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  • Chemistry  (18,452)
  • SPACECRAFT DESIGN, TESTING AND PERFORMANCE  (944)
  • SOLAR PHYSICS  (898)
  • 1985-1989  (8,041)
  • 1975-1979  (12,253)
  • 1985  (8,041)
  • 1976  (6,159)
  • 1975  (6,094)
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  • 1985-1989  (8,041)
  • 1975-1979  (12,253)
Year
  • 1
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    Unknown
    In:  Other Sources
    Publication Date: 2019-08-28
    Description: This videotape shows the five exploratory spacecraft, representing several countries, that will study Comet Halley: Giotto, Vega 1 and 2, Planet A, and Sakigaki.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: ASR-239 , NASA-TM-109608 , NONP-NASA-VT-93-190406
    Format: text
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  • 2
    Publication Date: 2019-08-28
    Description: The current status of the Solar Physics Program and the Magnetospheric Physics Program is discussed. The scientific context for each of the programs is presented, then the current programs and future plans are outlined.
    Keywords: SOLAR PHYSICS
    Type: NASA-TM-X-3440
    Format: application/pdf
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  • 3
    Publication Date: 2019-08-28
    Description: Preliminary results of the solar X-ray observations from Skylab are reviewed which indicate a highly structured nature for the corona, with closed magnetic-loop structures over a wide range of size scales. A description of the S-054 experiments is provided, and values are given for the parameters - including size, density, and temperature - describing a variety of typical coronal features. The structure and evolution of active regions, coronal holes, and bright points are discussed.
    Keywords: SOLAR PHYSICS
    Type: Astrophysics and Space Science; 39; Jan. 197
    Format: text
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  • 4
    Publication Date: 2019-08-28
    Description: The appearances of several X-ray active regions observed on March 7, 1970 and June 15, 1973 are compared with the corresponding coronal magnetic-field topology. Coronal fields have been computed from measurements of the longitudinal component of the underlying magnetic fields, based on the current-free hypothesis. An overall correspondence between X-ray structures and calculated field lines is established, and the magnetic counterparts of different X-ray features are also examined. A correspondence between enhanced X-ray emission and the location of compact closed field lines is suggested. Representative magnetic-field values calculated under the assumption of current-free fields are given for heights up to 200 sec.
    Keywords: SOLAR PHYSICS
    Type: Solar Physics; 44; Sept
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  • 5
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    In:  CASI
    Publication Date: 2019-08-28
    Description: A brief outline of the Viking 1 mission to Mars is followed by descriptions of the Martian landing site and the scientific instrumentation aboard Viking 1 orbiter and lander. Measurements of the Martian atmosphere provided data on its molecular composition, temperature and pressure. The detection of nitrogen in the Martian atmosphere indicates the existence of life. Panoramic photographs of the Martian surface were also obtained and are shown. Preliminary chemical and biological investigations on samples of Martian soil indicated the presence of the elements iron, calcium, silicon, titanium and aluminum as major constituents. Observed biochemical reactions were judged conducive of biological activity.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA-SP-408
    Format: application/pdf
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  • 6
    Publication Date: 2019-08-28
    Description: The scientific importance of the Advanced Solar Observatory (ASO) is discussed with emphasis on its soft X-ray, XUV, and EUV facilities. The principal achievement expected from the ASO's SXR/XUV and EUV telescope is a greatly improved resolution of the magnetic structure and activity in the transition region and corona. Observations from these facilities, combined with complementary observations of the photosphere and chromosphere from Solar Optical Telescope and of the higher corona from the Pinhole/Occulter Facility, are expectecd to yield significant advances in all major areas of solar physics concerning the causes and effects of solar magnetic fields.
    Keywords: SOLAR PHYSICS
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  • 7
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    In:  Other Sources
    Publication Date: 2019-08-28
    Description: The Space Station Advanced Development Program has the objective to transform promising new techniques into mature proven concepts to enable design options for the initial Space Station. It is pointed out that the options should improve system performance and reduce operational costs. Attention is given to the approach employed in the implementation of the program, the technology issues, aspects of Space Station evolution and growth, a Space Station technology overview, and subsystem technologies. The Advanced Development Power Program is considered along with the advanced development of auxiliary propulsion, the program dealing with attitude control and stabilization, and developments related to data management. Other developments are concerned with communication, system operation, manned systems technology, structures, and environmental control and life support.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
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  • 8
    Publication Date: 2019-08-28
    Description: The history of major Space Station designs over the last twenty-five years is reviewed. The evolution of design concepts is analyzed with respect to the changing functions of Space Stations; and available or anticipated technology capabilities. Emphasis is given to the current NASA Space Station reference configuration, the 'power tower'. Detailed schematic drawings of the different Space Station designs are provided.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: IAF PAPER 85-454
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  • 9
    Publication Date: 2019-08-28
    Description: The Advanced Technology Plan of the Fiscal Year (FY) 1986 is designed to focus on the most promising technology options applicable to the Space Station (SS), selected from the list of tasks identified by the FY 1984 Technology Program as the most critical technologies to be developed for the initial SS Initial Operating Capability. Most of the current activities are in the stages of manufacture and life tests of specific SS subsystems. Special attention is given to major technologies, which include power systems (PSs) (with emphasis on a Solar Dynamic PS concept); the thermal control system (with the focus on the 'thermal bus' concept); the environmental control and life support system; and the data management system; all are illustrated schematically. Other tasks, including dynamics, communications, extravehicular activities, mechanics, propulsion, and fluid, as well as the tasks of cost, maintainability, automation and robotics, and productivity are discussed.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: IAF PAPER 85-28
    Format: text
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  • 10
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    In:  CASI
    Publication Date: 2019-08-28
    Description: Physical and applied aspects of the electrification of space vehicles and natural celestial objects are discussed, the factors resulting in electrification of spacecraft are analyzed, and methods of investigating various phenomena associated with this electrification and ways of protecting spacecraft against the influence of static electricity are described. The booklet is intended for the general reader interested in present day questions of space technology.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA-TM-77653 , NAS 1.15:77653
    Format: application/pdf
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