Future Space Programs 1975: A Compilation of Papers, المجلد 2U.S. Government Printing Office, 1975 - 983 من الصفحات |
عبارات ومصطلحات مألوفة
activities American antenna Apollo areas Astronautical Astronomy Astropolis atmosphere base beam benefits Bibliography of Interstellar British Interplanetary Society capability Carl Sagan Center Committee Congress cost Cyril Ponnamperuma Don Fuqua Earth economic effective electric energy engineering environment environmental exoindustrial exploration Extraterrestrial facilities fusion future space programs geosynchronous orbit global goals human important Interplanetary Interstellar Communication Interstellar Travel investment Kantrowitz KM² LANDSAT laser launch light LUNAR INDUSTRIAL Lunetta materials microwave missions monitoring moon NASA national space program nuclear operational orbit payload planetary planets possible potential probe problems processing production projects propulsion system radiation Relativistic Rocket Rocket satellite scientific scientists Skylab Society solar cells solar system Soletta space program Space Science space shuttle Space Station spacecraft Spaceflight SSPS stars stellar Subcommittee surface techniques telescopes terrestrial tion transmission transportation University users utilization vehicle velocity York
مقاطع مشهورة
الصفحة 533 - This is a cooperative project with the National Aeronautics and Space Administration (NASA) and the National Oceanic and Atmospheric Administration (NOAA).
الصفحة 438 - Committees of the National Academy of Sciences, the American Association for the Advancement of Science, the New York Academy of Sciences, the American Institute of Aeronautics and Astronautics, American Society of Mechanical Engineers, the American Society of Heating, Refrigeration and Air Conditioning Engineers, the Society of Automotive Engineers, American Ordnance Association and Sigma Xi.
الصفحة 690 - Survey, the Bureau of Land Management of the Department of the Interior, the...
الصفحة 451 - Earth must also be at levels which will not produce undesirable environmental or biological effects. Finally, the power must be in a form that can be converted, transmitted, and rectified with very high efficiency by known devices. All these conditions can best be met by a beam link in the microwave part of the spectrum. In this part of the spectrum a...
الصفحة 909 - Member of Sigma XI ; the American Association for the Advancement of Science ; American Astronautical Society ; American Society for Public Administration ; American Academy of Arts and Sciences (Boston) ; National Space Club; Foreign Policy Association ; National Academy of Engineering ; and International Academy of Astronautics.
الصفحة 452 - Microwave Rectification The receiving antenna is designed to intercept, collect and rectify the microwave beam into DC which can then be fed into a high-voltage DC transmission network or converted into 60-Hz AC. Half-wave dipoles distributed throughout the receiving antenna capture the microwave power and deliver it to solid-state microwave rectifiers.
الصفحة 459 - SSPS would require less than 2% of the yearly supply of critical materials, such as platinum, available to the United States. • Energy Consumption. The energy required to produce the materials required during SSPS construction as well as the propellants to place it into orbit would be repaid - ie, regenerated - in one to two years of SSPS operation.
الصفحة 452 - A series of microwave generators will be combined in a subarray (eg. about 10 m by 10m) which forms part of the antenna. Each subarray must be provided with an automatic phasing system so the individual antenna radiating elements will be in phase. These subarrays will be assembled into a slotted waveguide, phased-array, transmitting antenna about 1 km in diameter to obtain a microwave beam of a desired distribution (see Figure 9).
الصفحة 460 - ... sequences, random background energy, and other superfluous signals resulting from specific design approaches for the microwavegeneration devices could be controlled by filters, choice of frequency, and narrowband operation. Detailed and specific effects and impacts on radio astronomy services...
الصفحة 451 - Brown1 3 demonstrated that large amounts of power could be transmitted by microwaves. The efficiency of microwave power transmission will be high when the transmitting antenna in the SSPS and the receiving antenna on Earth are large. The dimensions of the transmitting antenna and the receiving antenna on Earth are governed by the distance between them and the choice of...