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"This way, with one array we can search space in a much more effective way" - for what, exactly? Aliens with very large transistor radios? |
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Building it in space would be a big waste of time too. Dish antennas spread across several continents can already be joined up to create 'virtual antennas' several thousand miles across. The same principle could be used to create big transmitters. |
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//the longest antanae is about a mile or so long// It’s about 125 miles long. |
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//The radio "message" itself would be short// It would be slow, not necessarily short. |
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//but would repeat itself so that its wavelength is 100 miles long// Yer joking, right? |
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As you increase the wavelength you
decrease the scatter of a radio wave. So
an ultra-long wavelength radio might
be good for intergalactic
communication.
(an ULW radio-telescope is mentioned
in a book I half-remember. May have
been Asimov. The
plotline is about a martian settler going
to earth to clone the next generation of
his sterile body. Can't remember the
title, though.) |
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Unfortunately, as the
wavelength increases, so the frequency
decreases, and with it the amount of
information the wave can carry.
I'm guessing that your message will
have to be significantly longer than a
wavelength otherwise, all you are
transmitting is,
"hmmmmmmmmmmmmmmmmm..."
Hardly an exciting message. |
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As this collection of thoughts tend to indicate. |
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The point is that super long radio waves would pass through spacial bodies and systems, thus a good search pattern could be laid out. |
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Test match cricket on 198 (Hz) perhaps? |
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In space, no-one can hear you "Hmmmmmmmmmm" |
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i guess the idea is that ... long waves are good for
seeing 'through' things - like the earth, but the
problem with space - is Not That anythings
particularily _in the way_ ... more that the speed
of light is such a limiting factor. So long-wave
radio is good for long-distance earth
communication - but has no advantage i can see
over shorter wavelengths in space. As an asside -
technology moves So Fast - and we are looking for
aliens at exactly our technological match - when
we find them... it will be funny. |
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It was Arthur C Clarke. The title is Imperial Earth. The
main character is a resident of Titan. |
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what "message" could be of any merit? |
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I'm always looking for new recipes, like how to use
leftover turkey, or variations on tuna casserole.
Perhaps alien civilizations would have some fresh
new culinary ideas. |
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Or maybe they would like my recipe for fish sticks
with custard. |
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