Interesting pattern...

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Evey Vendetta
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Message 178672 - Posted: 15 Oct 2005, 23:41:14 UTC

http://img.photobucket.com/albums/v177/enigmatic_girl/interesting.jpg

http://img.photobucket.com/albums/v177/enigmatic_girl/interesting2.jpg

It doesn't look like a test wow signal...anyone knows what it is?
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Message 179103 - Posted: 16 Oct 2005, 23:49:34 UTC - in response to Message 178672.  

Anyone...?
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Message 179138 - Posted: 17 Oct 2005, 1:47:24 UTC - in response to Message 179103.  

Anyone...?


Hi.

Since noone else chimed in, I'm guessing :o)

What you have marked red looks like a spectral line to me.
Things like this are caused by gas clouds that absorb parts of the spectrum of
any background radiation that passes through them.

This spectral line would have no relation to the gaussian you found, though...

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Message 179148 - Posted: 17 Oct 2005, 2:29:57 UTC

I was hoping someone that really knew would chime in. I have seen this before and it was explained as some kind of terrestial interference, but I forget the details. I think it was some kind of non-radiating body passing through the beam.
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Message 179150 - Posted: 17 Oct 2005, 2:31:02 UTC

The images you posted are interesting indeed except for the area in which the search was conducted. (check that 1.4200000000) That, according to SETI, is the line where you will get a cascading pattern not unlike the one you have posted. Odds are pretty good that it's a test WU that was sent to you. I've gotten that one too a while ago and I know the feeling of "oh my god!" that you get initially. Keep crunching, though, and if you get the same thing and at a different part of the spectrum, let us know!

Keep crunching!
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Message 179280 - Posted: 17 Oct 2005, 15:49:06 UTC - in response to Message 178672.  
Last modified: 17 Oct 2005, 15:49:38 UTC

http://img.photobucket.com/albums/v177/enigmatic_girl/interesting.jpg

... It doesn't look like a test wow signal...anyone knows what it is?

Its a well known artifact in the way the data is generated.

It's the common mixing trough centred on exactly 1.420... GHz. I'll let others explain further ;-)

Keep searchin',

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Martin
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Message 179298 - Posted: 17 Oct 2005, 16:54:13 UTC
Last modified: 17 Oct 2005, 16:54:26 UTC

this might be of some help here.
"By faith we understand that the universe was formed at God's command, so that what is seen was not made out of what was visible". Hebrews 11.3

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Message 181114 - Posted: 22 Oct 2005, 15:57:34 UTC - in response to Message 179298.  

this might be of some help here.

That is no help whatsoever and is completely off-base!

There must be a link out there somewhere where the s@h data analysis trough is explained.

Keep searchin',
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Message 181128 - Posted: 22 Oct 2005, 16:48:46 UTC - in response to Message 181114.  
Last modified: 22 Oct 2005, 16:49:22 UTC

this might be of some help here.

That is no help whatsoever and is completely off-base!

There must be a link out there somewhere where the s@h data analysis trough is explained.

Keep searchin',
Martin


The graph he/she has circled is a WU of 1.420 GHz.
1.420 GHz = The Freq. Spectrum as allocated by the FCC
= radio astronomy 1.420 ghz
= hydrogen maser resonators 1.420 ghz
Source

or
1.420 = Detection ranges (LY) for a 12 foot diameter amateur
radio telescope SETI system, operating at 1.420 GHz.
Source

or

1.420 = The Hydrogen Line

As for the gaussian I do not know what that is. it could Be anything from noise to a Pulsar or anything. But they were both returned nonetheless. We just have to wait if Berkley says anything :)
"By faith we understand that the universe was formed at God's command, so that what is seen was not made out of what was visible". Hebrews 11.3

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Message 181255 - Posted: 23 Oct 2005, 0:15:24 UTC - in response to Message 181128.  
Last modified: 23 Oct 2005, 0:16:11 UTC

... There must be a link out there somewhere where the s@h data analysis trough is explained.

The graph he/she has circled is a WU of 1.420 GHz. ...

OK, the original threads on the seti-classic forums have been long lost in the periodic scrambling and restarts for those forums. A text snippet is:

>>> David Woolley on May 14, 2003 at 05:07
Valleys that appear as downward diagonals on the extreme left or right edge on
sub-band 0 or 255 are artefacts of the processing system. It takes data
1.25MHz either side of a centre frequency, but cannot handle the exact centre
frequency, so that apppears quiet. The line becomes diagonal as a result of
the de-chirping shifting the frequencies by an amount that varies across the
work unit duration.

They will have a slope that equals the chirp rate.

>>>

Hope that explains a bit more.

Keep searchin',
Martin
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