Publication Date:
2019-06-28
Description:
Energetic ion mass spectrometer data obtained on ISEE 1 are analyzed to show that the plasma in the subsolar magnetospheric boundary layer, magnetopause, and adjacent magnetosheath has an ionospheric component, He(+) and O(+), and a solar wind component, H(+) and He(++). Nine intervals when the ISEE 1 and 2 fast plasma and magnetometer data clearly define the magnetopause are examined, and observations indicate that He(+) is more predominant than O(+), in the subsolar boundary layer and the magnetosheath. In five of the boundary layer intervals, keV He(+) ions are observed, and energetic O(+) ions are seen above background in two of the boundary layers where He(+) is observed
Keywords:
GEOPHYSICS
Format:
text
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