 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| . |  |
. |
Ashes Of The Phoenix
Moffett Field - Apr 05, 2004 Project Phoenix has left the building. There are empty spaces at Arecibo Observatory, but not for long. A new computer cluster is destined for the space occupied by fifteen Programmable Detection Modules. The cabinets that stored the spare components for the Phoenix search system are already reassigned to the RFI Monitoring and Electronics groups. For the staff at Arecibo, another SETI project has ended, and life at the observatory goes on. But for us, life is in transition as we wrap up one project and begin another. As we wait in California for our equipment to arrive from Puerto Rico, it is a good time to look back on Project Phoenix. It wasn't "just another" SETI project. Phoenix rose from the ashes of the NASA SETI Program that was terminated by the US Congress in 1993. The SETI Institute secured use of some of the search equipment developed for NASA under a long-term loan agreement and raised private funds to conduct a search. In the following year, Institute scientists and engineers doubled the size of the search system. In February 1995, just one month after the original NASA schedule, Project Phoenix began its targeted search of nearby stars. The origin of Phoenix, while unusual, is not the reason it was unlike any other SETI project. Phoenix observed hundreds of stars over billions of frequency channels, with high sensitivity, and real-time signal detection and verification. No other search can compare on any aspect. A few searches have looked at some nearby stars in specific frequency bands. Phoenix observed more than 700 stars, using some of the world's largest telescopes, over all available frequencies between 1200 and 3000 Mhz with channels only 0.7 Hz wide. A few searches have used large telescopes, but they typically scan the sky and are limited to a single frequency band. Most of the time, these searches do not observe stars in our galaxy, but are actually looking at stars millions of light years away. In the fraction of time they observe stars in the Milky Way, they only spend 10 to 20 seconds per star. Phoenix only observed nearby stars in our galaxy and so could devote from 100 to 550 seconds per star per frequency band. Almost all previous searches have one thing in common, unresolved signals. When you search for communication signals from interstellar distances, you will certainly detect signals from the Earth and its satellites. Phoenix perfected the real-time processing and verification techniques pioneered by Paul Horowitz of Harvard University. In a two-stage pipeline, Phoenix collected data and detected signals. Any signals not in a database of recent terrestrial interference were subjected to a type of observation unique to Phoenix. Using a second telescope, the star would be re-observed at the frequency of the candidate ET signal. The rotation of the Earth produces a distinct and different Doppler shift at the two telescopes. This technique, called pseudo-interferometry, would rule out signals not coming from the direction of the star. With this process and other tests, Project Phoenix has no unresolved signals. So after nine-plus years of bringing a complex system of electronics to Australia, West Virginia, Georgia, England and Puerto Rico, Project Phoenix is over. We observed more than a million star-MHz, processed millions of signals, but found no evidence of another technological civilization in our galactic neighborhood. Only one task remains, to write the papers for the scientific journals. In the process of writing those reports, we also gather the "lessons learned," an important part of preparing for the next search. Years from now, Phoenix will be seen as humanity's first systematic survey of the nearby stars. It was a major advance over all other SETI programs, but its superlatives will not last. New, more powerful searches will be made in the coming decades that will make the sensitivity, number of stars and frequency coverage of Phoenix seem small in comparison. But, it will always be our first big step in exploring our part of the Milky Way. Related Links SpaceDaily Search SpaceDaily Subscribe To SpaceDaily Express 
Microsoft Billionaire SETI $13.5 Million To Listen Longer
Mountain View - Mar 22, 2004Investor and philanthropist Paul G. Allen has committed $13.5 million to support the construction of the first and second phases of the Allen Telescope Array (the ATA-32 and ATA-206), the world's newest multiple use radio telescope array. The ATA will eventually consist of 350 - 6.1-meter dishes (ATA-350), when construction is completed late in the decade.
|
|
| |||||||||
| The content herein, unless otherwise known to be public domain, are Copyright 1995-2016 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service. |
