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  • ASTRONAUTICS (GENERAL)  (3)
  • Launch Vehicles and Launch Operations
  • 2005-2009
  • 1990-1994  (3)
  • 1991  (3)
  • 1
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    Optimal cycling between cislunar and cismartian libration points with reusable nuclear electric transfer vehicles (1991)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A cyclical Mars exploration scenario is described which combines the use of libration points in the earth-moon and sun-Mars systems with a pair of reusable nuclear electric propulsion (NEP) transfer vehicles. In this approach, the NEP transfer vehicles are stationed at the cislunar and cismartian libration points, and involves short cislunar point escape and capture spirals. It eliminates any spiral requirements at Mars by utilizing the cismartian point as a transportation node. Chemical/aerobrake vehicles are used to transport humans between earth and the cislunar point as well as between Mars and the cismartian point.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: AAS PAPER 91-104 , In: Spaceflight mechanics 1991; Proceedings of the 1st AAS(AIAA Annual Spaceflight Mechanics Meeting, Houston, TX, Feb. 11-13, 1991. Pt. 1 (A93-17901 05-13); p. 141-161.
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Satellite Repair Program (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: NASA-Goddard's Satellite Repair Program counts among its major achievements the successful use of welding in servicing equipment employed in the Flight Support System (FSS) structures addressed by the the Solar Maximum Repair Mission of 1984. The FSS berthing and positioning ring will again be employed with the Space Shuttle for the anticipated upgrading of the Hubble Space Telescope; the Explorer Platform (EP) mission will also use the FSS during the planned on-orbit exchange of the EUV Explorer payload for an X-ray Timing Explorer payload. The EP, to which attention is presently given, is the first spacecraft designed to be entirely serviceable by intravehicular activity or EVA.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: Welding in Space and the Construction of Space Vehicles by Welding; Sept. 24-26, 1991; New Carrollton, MD; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    The High Energy Solar Physics mission (HESP): Scientific objectives and technical description (1991)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: The High Energy Solar Physics mission offers the opportunity for major breakthroughs in the understanding of the fundamental energy release and particle acceleration processes at the core of the solar flare problem. The following subject areas are covered: the scientific objectives of HESP; what we can expect from the HESP observations; the high energy imaging spectrometer (HEISPEC); the HESP spacecraft; and budget and schedule.
    Keywords: ASTRONAUTICS (GENERAL)
    Type: NASA-TM-105033 , NAS 1.15:105033
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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