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Search: Posts Made By: RichardC10
Showing results 1 to 35 of 42
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Forum: Rumours & News
24th Jun 2014, 21:13
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

A communications engineer would be better placed...

A communications engineer would be better placed to comment, but a couple of points:

a. it seems that the system design wanted the pilot frequency generators (for correction of the uplink and...
Forum: Rumours & News
23rd Jun 2014, 23:21
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

Hyperveloce That group will have to speak...

Hyperveloce
That group will have to speak about the BTO/BFO comparison themselves. It doesn’t match the model I have proposed (it’s miles off the BFO model), otherwise it would have appeared in...
Forum: Rumours & News
23rd Jun 2014, 23:16
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

Gysbreght Just to keep this pot boiling,...

Gysbreght

Just to keep this pot boiling, some comments to try and back the position as stated in post #73! I will assume that the main issue is whether an exact match of a model to the data is...
Forum: Rumours & News
20th Jun 2014, 14:48
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

That works if you are using noiseless data, i.e....

That works if you are using noiseless data, i.e. exact measurements with no error. If there is an error on the data and a particular model fits the data (with error) exactly (each data point), then...
Forum: Rumours & News
20th Jun 2014, 06:05
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

Mesoman As you say, there is an additional...

Mesoman

As you say, there is an additional constant related to the delay in that type of AES (and probably other constants) that cannot be disentangled from the VT virtual altitude with the data...
Forum: Rumours & News
19th Jun 2014, 07:42
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

I will include that in a full run. Effectively...

I will include that in a full run. Effectively that is what I did in section 7.9 of the paper but didn't include much detail. It will need a different average speed from 18:29UT to 19:41UT, but that...
Forum: Rumours & News
19th Jun 2014, 05:41
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

I was trying to use the simplest possible model...

I was trying to use the simplest possible model that will satisfy the data to the level of error in that data, which I estimate to be ~2Hz, one sigma. So I have used two parameters only, the speed of...
Forum: Rumours & News
18th Jun 2014, 12:47
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

Inertial navigation failure, causing a drift in...

Inertial navigation failure, causing a drift in the platform? Perhaps we are drifting away from the ping data which is the subject of this thread. The ping data however interpreted shows the path...
Forum: Rumours & News
18th Jun 2014, 09:23
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

Not the Inmarsat version of course (no detail has...

Not the Inmarsat version of course (no detail has been released), but I can derive the numbers from my model.

Others will have to speak about waypoints. Here is the data for the track from my...
Forum: Rumours & News
18th Jun 2014, 08:32
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

BOAC, MM43 I think BOAC is right. The...

BOAC, MM43

I think BOAC is right. The elevation angles correspond to the ranges. In the Inmarsat promotional materials they show elevation angles across the geographical footprints of their...
Forum: Rumours & News
17th Jun 2014, 22:16
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

BBC Documentary

In the BBC Horizon documentary this evening, it was stated that Inmarsat's 'hotspot' for the location of MH370 was at around latitude 28S on the 00:19 arc position. This corresponds to the best fit...
Forum: Rumours & News
17th Jun 2014, 18:11
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

enjineerin That's interesting, I will run the...

enjineerin
That's interesting, I will run the numbers on that.

I saw that idea but I don't think it is a starter. Inmarsat have been running this system for years - errors would have been sorted...
Forum: Rumours & News
17th Jun 2014, 08:47
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

A model for interpreting the BFO data

Over the last couple of weeks I have been developing an analysis of possible tracks for MH370. After adjustment for a very small cumulative frequency drift term during the flight (2Hz), the final...
Forum: Rumours & News
12th Jun 2014, 17:41
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

It seems the aircraft terminal compensates for...

It seems the aircraft terminal compensates for the aircraft speed and direction of travel, but not rate of climb/descent. This can be seen in the BFO values between 16.30 and 17:15 where the initial...
Forum: Rumours & News
12th Jun 2014, 16:11
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

There is one negative BFO number in the log, but...

There is one negative BFO number in the log, but no negative BTO numbers. The nominal terminal concept does not apply to the BFO data. For the BFO the standard is the frequency of the response...
Forum: Rumours & News
12th Jun 2014, 06:51
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

Using the BTO data to get the ping rings

Here is my explanation of the Nominal Terminal concept, why it is used in the calculating the log values and how to utilise it with it in data analysis.

The Inmarsat notes say: “The BTO is a...
Forum: Rumours & News
8th May 2014, 17:54
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

The Atlantic Story

The problem with this story is that the reporter has gone to Inmarsat for fact-check and got "your story is entirely wrong" yet he has still published. Inmarsat are not the bad-guys here, it was not...
Forum: Rumours & News
5th May 2014, 22:03
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

@Datayq1 I have not moved anything. The ICAO...

