NTRS - NASA Technical Reports Server

Back to Results
SETI - A preliminary search for narrowband signals at microwave frequenciesIn the search for intelligent signals of extraterrestrial origin, certain forms of signals merit immediate and special attention. Extremely narrowband signals of spectral width similar to our own television transmissions are most favored energetically and least likely to be confused with natural celestial emission. A search of selected stars has been initiated using observational and data processing techniques optimized for the detection of such signals. These techniques allow simultaneous observation of 10 to the 5th to 10 to the 6th channels within the observed spectral range. About two hundred nearby (within 80 LY) solar type stars have been observed at frequencies near the main microwave transitions of the hydroxyl radical. In addition, several molecular (hydroxyl) masers and other non-thermal sources have been observed in this way in order to uncover any possible fine spectral structure of natural origin and to investigate the potential of such an instrument for radioastronomy.
Document ID
Document Type
Conference Paper
Cuzzi, J. N.
(NASA Ames Research Center Moffett Field; California, University, Berkeley, Calif., United States)
Clark, T. A.
(NASA Goddard Space Flight Center Greenbelt, Md., United States)
Tarter, J. C.
(NASA Ames Research Center Moffett Field, CA, United States)
Black, D. C.
(NASA Ames Research Center Moffett Field, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
June 1, 1977
Subject Category
Space Sciences (General)
Meeting Information
Plenary Meeting(Tel Aviv)
Distribution Limits
No Preview Available