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cookiejar
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Sensor?
cookiejar   11/15/2013 3:32:43 PM
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I was a little confused and frustrated by the article's mention of satellites and some kind of on board sensor.

I guess I was expecting some technical information, this being a technical website.

I did get my information in the link however:


"The idea involves mounting two infrared cameras somewhere on a plane. The cameras snap pictures – about 25 images per second – as the plane goes along.

Because ash looks different under infrared than water droplets or ice, it's not hard to distinguish it.

 Computer systems can take the data and quickly determine the "ash dosage"ť a plane is likely to get."

 

David Ashton
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Re: Volcanic Ash
David Ashton   11/14/2013 3:08:56 PM
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Hi Carolyn.  "This sensor should be worth loads to the industry"


And to the guy who invented it - if he plays his cards right, he should be able to retire comfortably.

I had a quick fossick on the web - there are bits of the ACI episode on You tube, but not the full one.  It would have been scary stuff for both the crew and the passengers.

 

CMathas
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Re: Volcanic Ash
CMathas   11/14/2013 2:21:19 PM
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David,

 

Thanks! I thought I remembered that, but thought it was Mt. St. Helens. Thanks!!


This sensor should be worth loads to the industry -

 

Carolyn

David Ashton
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Volcanic Ash
David Ashton   11/14/2013 2:15:52 PM
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Carolyn, I'm surprised you did not mention British Airways flight 9 - which was in 1982.  They flew into a cloud of volcanic ash and had all 4 engines fail.  Here's some more:

http://en.wikipedia.org/wiki/British_Airways_Flight_9

 

There was also an episode of the TV series Air Crash Investigations which covered this flight - although it did not crash thanks to the expertise of the pilots involved.  It's well worth a watch.   I don't know if it's available on the net though.



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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