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  • Other Sources  (3)
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  • 1
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    The Advanced Solar Observatory (1990)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: A conceptual plan for the development of a comprehensive long duration solar space observatory, The Advanced Solar Observatory (ASO) is described. The ASO is intended to provide solar astronomers with the observational power necessary to address fundamental problems relating to the solar convection zone and activity cycle; the thermal and nonthermal processes that control the transport of energy, mass, and magnetic flux in the solar atmosphere; the generation of the solar wind; and the dynamics of the inner heliosphere. The ASO concept encompasses three proposed Space Station-based instrument ensembles: (1) the High Resolution Telescope Cluster, which includes far ultraviolet, extreme ultraviolet, and X-ray telescopes; (2) the Pinhole/Occulter Facility, which includes Fourier transform and coded aperture hard X-ray and gamma ray telescopes and occulted ultraviolet and visible light coronagraphs; and (3) the High Energy Facility, which contains neutron, gamma ray, and low frequency radio spectrometers. Two other facilities, the Orbiting Solar Laboratory, and a package of Global Dynamics Instrumentation, will, with the Space Station ensembles, form a comprehensive capability for solar physics. The scientific program of the ASO, current instrument concepts for the Space Station based ASO instrument ensembles, and plans for their accommodation on the Space Station are described.
    Keywords: ASTRONOMY
    Type: Optical Engineering (ISSN 0091-3286); 29; 1306-131
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Payload isolation and stabilization by a Suspended Experiment Mount (SEM) (1992)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Many Space Shuttle and Space Station payloads can benefit from isolation from crew or attitude control system disturbances. Preliminary studies have been performed for a Suspended Experiment Mount (SEM) system that will provide isolation from accelerations and stabilize the viewing direction of a payload. The concept consists of a flexible suspension system and payload-mounted control moment gyros. The suspension system, which is rigidly locked for ascent and descent, isolates the payload from high frequency disturbances. The control moment gyros stabilize the payload orientation. The SEM will be useful for payloads that require a lower-g environment than a manned vehicle can provide, such as materials processing, and for payloads that require stabilization of pointing direction, but not large angle slewing, such as nadir-viewing earth observation or solar viewing payloads.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA-TM-107941 , NAS 1.15:107941
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Orbiter Motion - Microgravity and pointing (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The Orbiter Motion section of the Environet Data Base deals with the acceleration and pointing environment on the Space Shuttle Orbiter. This paper presents a discussion of the contents of this section, how to effectively use the material, and plans for further development and modification of the material. Topics covered in the section include types of disturbance forces, terminology, instrumentation, and sources of motion. The sources of motion are further classified as gravity-gradient, aerodynamic drag, thrusting events, crew motion, and machinery motion. Acceleration levels given are the results of direct measurement and also calculation from known force levels. Where appropriate, power spectral density has been used to evaluate frequency content of the acceleration time history. The pointing accuracy of the Orbiter and instruments carried by the Orbiter for fine pointing is also given.
    Keywords: ASTRODYNAMICS
    Type: AIAA PAPER 88-0013
    Format: text
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    NASA TECHNICAL REPORTS
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