Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987baicz..38..276k&link_type=abstract
Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 38, no. 5, 1987, p. 276-282.
Astronomy and Astrophysics
Astronomy
1
Earth Magnetosphere, Solar Cosmic Rays, Solar Electrons, Field Aligned Currents, Plasma Layers, Polar Cusps, Space Plasmas
Scientific paper
The electron fluxes on two low-altitude polar orbiting satellites during two events when solar cosmic ray electrons (SCRE) are present in the interplanetary medium are examined with the aim to deduce positions of dayside cusp and plasmasheet projection into low altitudes. SCRE penetration into the magnetosphere has different character for Bz > 0 and Bz < 0, respectively. For Bz > 0 the polar caps are filled by electrons relatively slowly while for Bz < 0 the intensity in the whole polar cap is high and has a character of plateau. An empirical formula for dependence of boundary position in kinetic pressure of solar wind is found while its dependence on geodipole tilt angle is negligible. The inconsistency in difference in boundary position in south and north hemisphere with magnetospheric models is stressed. The results illustrate the possibilities of mapping the boundary regions of magnetosphere by energetic electron registration at low altitudes.
Kudela Karel
Kuznetsov Sergei N.
Sosnovets Eh. N.
Tverskaia L. V.
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