Subject: Re: Wow! Signal and Arecibo Shout
From: david@djwhome.demon.co.uk (David Woolley)
Date: 22/09/2004, 07:55
Newsgroups: alt.sci.seti

In article <d931dc4e.0409211554.7d49372@posting.google.com>,
rcraiggeorge@gmail.com (Craig) wrote:

   In a nutshell, the question is: Could the Wow! Signal be a
reflection of the Arecibo Shout?

No. The Arecibo radar tansmitter is at around 2.3GHz, whereas the 
receiver that detected the Wow! signal was at 1.42GHz.
 
the Oort Cloud. Remember that the Arecibo Shout was intended to be
detectable in M13, 

Not really.  It was a more or less arbitrary direction.  It was't
even corrected for proper motion.

                   and hence a reflection from inside our own solar

The strength of the signal was determined by the primary purpose of the
transmitter, which is planetary radar, i.e. getting reflections from
within the solar system.  Even the modern version of that radar is very
much at its limits at Jupiter, so, especially as radar signal returns
fall off as the fourth power of distance.   It's limit is 10s of light
minutes not well over a light year.

The sensitivity of the Wow! receiver was less than that of modern
backyard amateur SETI systems because it was a single channel receiver
with a bandwidth of about 10kHz.

Even if the frequency had been right, which it was not, you would need
a corner reflector of planetary size or bigger to produce a good
return.  It would have to be flat to a few centimetres!