From: Bill St.Arnaud (bill.st.arnaud_at_canarie.ca)
Date: Tue Jul 12 2005 - 15:04:01 UTC
David:
I enjoyed your paper.
However I think there is one other category of ET transmission that is not
described in your paper: archeological transmission for the benefit of
future generations of the transmitter's society i.e. electronic time capsule
The purpose of these transmissions is not to contact intelligent
civilizations on other planets but to leave an electronic time capsule for
future generations of the transmitter's society on their own planet.
Reflected radar beams off distant exo-planets, gravitational lensing,
inter-stellar refraction and other techniques could be used so that a signal
sent from earth would some day return back to earth and be detected by
future generations.
The signal would be extremely weak - but knowing its characteristics should
make it easier detect for future technologically advanced societies.
If other ET civilizations have the same anthromorphic desire "to leave their
mark" then their would be a rationale for these societies to go to the
expense to carry out inter-stellar transmissions for many generations. It
is the same desire that we have had over many millennia to build pyramids,
castles and tombstones
Bill
> -----Original Message-----
> From: owner-public_at_setileague.org [mailto:owner-public_at_setileague.org] On
> Behalf Of LARRY KLAES
> Sent: Sunday, July 10, 2005 11:57 AM
> To: setipublic
> Cc: BioAstro
> Subject: SETI public: Transmission: The Other Side of SETI
>
> Transmission: The Other Side of SETI
>
> David F. Mayer, Advanced Computer Consultants, Columbus, OH
>
> Abstract: The thesis of this paper is that the best way to answer the
> question of how to search for extraterrestrial intelligence is to look at
> SETI from the perspective of the civilization which is attempting to
> TRANSMIT to another. It is concluded that the visible band presents the
> most
> viable medium of contact, since it offers both the greatest bandwidth and
> the most narrow focusing, permitting the most information to be
> transmitted
> to potential targets at the lowest cost. The essential problem of defining
> the meaning of a message to an unknown civilization is solved by the
> concept
> of the SELF-DECODING MESSAGE. The problem of the selection of potential
> targets is discussed and criteria for optimal choice are given. Finally,
> the
> essential question of the PRUDENCE of such a transmission program is
> presented and discussed.
>
> My central point is not bandwidth but easy acquisition and decoding by a
> naive receiver.
>
> http://home.earthlink.net/~motustuff/Seti_Transmission/TRANSMIT0.htm
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