Signature analysis in the Ultra Wide Band


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Profile Clyde C. Phillips, III

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Message 471400 - Posted: 3 Dec 2006, 19:12:02 UTC

I don't know anything about air traffic frequencies but I can guess that almost any contaminating RFI would soil many or all of the 256 workunits collected at a time if it had soiled one workunit because of Seti's narrow bandwidth of even the entire band, 2.5MHz / 1.4GHz (0.18 percent).
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Profile Duke Dailey
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Message 470655 - Posted: 2 Dec 2006, 18:40:31 UTC

I also understand frequency "bleed-over" occurs with airtraffic frequencies on rare occassions. Why does this happen and how often? What is this frequency range crossing with? It looked like Aviaton Navigational aides are on near-by frequencies. 1.38hertz or there abouts.
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Profile Clyde C. Phillips, III

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Message 470612 - Posted: 2 Dec 2006, 17:44:59 UTC

I think we'll examine more frequencies when we get to crunch Alfa data. In order to increase sensitivity it's necessary to study extremely narrow bands. The narrowest band I think we study is only 0.07 hertz wide. The whole workunit is almost 10kHz wide.
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Profile Keck_Komputers
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Message 470466 - Posted: 2 Dec 2006, 12:33:52 UTC

This search is in a very narrow band. Astropulse will examine a wider band when it is released.
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Rob W Vens

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Message 470444 - Posted: 2 Dec 2006, 11:26:18 UTC

Just a qustion really: is the search on radio waves only conducted on the various frequencies, or is there also an analysis over the entire spectrum band? I know that if I would like to broadcast a meaningful signal in a lossfull environment like the universe, I would use broadband.
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Message boards : SETI@home Science : Signature analysis in the Ultra Wide Band


 
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