archive: Re: Fwd: SETI Re: Is radio the last word?
Re: Fwd: SETI Re: Is radio the last word?
Dr. H. Paul Shuch ( (no email) )
Wed, 03 Feb 1999 09:00:28 -0500
>From: "Dr. Stuart A. Kingsley" <skingsle@postbox.acs.ohio-state.edu>
>
> Guys, let me add a few cents worth.
>
> It was because the uplink assumptions were so poor in the Cyclops Report
>that OSETI has been held back for a quarter of a century.
>
> So in actual fact, the laser approach is far superior Of course, if
>it is easier (for an ETI) to generate very large laser powers, the FOM on a
>non-watt for watt basis might be even higher.
>
> Have a look at my diagrams which indicate a 14 dB improvement of a
>symmetrical 10 meter 656 nm link over a symmetrical 300 meter 1.5 GHz link:
>
> http://www.coseti.org/9006-019.htm
>
> http://www.coseti.org/9006-020.htm
>
> http://www.coseti.org/9006-021.htm
>
>
> Compare these diagrams to http://www.coseti.org/9301-027.htm I used to
>joke that the ETIs in this comparison where using compact disc lasers to
>signal Earth!
>
>
> This way, their efficacy can be compared on a watt for watt basis.
>
>
> Stuart
>
>
> Right Paul?
>
>
>
>
>
> Dr. Stuart A. Kingsley, SMIEEE, MIEE, CEng. Director, The Columbus Optical
>SETI Observatory - http://www.coseti.org
> Optical SETI E-Commerce Site - http://store.yahoo.com/coseti
> SPIE's OSETI III Conference, Photonics West, February 19-21, 2001, San
>Jose Convention Center - http://www.coseti.org/spiepro3.htm
> & Telescope, page 48, for an article Also here -
>http://www.coseti.org/skytel_1.htm
> The Columbus Dispatch, January 31, 1999 -
http://www.coseti.org/dispa_01.htm
> The history of the COSETI Observatory - http://www.coseti.org/history.htm
>
>