A SETI spoofing expriment I would like to see: MT63 via EME

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Message 5201 - Posted: 26 May 2006, 23:09:13 UTC

A SETI Spoofing expriment I would like to see...

MT63 via EME

MT63, when the audio is transmitted using AM modulation -- you get those nice pulses that SETI likes to search for.

All that is required is
* a microwave band AM transmitter, frequency agile
* transmitter power of ~5 Watts
* and a transmitting dish (like used for C band TVRO)
* dish gain of about 9db (dbi?) isotropic
* Airecebo's search path (so the system only turns on when the dish's search region approaches [covers] the moon.

The transmitter hopefully should randomly flip around the SETI search band using a 1d random walk.

Using the lowest level of error correction, and a very low complexity outgong message -- short enough to fit into a single work unit.

All of this coupled with the 309db path loss should just about be enough to trigger SETI's alarm bells.
-- The moon is only 12% reflective in the Microwave range.

SETI does not seem to have any built in signal classification code.

It should be able to spot MT63 outright as a EMI signal, and show EMI suspicion with respect to several forms of PSK, QPSK etc...

Many signal types (used on earth) would not be at all useful for galatic communications due to behaving badly due to doppler effects. (High) Doppler immunity is very important beyond 1 AU.

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Message boards : Cafe SETI : A SETI spoofing expriment I would like to see: MT63 via EME


 
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