Jeg faldt over dette interessante interview:
http://www.astroseti.org/danweng.php
"Astroseti : Seti@home doesn't process the signals in real time, but it
makes a deeper search using more complicated algorithms. Does it mean
SERENDIP -or Phoenix- could detect strong signals intentionally sent to
be discovered, while Seti@home could detect accidental transmissions?
Dan Werthimer : Both serendip and seti@home can detect leaking signals
or beacons. We don't know how powerful the signals from other
civilizations might be. My guess is that the first signal we detect from
ET will be not intentionally sent for us."
Jeg var ikke klar over Seti kunne opfange tilfældige transmissioner.
Skal de så ikke ligge omkring 1420Mhz ?
"Astroseti : It has been said for a long time that "I love Lucy" or the
Berlin Olympic Games tv signals are travelling in the space and now a
civilization 60 years-light away could listen, or at least detect, those
signals. Which dish size would they need? What about military or
planetary radars emissions?
Dan Werthimer : To detect TV, they'd need an SKA (see above), or they'd
have to integrate for a long time (look very carefully) with an Arecibo
sized telescope.
Planetary radar transmissions from arecibo could be detected across the
galaxy (that's 100,000 light years, but they haven't gotten that far yet)."
SKA er beskrevet som værende et array af teleskoper der går i drift
til næste år. Det vil sige aliens på samme niveau som os, kan opfange
vores TV-signaler i stor afstand. Igen, det er vel afhængig af hvilken
frekvens der lyttes til. Over hvilket frekvensområde sendes et TV signal
?
Det betyder også at vi til næste år kan opfange Alien TV transmissioner,
tænk hvis det skete, det ville være sindsygt spændende.
"Astroseti : SETI Institute expects to find an ET signal within 25 years
according to the ATA telescope bigger range if there are a reasonable
number of civilizations. What's your bet for the first contact?
Dan Werthimer : 50 to 100 years. We're just getting in the game now, but
capabilities are doubling every year."
Det hænger ikke sammen, med en fordobling hvert år, vil kapaciteten om
50 år være 2^50 større end i dag. Indenfor 25 år virker da mere
sandsynlig.
Martin.