archiv~1: Re: SETI Arecibo message to m13

Re: SETI Arecibo message to m13

Brian Wong ( (no email) )
Thu, 5 Nov 1998 00:11:23 -0800

David,

-----Original Message-----
From: David Woolley <david@djwhome.demon.co.uk>
To: aburto@cts.com <aburto@cts.com>
Cc: jerbidoc@zianet.com <jerbidoc@zianet.com> seti@sni.net <seti@sni.net>
Date: Wednesday, November 04, 1998 11:51 PM
Subject: Re: SETI Arecibo message to m13

>Even if large total powers were used, even todays technology would
>tend to either spread the spectrum or use large numbers of channels.
>Argus detection strategies depend on all the power being in one channel,
>and I suspect, even Chip's theories require a lot more structure
>in the signal than would result from commercial optimisation of the
>interplanetary links.

This is interesting. Perhaps we should be looking for wide-band noise in
microwave SETI? In that case the SARA radio astronomers may find a hit
before we do. Is it possible to distinguish between artificial noise
(spread spectrum) signal and natural noise? Or are their spectrums
indistinguishable?