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Another major SETI project is called Project
PHOENIX, led by the privately funded SETI Institute. This is a targeted search whose aim is to observe over 1000 of the
nearest Sun-like star systems and has scheduled time on the Arecibo Radio Telescope
(Puerto Rico, USA) for around 40 nights each year, spread over 5
years. In contrast to SERENDIP, the analysis is
carried out in real time and uses a second telescope to provide an
immediate rejection of man-made signals. This second telescope does
not need to be quite so large as Arecibo, but should not be
significantly smaller, and at present the University of Manchester's
76-metre Lovell
Telescope is being used. The Arecibo Telescope uses a 56-million channel receiver to
make initial signal detections. Information about those signals which
are not in the data bank of known terrestrial signals are passed to
two further sets of identical receivers at Arecibo and Jodrell Bank.
Due to the rotation of the Earth, and the great distance separating
the telescopes, a signal from outside the Solar System will have
precisely calculable differences when observed at the two
observatories. This allows an extraterrestrial signal, should one be
found, to be distinguished from those originating on, or near, the
Earth. Observations, which began in September 1998, did not get off to a
very auspicious start when, just 10 days into the observations,
hurricane George swept through the Caribbean and damaged the Arecibo
Telescope curtailing that observing session. Happily though, the damage was not too serious and since then
observations have run smoothly but there has, as yet, been no call
from ET. |
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Life in the Universe
SETI - The Search For Extraterrestrial Intelligence
The Search For Extraterrestrial Intelligence
SERENDIP
PHOENIX
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Last updated August 1, 2001