Low-altitude signatures of the cusp and flux transfer events

Details Low-altitude signatures of the cusp and flux transfer events Low-altitude signatures of the cusp and flux transfer events

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16..879l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 16, Aug. 1989, p. 879-882.

Physics

57

Flux Transfer Events, Ion Injection, Magnetic Signatures, Magnetopause, Polar Cusps, Radar Tracking, Earth Ionosphere, Field Aligned Currents, Low Altitude, Time Dependence

Scientific paper

Cusp-like ion injection was studied using DE-2 satellite data obtained during strongly southward IMF. Although magnetosheath ion injection signatures are detected, the satellite motion and convection are opposed, and it is suggested that the observed falling energy dispersion of the precipitating ions may have arisen from a static moving or growing source. The spatial scale of the flux is found to be typical of that of a flux transfer event (FTE). A simple model of the ionospheric signature of an FTE is able to reproduce the observed electric and magnetic field perturbations. Precipitating electrons with peak energies of about 100 eV lie on the predicted boundary of the newly opened tube and are similar to those noted on the edges of FTEs at the magnetopause.

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