Ionospheric response to variable electric fields in small-scale auroral structures

Dayside midlatitude ionospheric response to storm time electric fields: A case study for 7 September 2002

[1] With the storm of 7–8 September 2002 as a study case, we demonstrate that an ionospheric model driven by a suitable storm time convection electric field can reproduce the F region dayside density enhancements associated with the ionospheric storm positive phase. The ionospheric model in this case is the Utah State University Time Dependent Ionospheric Model (TDIM); the electric field model ...

Ionospheric Models including the Auroral Environment

Modelling of the ionospheric-plasmaspheric electrondensity height profile N(h), as well as other parameters like the ion composition or electron and ion temperatures, over the whole altitude range for all geographical positions, time spans, and geophysical conditions is an essential part of ionospheric physics and a critical element in the development of practical schemes for ionospheric space ...

The occurrence frequency of auroral potential structures and electric fields as a function of altitude using Polar/EFI data

Abstract. The aim of the paper is to study how auroral potential structures close at high altitude. We analyse all electric field data collected by Polar on auroral field lines in 1996–2001 by integrating the electric field along the spacecraft orbit to obtain the plasma potential, from which we identify potential minima by an automatic method. From these we estimate the associated effective ma...

Electron cyclotron waves in the presence of parallel electric fields in the Earth’s auroral plasma

The electron cyclotron waves that originate at low altitudes ( 0.5 R E ) and observed by ground facilities have been studied in the presence of a weak parallel electric field in auroral magnetoplasma consisting of trapped energetic auroral electrons and cold background electrons of ionospheric origin. The model distribution for auroral trapped electrons is taken as Maxwellian ring distribution....

Incoherent Scatter Radar Observations of Westward Electric Fields and Plasma Densities in the Auroral Ionosphere, 1