Abstract
Dawn-dusk features of the plasmasphere are examined for intervals in February and September 1969, using electrostatic probe data ofN e andT e from the ISIS-I satellite. Clear plasmatrough formation is seen in the vicinity of 70° geomagnetic latitude in both dawn and dusk sectors in the 1500–3500 km region, but the plasmatrough is absent in the altitude range 500–1500 km. The plasmatrough minimum near 70°φ exhibits no asymmetry between dawn and dusk sectors in its latitudinal position. TheT e peak associated with the plasmatrough is more pronounced in the dawn sector. DawnN e is less than duskN e, but dawnT e exceeds duskT e. The influence of processes in the magnetosphere in causing these features is examined.
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Rajaram, G., Das, A.C. Features of electron density and temperature in the 500–3500 km region of the plasmasphere—(1) Dawn and dusk sectors. Proc. Indian Acad. Sci. 86, 423–434 (1977). https://doi.org/10.1007/BF03046857
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DOI: https://doi.org/10.1007/BF03046857