
...
Forum: Rumours & News
31st Mar 2014, 21:19
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Excerpts from AF 447 Report by BEA

From a volume of the BEA reports on AF 447:

http://www.bea.aero/fr/enquetes/vol.af.447/sea.search.ops.af447.05.11.2012.en.pdf

"As a rule, acoustic searches should always be preferred during the...
Forum: Rumours & News
29th Mar 2014, 22:03
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

@hamster3null (#8555, 28 Mar 2014, 02:13) ...

@hamster3null (#8555, 28 Mar 2014, 02:13)

Excellent spreadsheet!

The problem is made harder by having two sources of Doppler -- aircraft motion and satellite motion.

Even for a stationary...
Forum: Rumours & News
25th Mar 2014, 20:09
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Geomagnetic South Pole

Thanks to A69 (*8052) and flt001 (*8068) for posting the link to the AAIB data.

A lot of posters have stated that the autopilot in TRK mode would follow a constant magnetic heading.

The...
Forum: Rumours & News
23rd Mar 2014, 00:25
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

ULBs

A bit premature, but in the hope that this incident gets to this phase, here's some data on recovery of flight recorders and underwater locator beacons (ULBs).

The Wikipedia page on ULBs
...
Forum: Rumours & News
21st Mar 2014, 20:39
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Some (Inconclusive) INMARSAT Info

A few definitions:

In the following the aircraft can be referred to as the UT (user terminal) or the AES (Aircraft Earth Station).

In the FCC documents, "downlink" is from the satellite,...
Forum: Rumours & News
21st Mar 2014, 00:42
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Gulfstream

The Japan Coast Guard has been flying a Gulfstream:

Sailors looking out windows trump technology in jetliner search | Malaysia | The Malay Mail Online...
Forum: Rumours & News
20th Mar 2014, 22:16
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Underwater Locator Beacon Search

The AF447 report lists the effective range of the ULBs on the two recorders as 2 to 3 km. That's slant range, so if the water is deep, the hydrophones need to be lowered substantially, and of course...
Forum: Rumours & News
20th Mar 2014, 00:34
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Apologies if this was already posted: AMSA...

Apologies if this was already posted:

AMSA :: Australian Maritime Safety Authority (http://www.amsa.gov.au/media/)

Most recent John Young press conference (excerpted on BBC):
...
Forum: Rumours & News
19th Mar 2014, 01:35
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

Geosynchronous vs. Geostationary

There are 2 operational INMARSAT satellites that were within view of MH370 at various times. A 3rd satellite, INMARSAT-5 F1 was launched in December 2013, but is still undergoing on-orbit tests...
Forum: Rumours & News
15th Mar 2014, 16:22
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

INMARSAT Coverage

Some satellite visibility plots and satellite antenna pattern plots here:

BGAN Coverage Map & Details (http://www.groundcontrol.com/bgan_coverage_map.htm)

Spot beam footprints:
...
Forum: Rumours & News
15th Mar 2014, 00:11
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

FIR Boundaries

@Physicus (#3579):

You can zoom in here:

ArcGIS Viewer for Flex (http://gis.icao.int/flexviewer/)

Some FIR boundaries look similar, some don't. The ICAO boundary between Thailand and...
Forum: Rumours & News
11th Mar 2014, 17:20
Replies: 11,831
Views: 24,358,192
Posted By Vinnie Boombatz

There have been a lot of references to AF 447,...

There have been a lot of references to AF 447, many implying that oil slicks or debris was found quickly. Conversely, BEA reported at least 5 days between loss of aircraft and first sightings.
...
Showing results 1 to 35 of 35


 
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