Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997abos.conf..645c&link_type=abstract
Conference Paper, Astronomical and Biochemical Origins and the Search for Life in the Universe, IAU Colloquium 161, Publisher: B
Astronomy and Astrophysics
Astronomy
Project Seti, Radio Signals, Signal Detection, Astronomical Interferometry, Radio Antennas, Signal Transmission, Matched Filters
Scientific paper
Effective detection of extraterrestrial radio signals requires elimination of terrestrial interference. However, the sensitivity of standard, two-element interferometry depends on the geometric mean of the antenna areas. This is very disadvantageous if the antennas are not the same size. Project Phoenix performs pseudointerferometry by transmitting detailed signal descriptions to its second site where they are used for confirmation. The primary site uses the larger antenna and square-law detectors. Use of matched filtering and a lower threshold makes detection with the second, much smaller, antenna possible. The pseudointerferometer can handle up to 12 signals having bandwidths of order 1 Hz in a 10-MHz band. In Australia, it allowed observing to be completed in less than half the time that would have been required using a single-site system.
Cullers D. K.
Stauduhar Richard P.
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