Ionospheric signatures of magnetospheric boundaries in the post-noon sector

Details Ionospheric signatures of magnetospheric boundaries in the post-noon sector Ionospheric signatures of magnetospheric boundaries in the post-noon sector

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000angeo..18...74b&link_type=abstract

Annales Geophysicae, vol. 18, Issue 1, pp.74-80

Physics

2

Scientific paper

Spatial structures in ionospheric electron density revealed in a tomographic image have been identified with auroral forms and related to their sources in precipitating particles observed by DMSP satellites. The observations of plasma enhancements relate to discrete auroral arcs seen in the post-noon sector, identified by both red- and green-line emissions measured by a meridional scanning photometer. The features lie within a very narrow latitudinal band on L-shells where the satellite detectors observed electron precipitation classified as from the boundary plasma sheet (BPS). The harder particles are identified with an E-region structure, while further north the precipitation is softer, resulting in a localised F-layer blob and 630.0 nm emissions. A steep gradient in plasma density represent a signature in the ionosphere of the central plasma sheet (CPS)/BPS boundary. A transition to a less-structured F-layer is found on crossing the convection reversal boundary.

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