To See the Unseen: A History of Planetary Radar AstronomyNational Aeronautics and Space Administration, 1996 - 301 páginas |
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Términos y frases comunes
antenna Arecibo Observatory asteroid astronomical unit Big Science CAMROC Center Comet Cornell craters CRSR December Deep Space Network detection dish Don Campbell Doppler Earth Electronics engineering ephemeris Eshleman Evans facility funding Galilean moons geology Goldstone radar Gordon Pettengill ground-based Hagfors Icarus inferior conjunction instrument ionospheric ionospheric research Irwin Shapiro January Jodrell Bank June Jurgens Lincoln Laboratory Lovell lunar radar Magellan Mars Station Memorandum Mercury meteor mission MITA Moon Muhleman NAIC NAIC QR NASA National Science NEROC October optical orbit Pioneer Venus planet planetary radar astronomy polarization proposed radar data radar echoes radar experiment radar images Radar Observations radar research radar studies radar waves radio and radar range-Doppler mapping Renzetti Report resolution rotation S-band Saturn scientific scientists September 1993 Shapiro signal Slade Soviet Space Science spacecraft Stanford surface target techniques Technology telescope transmitter Tyler University upgrade Venus radar Viking VOIR
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Página 232 - Observatory is part of the National Astronomy and Ionosphere Center, which is operated by Cornell University under contract with the National Science Foundation.
Página 3 - It seems to me that it should be possible to design apparatus by means of which a ship could radiate or project a divergent beam of these rays in any desired direction, which rays, if coming across a metallic object, such as another steamer or ship, would be reflected back to a receiver screened from the local transmitter on the sending ship, and thereby immediately reveal the presence and bearing of the other ship in fog or thick weather.
Página 18 - Center and modified by the Radio and Electrical Engineering Division of the National Research Council.
Página 78 - None of the funds authorized to be appropriated by this Act may be made available for the provision of assistance to El Salvador...
Página 295 - Technology, sponsored by the History of Science Society, the Society for the History of Technology, the...
Página 29 - Kompfner recognized that the perfection of the maser (an acronym for microwave amplification by stimulated emission of radiation) would reduce the power levels needed for the successful transmission of audible radio waves.