@Datayq1
I have not moved anything. The ICAO report map refers to 'Updated Last Air Defense Radar Point' and the same point is on (a fuzzy copy of) the slide at the 29th April Beijing families...
Forum: Rumours & News
5th May 2014, 19:47
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

@Propduffer Mr Winter seems to have a good...

@Propduffer
Mr Winter seems to have a good Internet presence, e.g.
ATCA Technical Writing Awards (http://www.atca.org/atca-technical-writing-awards)

The last radar sighting at 18:22 is shown in...
Forum: Rumours & News
5th May 2014, 13:22
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

The independent report on the ICAO publication

Ref: Steve Winter’s report at:

Analysis: MH370 Preliminary Report | Air Traffic Management | Air Traffic Management - ATM and CMS Industry online, the latest air traffic control industry, CAA,...
Forum: Rumours & News
3rd May 2014, 12:41
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

The report analysis does not require a 'curved'...

The report analysis does not require a 'curved' track, that is to say a continuous turn. As I noted, the rate of change of heading (averaged over each leg) is not constant so each leg just averages...
Forum: Rumours & News
3rd May 2014, 11:07
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

Some thoughts on the ICAO report maps

The ICAO report analysis shows that routes can be generated from the start point to the final ping arc at a variety of speeds that are not impossible. Once a start point and a speed are selected...
Forum: Rumours & News
1st May 2014, 15:14
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

Full set of ICAO report documents ...

Full set of ICAO report documents

https://www.documentcloud.org/documents/1151155-mh370-preliminary-report.html
...
Forum: Rumours & News
30th Apr 2014, 14:17
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

Ping arc data modelling update

Following the post yesterday on the new satellite elevation graph, I have modelled a course with constant rate of turn that ends at the final search box, and which fits the elevation graph. As stated...
Forum: Rumours & News
29th Apr 2014, 14:00
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

Sorry, my poor labelling; '-' in the legend means...

Sorry, my poor labelling; '-' in the legend means 'minus'

So Final ping arc = 00:11UT
Ping arc - 1 = 22:41 Ping arc - 2 = 21:41
Ping arc - 3 = 20:41
Ping arc - 4 = ...
Forum: Rumours & News
29th Apr 2014, 12:11
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

It's called a scoop, I think. Possibly...

It's called a scoop, I think. Possibly photographed by one of the families.
Forum: Rumours & News
29th Apr 2014, 11:13
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

https://twitter.com/IvanCNN/status/460977558168043...

https://twitter.com/IvanCNN/status/460977558168043520/photo/1

Same reporter.
Forum: Rumours & News
29th Apr 2014, 08:46
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

Ping arc data released

Inmarsat ping-arc data released today via the Malaysian authorities
https://twitter.com/IvanCNN/status/460977558168043520/photo/1

Very first fit to the data is shown in figure 1 using a...
Forum: Rumours & News
24th Apr 2014, 13:14
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

The type of satellites which acquired the posted...

The type of satellites which acquired the posted images are in orbits fixed with respect to the Sun and so pass over the ground at fixed local times (generally each side of midnight/midday). These...
Forum: Rumours & News
28th Mar 2014, 09:20
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

Modelling the new route

I have looked at the potential ping modelling techniques in previous posts, and also the recently released INMARSAT Doppler data/model which I think I have understood.

The new AMSA map shows the...
Forum: Rumours & News
27th Mar 2014, 09:56
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

Without trying to be too negative these images...

Without trying to be too negative these images and the French images of yesterday look like ice. I took the picture below over seas to the South of Greenland a couple of years ago; height around...
Forum: Rumours & News
24th Mar 2014, 17:30
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

OleOle The differences between a great...

OleOle

The differences between a great circle and rhumb line are small for a track that is largely South and at these latitudes, and are hard to see at this scale. I looked at great circle, rhumb...
Forum: Rumours & News
24th Mar 2014, 16:45
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

Possible analysis of ping data

A few days ago Capt Kremin pointed out that if the autopilot was in a mode that maintained a constant magnetic heading, there would be a significant turn to the East at the latitudes of Australia due...
Forum: Rumours & News
23rd Mar 2014, 13:28
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

If MH370 wreckage found in Southern Indian ocean.....

@Capt Kremin

Nice one, very informative.

On the wind issue, a uniform wind over the track would be taken out in the fitting of the ping data, it is just a triangle of velocities. As you say, a...
Forum: Rumours & News
22nd Mar 2014, 19:32
Replies: 11,831
Views: 24,316,787
Posted By RichardC10

navman Quite so, I was expressing two...

navman
Quite so, I was expressing two options that might be modelled. On the line from Malaysia to West of Australia the great circle and constant heading courses to any particular point deviate...
Showing results 1 to 35 of 42
 
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