Physics – Plasma Physics
Scientific paper
Nov 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978p%26ss...26..993f&link_type=abstract
Planetary and Space Science, vol. 26, Nov. 1978, p. 993-1006. Research supported by the Consiglio Nazionale delle Ricerche.
Physics
Plasma Physics
1
Atmospheric Physics, Cusps, Ionospheric Electron Density, Plasma Physics, Polar Regions, Electron Energy, Energy Spectra, Geomagnetic Latitude, Plasma Diagnostics
Scientific paper
Results are presented for a statistical study of the dayside polar cusp based on HEOS 2 observations of low-energy electrons (mostly 35 to 50 eV, but occasionally up to 170 to 280 eV). The observations indicate that the cusp is located mostly at solar magnetic (SM) latitudes of 60 to 70 deg from 3 to 10 earth radii (North Pole) or around 1.5 to 2.5 earth radii (South Pole). The cusp is found to extend only within + or - 60 deg of the noon meridian plane in longitude, to be 4.2 deg thick in invariant latitude, and to be located at 79-84 deg in the noon meridian plane, decreasing to 70-74 deg at + or - 50 deg longitude from that plane. No dawn-dusk asymmetry is detected in the electron flow properties at the distances in which most of the data were taken (6 to 10 earth radii).
Bavassano-Cattaneo M. B.
Formisano Vittorio
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