The development of computational schemes for numerical modelling of the plasmapause and the aurorally-induced plasma density gradients is described. Variations in location of the equatorial plasmapause are simulated using computer-generated maps representing an ensemble of test particles evolving under co-rotational and convection electric fields. The model has been used to estimate the Transition Time (T sub p) from one stable, equilibrium plasmapause configuration to another and to reproduce Disturbance Scenarios ...
The main electron density trough in the topside ionosphere is investigated using ISIS 2 topside sounder data, DMSP auroral images and ground-base observations. A base-level ionospheric trough is characterized with the aid of ISIS 2 electron densities obtained under an optimum set of geophysical conditions, namely midwinter, local midnight and very quiet magnetospheric intervals. The statistical positions of the equatorward and poleward walls of the trough are examined in relation ...
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