Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xray.sai.msu.ru/~polar/html/publications/pop/serendip/seti_serendip Дата изменения: Fri Jan 5 15:29:18 2001 Дата индексирования: Sat Dec 22 05:25:21 2007 Кодировка:

http://seti.ssl.berkeley.edu/serendip/serendip.html


What is SERENDIP IV?

SERENDIP IV, the latest SERENDIP instrument, consists of 40 spectrum
analyzer boards working in parallel to look at 168 million narrow (0.6Hz)
channels every 1.7 seconds. It is essentially a 200
billion-instructions-per-second supercomputer. We installed SERENDIP IV at
the Arecibo
Observatory on June 11, 1997, and have been since receiving raw data from
the observatory at the rate of one megabyte every four minutes.

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History of SERENDIP


SERENDIP has been in operation for 19 years, beginning with SERENDIP I in
1979. The SERENDIP I instrument consisted of a 100-channel
spectrum analyzer which was located at UC Berkeley's Hat Creek Observatory.

Since that time, SERENDIP has undergone a series of sequential improvements.
SERENDIP II, which ran from 1986 to 1988, was thousands of times
more powerful than its predecessor. The second-generation instrument was
able to observe 65,000 channels per second and was primarily located at
the 300-foot NRAO radio telescope at Green Bank and to a lesser extent on
four other high-quality telescopes around the world.

SERENDIP III began operations at Arecibo in April 15, 1992. The end of its 4
year survey coincided with the beginning of a major upgrade at Arecibo.
The upgrade is now complete, and SERENDIP IV was installed at Arecibo in
June 1997