PPRuNe Forums - Search Results
PPRuNe Forums

Go Back  PPRuNe Forums > Search Forums
Reload this Page >

Search Results

Register
FAQ
Calendar
Wikiposts
Today's Posts
Search
Vendor Directory
Search: Posts Made By: UnreliableSource
Showing results 1 to 19 of 19
Search took 0.00 seconds.
Forum: Rumours & News
30th Mar 2014, 09:21
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

Not tardy at all. Look, the overall search...

Not tardy at all.

Look, the overall search has different areas of possibility. The possibility of a crash closer to Malaysia has been declining, but was not zero.

Malaysian assets have been...
Forum: Rumours & News
29th Mar 2014, 19:40
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

The Australian government is searching the most...

The Australian government is searching the most likely locations. What would you have them do, search the least likely locations?

Of course, if the wreckage if found at a given lat/lon then all...
Forum: Rumours & News
29th Mar 2014, 09:04
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

The lower the frequency the more power is...

The lower the frequency the more power is required to generate the sound.

Think about subwoofers in a stereo system; generally there is more amp power going to fill out the lowest octave than is...
Forum: Rumours & News
29th Mar 2014, 02:38
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

Doppler shift gives you radial speed relative to...

Doppler shift gives you radial speed relative to the satellite. ie, a hypothetical plane flying a curved track along the 40 degree contour would have zero doppler shift (and constant ping time.) ...
Forum: Rumours & News
27th Mar 2014, 11:25
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

That sometimes happens in b&w images...

That sometimes happens in b&w images...
Forum: Rumours & News
26th Mar 2014, 19:28
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

Improving the inmarsat data.

To improve the precision of the inmarsat data two things could be done:

1. Hand the data over to some radio astronomers. Their toolset for dealing with signals is outstanding.

2. Fly a...
Forum: Rumours & News
26th Mar 2014, 02:26
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

Inmarsat

No. At an earth station the incoming RF effectively filtered and downconverted to extract a section of the RF they care about. This downconvered segment is called an IF, and will be a much much...
Forum: Rumours & News
25th Mar 2014, 20:31
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

Inmarsat

Normal telecoms (digital side of the sat modem at the earth station) would not yield anything useful. It is possible the raw analogue RF was being digitised and captured for diagnostic purposes. I...
Forum: Rumours & News
25th Mar 2014, 12:18
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

Inmarsat

The inmarsat information with logon/logoff probes pretty well confirms that MAS was an active customer. No network provider would be probing non-customers in this way.

I had picked up the no sat...
Forum: Rumours & News
24th Mar 2014, 20:14
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

Inmarsat.

I was one of those who questioned the Inmarsat ping results. The constant 40deg angle running near KL seemed questionable.

Now that the techniques have been validated against multiple aircraft,...
Forum: Rumours & News
23rd Mar 2014, 09:36
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

Paranoia

India and China are two great nations in the same geographic sphere. Tensions are somewhat inevitable, however this is a moment to be human together; to show sadness and compassion and do all that...
Forum: Rumours & News
23rd Mar 2014, 05:11
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

Rubbish spotted in the water.

On land, a crashed aircraft looks like a rubbish dump on a farm. Sadly, there are lots of rubbish dumps. In land searches each search aircraft might further investigate (eg circle) 1-2 candidate...
Forum: Rumours & News
22nd Mar 2014, 22:32
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

There are competing sets of assumptions. :-) ...

There are competing sets of assumptions. :-)

The version of events in the media (lots of height, heading, and speed changes; avoids some radars; and then suddenly to make the data fit a straight...
Forum: Rumours & News
22nd Mar 2014, 12:41
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

Quality of satellite images

Google maps pictures might be updated once a year; this is because it takes that long to get around a photographing every place of interest at high resolution. If you look at google maps images away...
Forum: Rumours & News
22nd Mar 2014, 12:32
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

Air Observers

Airservices Australia trains volunteers they largely source through the SES to be air observers on SAR missions. Commercial aircraft get chartered and the eyeballs come from this pool of trained...
Forum: Rumours & News
22nd Mar 2014, 12:11
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

How satellite pings work.

The low data rate inmarsat services that work with omnidirectional antennas are not as sophisticated as the poster may imply. Inmarsat-C is a teletype era service.
Forum: Rumours & News
22nd Mar 2014, 12:02
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

Inmarsat

For starters, the satellite doesn't discriminate between anything. It's just a bent pipe retransmitting what it hears in an analogue sense. All demodulation and interpretation occurs on earth.
...
Forum: Rumours & News
22nd Mar 2014, 04:47
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

I have seen nothing about the pings that suggests...

I have seen nothing about the pings that suggests motion. I think the accuracy suggested is wildly fanciful.

I wasn't suggesting spoofing. I'm suggesting screw-up. Administratively, one party...
Forum: Rumours & News
22nd Mar 2014, 03:12
Replies: 11,831
Views: 24,370,601
Posted By UnreliableSource

Inmarsat

The simplest explanation is that inmarsat are tracing a terminal not installed on the lost aircraft.

Once ranging errors are allowed for, the likely location of the inmarsat terminal is the...
Showing results 1 to 19 of 19


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.