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Wide-bandwidth high-resolution search for extraterrestrial intelligenceResearch was accomplished during the third year of the grant on: BETA architecture, an FFT array, a feature extractor, the Pentium array and workstation, and a radio astronomy spectrometer. The BETA (this SETI project) system architecture has been evolving generally in the direction of greater robustness against terrestrial interference. The new design adds a powerful state-memory feature, multiple simultaneous thresholds, and the ability to integrate multiple spectra in a flexible state-machine architecture. The FFT array is reported with regards to its hardware verification, array production, and control. The feature extractor is responsible for maintaining a moving baseline, recognizing large spectral peaks, following the progress of previously identified interesting spectral regions, and blocking signals from regions previously identified as containing interference. The Pentium array consists of 21 Pentium-based PC motherboards, each with 16 MByte of RAM and an Ethernet interface. Each motherboard receives and processes the data from a feature extractor/correlator board set, passing on the results of a first analysis to the central Unix workstation (through which each is also booted). The radio astronomy spectrometer is a technological spinoff from SETI work. It is proposed to be a combined spectrometer and power-accumulator, for use at Arecibo Observatory to search for neutral hydrogen emission from condensations of neutral hydrogen at high redshift (z = 5).
Document ID
19950002842
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Horowitz, Paul
(Harvard Univ. Cambridge, MA, United States)
Date Acquired
August 17, 2013
Publication Date
January 15, 1995
Subject Category
Space Biology
Report/Patent Number
NAS 1.26:197973
NASA-CR-197973
Accession Number
95N70962
Funding Number(s)
CONTRACT_GRANT: NAGW-2872
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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