Physics
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90..283w&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Jan. 1, 1985, p. 283-301. Sponsorship: Bundesministerium für Forschun
Physics
22
Bow Waves, Earth Magnetosphere, Energy Spectra, Interplanetary Space, Solar Protons, Hysteresis, International Sun Earth Explorer 2, Ion Density (Concentration)
Scientific paper
Temporal structures, energy spectra, and spatial gradients of 25-70 keV protons during four intense upstream ion events observed on December 3, 1977 are studied using the medium-energy particle telescope on ISEE 2. The connection path is introduced as the intersection of a field line with the bow shock surface between its first and last contact with the bow shock. The influence of the connection time and connection path on temporal structures, absolute intensities, and energy spectra is discussed. The specific orbit allows a direct determination of the field-aligned spatial gradient during a sequence of two events. Detailed analysis of anisotropies in the plane perpendicular to the radial direction reveals a number of hitherto unknown features of spatial gradients of the energetic ion density. The existence of a spatial gradient during the equilibrium phase of an event which points towards the nose of the bow shock is reported for the first time.
Fischer Mark Hannes
Keppler Erhard
Wibberenz Gerd
Zoellich F.
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