>From: "Bill St.Arnaud" <bill.st.arnaud@canarie.ca>
>Reply-To: <bill.st.arnaud@canarie.ca>
>Subject: Transmission: The Other Side of SETI
>Date: Tue, 12 Jul 2005 11:04:01 -0400
>
>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
>
>