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  • SPACECRAFT PROPULSION AND POWER  (2)
  • SPACE SCIENCES (GENERAL)  (1)
  • SPACE TRANSPORTATION  (1)
  • 1
    Publication Date: 2011-08-24
    Description: An allusion to a 'double dawn' phenomenon in an ancient Chinese chronicle, which has been identified as caused by a sunrise eclipse occurring in 899 BC, is discussed. This event has been regarded as of considerable importance in the investigation of earth's past rotation. It is shown that an eclipse interpretation is implausible, not least because the eclipse in question was only annular.
    Keywords: SPACE SCIENCES (GENERAL)
    Type: Royal Astronomical Society, Quarterly Journal (ISSN 0035-8738); 33; 2, Ju; 91-98
    Format: text
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  • 2
    Publication Date: 2019-08-14
    Description: Earth-to-Orbit Propulsion Technology program is considered. The program's three major technical areas include combustion devices, turbomachinery, and controls and monitoring. Directed toward reducing acquisition and operations risk and cost the ETO program is conducted in two serially-performed categories: technology acquisition and technology validation. The former is constituted of studies, tool building, and bench-scale experimentation. The latter involves next-step verification of the acquisition results and findings, usually leading to a test-bed validated technology 'product'.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: IAF PAPER 91-258
    Format: text
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  • 3
    Publication Date: 2019-08-28
    Description: The paper discusses the primary objective of the NASA-OAST earth-to-orbit (ETO) propulsion technology program, namely, to completely overhaul the nation's liquid rocket design and analysis capabilities which were found to be severely limited when used for the design and development of the Space Shuttle Main Engine (SSME). Meeting this objective is to provide a much sounder, very comprehensive technology base that will enable the cost-effective low-risk development, acquisition, and operation of high-performance, expendable, or reusable ETO propulsion systems. This in turn will enable the future development of space transportation system launch vehicles with greatly reduced life-cycle costs. Work is carried out in three major areas: combustion devices, turbomachinery, and controls and health management.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: AIAA PAPER 92-1478
    Format: text
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  • 4
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    In:  Other Sources
    Publication Date: 2019-08-28
    Description: The overall objective of the NASA technology program for advanced space transportation systems is to provide the technology base for improved vehicle capability, greater mission flexibility, and much lower operational costs through full reusability. Earth-to-orbit-and-return vehicles are considered, taking into account structures and materials, reentry technology, and chemical propulsion. Attention is also given to orbital transfer vehicles, interplanetary transfer vehicles, and shuttle technology experiments. It is pointed out that the Space Shuttle will provide the first significant step towards low cost, workhorse type space transportation. The technology advances currently in work will provide a basis for a continuing reduction of transportation operational costs.
    Keywords: SPACE TRANSPORTATION
    Type: Space Congress; Apr 26, 1978 - Apr 28, 1978; Cocoa Beach, FL
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