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  • ASTROPHYSICS  (15)
  • 1985-1989  (2)
  • 1980-1984  (6)
  • 1975-1979  (7)
  • 1965-1969
Collection
Keywords
Years
  • 1985-1989  (2)
  • 1980-1984  (6)
  • 1975-1979  (7)
  • 1965-1969
Year
  • 11
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    Intense magnetic fields at 1 AU: Solar cycle 20 (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Of the intense magnetic fields (greater than 13 gamma) observed at 1 AU during solar cycle 20 (1973-1975), 92% were associated with shocks, stream interfaces, or cold magnetic enhancements (CMEs). Most (52%) of the magnetic field intensity enhancements occurred at stream interfaces; 27% occurred behind shocks without interfaces; and 11% occurred in CMEs. The most intense fields (25 gamma to 37 gamma) followed shocks. Magnetic field intensities at interfaces did not exceed 25 gamma, suggesting a mechanism such as a magnetoacoustic wave limits the intensity ahead of streams. Intense magnetic fields persist longest behind shocks.
    Keywords: ASTROPHYSICS
    Type: NASA-TM-79674
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 12
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    A kinky heliospheric current sheet - Cause of CDAW-6 substorms (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Two magnetospheric substorms and the intensification of the second are caused by interplanetary magnetic field and ram pressure changes associated with a kinky heliospheric current sheet (KHCS). The responsible interplanetary features occur in a highly compressed region between a solar flare-associated shock wave and the cold driver gas. The possibility that the interplanetary structure is a 'magnetic cloud' is ruled out.
    Keywords: ASTROPHYSICS
    Type: Geophysical Research Letters (ISSN 0094-8276); 11; 339-342
    Format: text
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    NASA TECHNICAL REPORTS
  • 13
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    Interplanetary medium data book, appendix (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Computer generated listings of hourly average interplanetary plasma and magnetic field parameters are given. Parameters include proton temperature, proton density, bulk speed, an identifier of the source of the plasma data for the hour, average magnetic field magnitude and cartesian components of the magnetic field. Also included are longitude and latitude angles of the vector made up of the average field components, a vector standard deviation, and an identifier of the source of magnetic field data.
    Keywords: ASTROPHYSICS
    Type: NASA-TM-X-72615 , NSSDC/WDC-A-R/S-77-04A
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 14
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    Interplanetary medium data book (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Unresolved questions on the physics of solar wind and its effects on magnetospheric processes and cosmic ray propagation were addressed with hourly averaged interplanetary plasma and magnetic field data. This composite data set is described with its content and extent, sources, limits of validity, and the mutual consistency studies and normalizations to which the input data were subjected. Hourly averaged parameters were presented in the form of digital listings and 27-day plots. The listings are contained in a separately bound appendix.
    Keywords: ASTROPHYSICS
    Type: NASA-TM-X-72614 , NSSDC/WDC-A-R/S-77-04
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 15
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    An interplanetary magnetic field ensemble at 1 AU (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: A method for calculation ensemble averages from magnetic field data is described. A data set comprising approximately 16 months of nearly continuous ISEE-3 magnetic field data is used in this study. Individual subintervals of this data, ranging from 15 hours to 15.6 days comprise the ensemble. The sole condition for including each subinterval in the averages is the degree to shich it represents a weakly time-stationary process. Averages obtained by this method are appropriate for a turbulence description of the interplanetary medium. The ensemble average correlation length obtained from all subintervals is found to be 4.9 x 10 to the 11th cm. The average value of the variances of the magnetic field components are in the approximate ratio 8:9:10, where the third component is the local mean field direction. The correlation lengths and variances are found to have a systematic variation with subinterval duration, reflecting the important role of low-frequency fluctuations in the interplanetary medium.
    Keywords: ASTROPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 91; 59-69
    Format: text
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    NASA TECHNICAL REPORTS
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