Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997abos.conf..623d&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 Telescopes, Sky Surveys (Astronomy), Signal Detection, Ohio, Real Time Operation, Broadband
Scientific paper
The Ohio State SETI program has been in operation since 1974, making it the longest-running search. The Ohio State radio telescope is equivalent in size to a 175-foot circular dish. The latest and best all-sky meridian-transit survey searching in the Water Hole (1.4 to 1.7 GHz) is about 60 percent complete. Signals detected are automatically examined at greater resolution and then tracked for up to 1 h. A dual-beam pattern-matching system is used for real-time signal detection and RFI rejection. A new 4 million channel receiver built at UC Berkeley is now being installed. A simultaneous broadband continuum survey at 1415 MHz is in progress, searching for natural radio sources that have changed since the previous OSU continuum survey was made 20 years ago. A new radio telescope called Argus is being designed that will look in all directions simultaneously, allow usage by everyone simultaneously, and have no moving or machined parts. It is a large timed array which is based on computers rather than steel. All possible beams are formed all the time, so there is no scanning or need to 'point' the telescope. This approach has many advantages over dish-type telescopes, such as RFI rejection and retroactive observations.
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