Nothing But the Facts about SETI - The Search for Extra-Terrestrial Intelligence

The figure on the left is the telescope used in the META II project described in the next section. The image on the right shows an amateur set up for SETI signals analysis.

1. Full Form: Search for Extra Terrestrial Intelligence
2. Target: To find out about the existance of intelligent life anywhere in the universe
3. Medium of Search: Trying to find signals which have artificial origin from outer space
4. Underlying Principle of Possible Communication with Aliens: Dependence on Mathematics for communication
5. Is There a Single Organisation by the Name SETI: No. Rather, it refers to the worldwide efforts carried out by different

   independent group of scientists and enthusiasts

6. Typical Research Time by a Non Dedicated Radio Telescope: 5% of the entire project time
7. SETI Listenining Window: Microwave Spectrum
8. Range: 1 to 10 GHz
9. Total Channels in this Range: 9 Billion
10. Current Signal Processing Limitations: 100 millions channels at a time
11. Observations Required for each Sky Position: 90
12. Water Hole: A section of the radio spectrum between - 1420 (21 centimeter line) MHz to 1662 MHz
13. Why this Range of Water Hole: Corresponds to Radio Frequencies emitted by Hydrogen and Hydroxyl Ions
14. Significance of Water Hole: Any civilization worth its salt would know about the hydrogen and hydroxyl lines which lie in a very quite part of the spectrum and form the signposts for a natural interstellar communication, hence searching near the water hole greatly increases the chances of finding an alien species - [provided they think along the same lines as we do!]
15. SETI@home: A project where ordinary users combine their computer power to process data for analysing results of signals. Based in Berkeley in California and the telescope used is the Arecibo radio telescope in Puerto Rico
16. Project BETA: A project that utilizes the 84-foot radio telescope at the Oak Ridge Observatory in Massachusetts for SETI signals
17. Project SERENDIP: Based in Berkeley in California, this project uses a receiver attached to the Arecibo radio telescope in Puerto Rico and its main purpose is to find signals from nearby civilizations if they are advanced enough to send such signals
18. Optical SETI: combined name for two projects based in Harvard and two in Berkeley aimed to detect optical signals from alien civilisations.
19. Project META: Acronym for Megachannel Extraterrestrial Assay and refers to a past project which ran for nearly one decade from 1985 to 1994 covering most of the northern hemisphere sky of -30 to +60 declination using drift scan mode
20. Project META II: Megachannel Extraterrestrial Assay (META II) can be said to be the sister project of META and is located near Buenos Aires at the Argentina Institute of Radio Astronomy and is aimed to detect any intelligent signals in the southern hemispherical sky
21. Findings Till Date: Until now no conclusive evidence has been found in favour of the presence of any aliens in the universe but the search continues in the hope that we are not alone in this gigantic universe

Images

META II Telescope: http://tdc-www.harvard.edu/oakridge/oakridge/meta.gif

Amateur SETI Analysis Setup: http://www.setv.org/jpgs/seti-fox-system.jpg

Facts

http://www.seti.org/Page.aspx?pid=211

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