IP: Discover Alien Life With Your PC And SETI
From: Richard Sampson <rjsa@sprintmail.com> Subject: IP: Discover Alien Life With Your PC And SETI Date: Fri, 06 Nov 1998 08:09:03 -0500 To: "ignition-point@majordomo.pobox.com" <ignition-point@majordomo.pobox.com> ****Discover Alien Life With Your PC And SETI TOKYO, JAPAN, 1998 NOV 5 (Newsbytes) -- By Martyn Williams, Newsbytes. The SETI@home project, which hopes to harness the idle processing power of thousands of desktop personal computers to help in the search for intelligent life in the universe, is back on track with an April 1999 launch date. The project was launched in mid 1997 and was scheduled to begin operations early this year (Newsbytes, August 18, 1997) but the launch was delayed after funding problems slowed research and development work. Now, with new funding and hardware donated by Sun Microsystems, the project is back on track. Hoping to attract the millions of computer users that believe in the existence of intelligent life in space, the project will be based around a special screensaver. Like any screensaver, the software kicks in when you aren't using your PC but unlike other software, the SETI@home application won't present you with a banal selection of flying windows of swimming fish. Instead, it will be doing something much more useful: analyzing radio frequency spectrum data captured by the Arecibo radio telescope in Puerto Rico. The analysis is searching for a signal out of all the noise from space - a signal that may reveal the existence of intelligent life. The project team estimates that once 50,000 PCs are enrolled in the project, the SETI@home program will rival other similar SETI (search for extraterrestrial intelligence) programs that are looking for signals from space and may turn up signals that would otherwise be missed. The program works like this: data is collected from SERENDIP, a SETI project based at UC Berkeley, on magnetic tape and transferred to SETI@home servers. This data is then distributed to participating PC users as they log onto the Internet and the data is analyzed on their PCs. Once finished, the results are returned to the project servers via the Internet. First tests of the system, with 100 volunteers, has just begun and the project hopes to make available the first generation SETI@home screensavers in April 1999. These will be available for Windows, Apple and Unix based platforms. What's in it for the user? Apart from helping science, the team says, "There's a small but captivating possibility that your computer will detect the faint murmur of a civilization beyond Earth." For more information on the project, how to offer your spare computer capacity and how to donate money, check the SETI@home Web page at http://setiathome.ssl.berkeley.edu . Numerous foreign language versions of the page are also available. Reported By Newsbytes News Network, http://www.newsbytes.com -0- (19981105/WIRES ONLINE/) News provided by COMTEX. [!BUSINESS] [!HIGHTECH] [!INFOTECH] [!PUBLIC+COMPANIES] [!WALL+STREET] [COMPUTER] [HARDWARE] [INTERNET] [JAPAN] [MONEY] [NBY] [NEWS] [NEWSGRID] [PUERTO+RICO] [RADIO] [RESEARCH] [SCIENCE] [SOFTWARE] [TOKYO] -- ----------------------- NOTE: In accordance with Title 17 U.S.C. section 107, this material is distributed without profit or payment to those who have expressed a prior interest in receiving this information for non-profit research and educational purposes only. For more information go to: http://www.law.cornell.edu/uscode/17/107.shtml ----------------------- **************************************************** To subscribe or unsubscribe, email: majordomo@majordomo.pobox.com with the message: (un)subscribe ignition-point email@address or (un)subscribe ignition-point-digest email@address **************************************************** www.telepath.com/believer ****************************************************
Perhaps I'm missing something, but it seems to me that if I were an alien civilization and wanted to send out a beacon, in as wide an angle as possible, across the vast reaches of space and overcome as much of the path losses as possible using the least energy I certainly wouldn't use a narrow band signal. Quite the contrary, I'd want to spread a low bandwidth information signal across the widest practical spectrum. Its much easier to increase process gain (the ratio of the baseband information signal to the final carrier bandwidth) than transmit power. While a narrow band signal from Arecibo's powerful transmitter/antenna combination can be detected at a distance of about 300 light years. It subtends a very small angle greatly reducing the likelyhood of contact. Switching to a spread spectrum approach could allow broadening the antenna pattern, and thereby its chances of detection, significantly without reducing its effective range. Notice how 63 dB (or over 2,000,000 fold effective increase in transmit power) of process gain enables handheld GPS receivers to pull in signals from satellites, sent using only a few watts of transmit power, without much of an antenna. If all this seems to make sense, then why are the SETI people apparently seaching the skies with lots of narrow band receivers? They don't seem to be employing any broadband correlator techniques, so spread signals will probably be missed. --Steve
participants (2)
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Steve Schear
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Vladimir Z. Nuri