Physics
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976p%26ss...24.1177g&link_type=abstract
Planetary and Space Science, vol. 24, Dec. 1976, p. 1177-1185.
Physics
8
Ionospheric Electron Density, Night Sky, Plasmapause, Upper Ionosphere, Ariel 4 Satellite, Explorer Satellites, Graphs (Charts), Isis-B, Lines Of Force
Scientific paper
Electron-density observations made in the topside ionosphere by the Ariel 4 and Isis 2 satellites are examined in conjunction with results obtained by Explorer 45 when it traversed the near-equatorial plasmapause with one hour (both UT and MLT) of the Ariel and Isis traversals of the same L coordinate. Both dusk and night observations are analyzed, and an attempt is made to show that depressions in ionospheric electron density occur in the vicinity of the plasmapause field line. It is concluded that the electron distributions observed in the electron-density troughs at 550 km near dusk by Ariel and at 1400 km near midnight by Isis do not always parallel variations in the light-ion distribution inferred from the Explorer plasmapause traversals and that there appears to be no specific feature of the main ionospheric trough which can be used to identify the plasmapause field line except in a statistical sense.
(Kabasakal) Tulunay Y.
Grebowsky Joseph M.
Lanzerotti Louis J.
Maynard Nelson C.
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