Physics
Scientific paper
Feb 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975fran.rept.....p&link_type=abstract
Final Report, 1 Jul. 1973 - 31 Jul. 1974 Franklin Inst., Swarthmore, PA. Bartol Research Foundation.
Physics
Ogo-5, Solar Electrons, Spectrometers, Data Correlation, Earth Magnetosphere, Electron Flux Density, Geomagnetism, Ionospheric Propagation, Magnetosheath, Riometers, Satellite Observation
Scientific paper
The interaction between the geomagnetic and interplanetary magnetic fields is studied through its effects upon the intensities of solar electrons reaching the polar caps during times of strongly anisotropic electron fluxes in the magnetosheath. During the particle event of November 18, 1968, electrons of solar origin were observed outside the magnetopause with detectors aboard OGO-5. Correlative studies of these satellite observations and concurrent measurements by riometers and ionospheric forward scatter systems in both polar regions revealed that the initial stage of the associated polar cap absorption event is attributable to the arrival of solar electrons. Evidence of a north-south asymmetry in the solar electron flux, at a time when the interplanetary magnetic field vector was nearly parallel with the ecliptic plane, supports an open magnetospheric model. The analysis indicates that an anisotropic electron flux may be isotropized at the magnetopause before propagating into the polar regions.
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