archiv~1: Re: SETI Arecibo message to m13

Re: SETI Arecibo message to m13

Noel Welstead ( (no email) )
Fri, 06 Nov 1998 00:19:54 +1000

Dear Alfred,
The 3 minute transmission was to breif a time for it to be detected. If it was
it would become
someone elses WOW signal that never repeated. What a shame. We here on the Earth

have sent signals that could arrise into folklore of Aliens that are also
looking for aliens.??
Noel C. Welstead.

Alfred A. Aburto Jr. wrote:

> Yes, 3 minutes was it. I checked in Frank Drake & Dava Sobel's
> book: "Is Anyone Out There?", pagae 181 (available from the SETI
> Institute gift shop).
> The probability of detecting that one signal is extremely low.
> If it were detected it would, all by it self, be interesting
> because it would be a strange and complex signal (message really)
> which would arouse the interest (hopefully) of any intelligent
> reasoning entity.
> One reason I like the SETI Institute approach is that they are
> searching individual stars within 200 LY of Earth looking for
> deliberate or 'leakage' signals. That is exactly what they should
> do with the high sensitivity intruments (Arecibo and other big
> radio telescopes, also optical telescopes too (a new addition to
> their search strategy)). Their problem is that they look for only
> a few hours at a time --- periodically they will need to revisit
> those stars to see if anything has changed ...
> Al Aburto
> > David Woolley wrote:
> >
> > > need to be looking at the right time (!), the right 3
> > > minutes in a time span covering, say, several billion
> >
> > If it really only was a 3 minute transmission:
> >
> > - it would not be verified by current peer review processes if detected
> > on earth;
> >
> > - in one sense, the communicating lifetime of the human civilisation might
> > only be 3 minutes, which rather reduces the Drake equation score - of
> > course this doesn't allow for leakage signals.