NASA Technical PaperNational Aeronautics and Space Administration, Scientific and Technical Information Office, 1984 |
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Términos y frases comunes
achieve algorithms all-sky Ames Research Center amplitude antenna appendix Arecibo Arecibo Observatory assumed astrophysical average band bandpass filter bandwidth beam binwidth channel civilizations coherence CW signal DFT Processor equation ETI signal Extraterrestrial Intelligence factor feeds Figure FIR filter frequency coverage frequency range function galactic plane galaxy hardware input integration Interstellar Communication isotropic antenna MCSA microwave window mode MODULE narrowband NASA noise power Observatory operation output parameters phase polarization possible Project Cyclops Project Ozma prototype pulsar PULSE DETECTION quantizer quency radiation radio astronomical radio telescopes receiver samples scientific Search for Extraterrestrial sensitivity SETI COMPUTER SETI instrumentation SETI observations SETI program SETI Program Office SETI system sky survey sources space spectral resolution spectrum analyzer square law detector SSWG strategy targeted search threshold tion transmitting University W/m² wavelengths
Pasajes populares
Página 109 - But we are unanimous in our conviction that the only significant test of the existence of extraterrestrial intelligence is an experimental one. No a priori arguments on this subject can be compelling or should be used as a substitute for an observational program. We urge the organization of a coordinated, worldwide and systematic search for extraterrestrial intelligence.
Página 108 - None of this is meant to discourage further ingenious or even speculative - use of climatic models on cosmic questions. But we conclude that cosmic conclusions from climatic models should be accompanied by clear admission of the vast uncertainties in the climatic component of the argument, let alone other parts of the problem.
Página 108 - Society (JBIS) , and the twice-yearly Space Education. For those wishing to keep abreast of space activities, Spaceflight (first issued 1956) provides essei be found in any other publication.
Página 103 - Why explore the Universe? It is almost ironic that we should have to ask this question because it is almost as though we have to apologize for our highest attributes...we went to Mars, not because of our technology, but because of our imagination.
Página 101 - ... transient phenomena, and coronal evolution. 6. A series of cosmic-ray experiments in space, to promote the study of solar and stellar activity, the interstellar medium, the origin of the elements, and violent solar and cosmic processes.
Página 104 - Center and the Jet Propulsion Laboratory of the California Institute of Technology.
Página 104 - Br. Interplanet. Soc. Journal of the British Interplanetary Society. The British Interplanetary Society, 27/29 South Lambeth Road, London SW8 1SZ (UK). Monthly. ISSN 0007-084X. JBISAW .1.
Página 101 - A meeting to explore prospects for research into the nature and distribution of life in the Universe.
Página 104 - Where Are They? A Symposium on the Implications of Our Failure to Observe Extraterrestrials.
Página 104 - ... who have interests in space. JBIS holds a unique place in the history of space exploration. It was first issued in 1934 and is now a leading international publication in its field, well recognised for its emphasis on key topics. Many of today's developments were originated in its earlier pages. Each issue is now devoted to one of five main subject areas, viz. Space Technology, Space Applications, Astronautics History, Space & Education and Interstellar Studies.