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  • SPACECRAFT DESIGN, TESTING AND PERFORMANCE  (4)
  • SOLAR PHYSICS  (3)
  • 1
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    A satellite investigation of energy flux and inferred potential drop in auroral electron energy spectra (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Because predicted relationship (epsilon directly varies with V squared) between auroral electron energy flux (epsilon) and the inferred acceleration potential drop (V) for accelerated Maxwellian distributions was favorably tested by other using sounding rocket data for the limiting case of eVE 1 (where Ec is the characteristic energy of the accelerated Maxwellian distribution) and for a single inverted-V observed by the Injun 5 satellite, data from Atmosphere D were used to extend these studies over the range .2 eV/Ec 5 and for a wide range of latitudes and local times on both the nightside and the dayside. Results show good agreement with the full accelerated Maxwellian model. An analytical approximation to the electron energy flux was derived which better describes the data over the range .2 eV/Ec approximated 3. Analyses of individual energy spectra at small and large pitch angles through well-defined inverted-V structures suggest that the altitude of the inferred potential drop maximizes near the center of the inverted-V's.
    Keywords: SOLAR PHYSICS
    Type: Texas Univ. at San Antonio Res. on Solar-Wind Magnetospheric Elec. Fields and Plasmas; 16 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Subsatellite studies of wave, plasma, and chemical injections from Spacelab (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Previously cited in issue 06, p. 822, Accession no. A82-17775
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: (ISSN 0022-4560)
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Apparatus for assembling space structure (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An apparatus for producing a structure in outer space from rolls of prepunched ribbon or sheet material that are transported from the earth to the apparatus located in outer space is described. The apparatus spins the space structure similar to a spider spinning a web utilizing the prepunched ribbon material. The prepunched ribbon material is fed through the apparatus and is shaped into a predetermined channel-shaped configuration. Trusses are punched out of the ribbon and are bent downwardly and attached to a track which normally is a previously laid sheet of material. The size of the overall space structure may be increased by merely attaching an additional roll of sheet material to the apparatus.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Early experiments in charged particle beams from the Space Shuttle (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Characteristics of studies on board the Shuttle involving the interaction of particle beams with the atmosphere and the ionosphere, and the effects of the beams on the electrical potential of the platform, are discussed. Noting that the Shuttle allows greater weight and power demands by scientific payloads than previous satellite launches, the OSS-1 Vehicle Charging and Potential experiment and the Spacelab 1 Particle Accelerator and Phenomena Induced by Charged Particle Beams are described. Instrumentation details are provided, including charge and current probes, the Spherical Retarding Potential Analyzer, the Fast Pulse Electron Generator, and digital control and interface units. The SEPAC equipment, which comprises an electron beam accelerator, and MPD plasma jet, and diagnostic units are detailed, and operating procedures and experiment objectives are outlined.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AIAA PAPER 82-0083 , Aerospace Sciences Meeting; Jan 11, 1982 - Jan 14, 1982; Orlando, FL
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Research on solar-wind and magnetospheric electric fields and plasmas (1978)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Attempts were made to determine the role of the interplanetary magnetic field in controlling: (1) particle acceleration processes in the earth's polar cap; (2) plasma convection patterns at high latitudes; and, (3) the topology of magnetic field lines in the earth's polar cusps. The primary result of the study on polar-cap particle acceleration regions was that they tend to occur in only one polar cap at a time, and that they occur in the hemisphere for which the magnetospheric tail-lobe field lines have solar-magnetospheric x components that are antiparallel to those of the interplanetary and tail-lobe magnetic field. Southward-directed interplanetary magnetic fields give rise to broad convection throats which cover several hours of local time across the dayside cleft. Under such conditions, solar-wind plasma is channeled efficiently through the polar cusps to populate the plasma mantle and dayside boundary layer. On the other hand, the appearance of strong northward components in the interplanetary magnetic field result in a very constricted throat, resulting in inefficient plasma entry at the cusps by diffusion processes.
    Keywords: SOLAR PHYSICS
    Type: NASA-CR-158069
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Space plasma physics results from Spacelab 1 (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: Journal of Spacecraft and Rockets (ISSN 0022-4650); 23; 331-335
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Research on solar-wind and magnetospheric electric fields and plasmas (1981)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The phenomena of particle preciptation and ion convection at high latitudes and their response to variations in the interplanetary magnetic field. Data from the low energy electron experiment and the retarding potential analyzer drift meter on Atmosphere Explorers C and D were analyzed. Additional data from the spacecraft Imp-J were utilized.
    Keywords: SOLAR PHYSICS
    Type: NASA-CR-164372
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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