Abstract
Measurements by the Alouette I satellite over the winter pole reveal an electron density distribution which is stationary with respect to the Sun. The chief feature is a ring of high density plasma throughout the height range accessible to the satellite.
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ANDREWS, M., THOMAS, J. Electron Density Distribution above the Winter Pole. Nature 221, 223–227 (1969). https://doi.org/10.1038/221223a0
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DOI: https://doi.org/10.1038/221223a0
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