Computer Science
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.291...35k&link_type=abstract
In ESA, European Rocket and Balloon Programs and Related Research p 35-40 (SEE N90-13826 05-42)
Computer Science
Eiscat Radar System (Europe), Ionospheric Electron Density, Polar Regions, Sporadic E Layer, Earth Ionosphere, European Space Programs, Life (Durability), Metal Ions, Radiation Belts
Scientific paper
Narrow layers of enhanced electron density appearing at altitudes between 90 and 100 km are investigated. They are found to be of at least 3 distinct types: the first type consists of very narrow, short lived, sporadic E type layers, which can be associated with similar layers in neutral sodium, and which may be composed of metallic ions; the second type comprises broader, short lived layers which are seen in the magnetic evening and midnight sectors and which appear to be produced directly by precipitation of energetic electrons from the outer edge of the radiation belts; and the third type comprises persistent daytime/early evening layers which seem to be composed of unusual ion species, with the bulk of the ions having a short lifetime (not longer than a few tens of minutes).
Collis P. N.
Eliasson Lars
Haeggstroem I.
Kirkwood Sheila
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