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  • GEOPHYSICS  (2)
  • abundances
  • 1970-1974  (2)
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  • 1
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    Electron polar cap and the boundary of open geomagnetic field lines. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A total of 333 observations of the boundary of the polar access region for electrons (energies greater than 530 keV) provides a comprehensive map of the electron polar cap. The boundary of the electron polar cap, which should occur at the latitude separating open and closed field lines, is consistent with previously reported closed field line limits determined from trapped-particle data. The boundary, which is sharply defined, seems to occur at one of three discrete latitudes. Although the electron flux is generally uniform across the polar cap, a limited region of reduced access is observed about 10% of the time.
    Keywords: GEOPHYSICS
    Type: NSSDC-ID-67-073A-O8-PM , Journal of Geophysical Research; 77; Oct. 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    High energy electron spikes at high latitudes (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Over 750 spikes of precipitating electrons with E or = 425 KeV were observed aboard the low altitude polar orbiter OGO-D between 30 July 1967 and 31 December 1967. The spikes may be divided into three distinct populations, depending on whether they occur at latitudes below, at, or above the local limit of trapping.
    Keywords: GEOPHYSICS
    Type: NASA-CR-122512 , SRL-72-1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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