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  • Other Sources  (4)
  • 1
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    Eyes on the moon. (1966)
    In:  Other Sources
    Details
    Publication Date: 2011-08-11
    Description: Data processing procedures used on flights of Rangers VII, VIII and IX, evaluating lunar photographs
    Keywords: SPACE SCIENCES
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    The CAMEO barium release - E/parallel/ fields over the polar cap (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Four successive thermite barium releases at an altitude of 965 km over polar cap invariant latitudes 84 to 76 deg near magnetic midnight were conducted from the orbiting second stage of the vehicle that launched Nimbus 7; the releases were made as part of the CAMEO (Chemically Active Material Ejected in Orbit) program. This was the first opportunity to observe the behavior of conventional barium release when conducted at orbital velocity in the near-earth magnetic field. The principal unexpected characteristic in the release dynamics was the high, 1.4 to 2.6 km/s, initial Ba(+) expansion velocity relative to an expected velocity of 0.9 km/s. Attention is also given to neutral cloud expansion, initial ion cloud expansion, convective motion, and the characteristics of field-aligned motion. The possibility of measuring parallel electric fields over the polar cap by observing perturbations in the motion of the visible ions is assessed.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 86; May 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Development of the first infrared satellite observatory (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A development history is given for the Infrared Astronomical Satelite (IRAS), whose primary mission objective is an unbiased, all-sky survey in the 8-120 micron wavelength range. A point source catalog of more than 200,000 IR sources, to be published later this year, represents the accomplishment of this objective. IRAS has also conducted 10,000 pointed observations of specific objects. Attention is given to the cost increases and schedule slips which resulted from the substantial technical challenges of IRAS hardware and software development, and to the management techniques which had to be employed in this major international project.
    Keywords: LAUNCH VEHICLES AND SPACE VEHICLES
    Type: AIAA PAPER 84-0079
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    High-performance space shuttle auxiliary propellant valve system (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Several potential valve closures for the space shuttle auxiliary propulsion system (SS/APS) were investigated analytically and experimentally in a modeling program. The most promising of these were analyzed and experimentally evaluated in a full-size functional valve test fixture of novel design. The engineering investigations conducted for both model and scale evaluations of the SS/APS valve closures and functional valve fixture are described. Preliminary designs, laboratory tests, and overall valve test fixture designs are presented, and a final recommended flightweight SS/APS valve design is presented.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NASA-CR-120976 , R-9078
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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