A statistical study of geomagnetic field line resonance properties

Author

Ndiitwani, D.C. ; Sutcliffe, P.R.

Author_Institution

Hermanus Magn. Obs., Hermanus, South Africa

fYear

2011

fDate

13-20 Aug. 2011

Firstpage

1

Lastpage

4

Abstract

The propagation of ultra low frequency (ULF) waves, in the frequency range of 1-100 mHz, from the mag- netosphere to the ground where they are usually detected is greatly affected by the Earth´s ionosphere. The ionosphere presents a conducting interface between the magnetosphere and atmosphere. In this work magnetic field measurements observed in the topside ionosphere by low Earth orbiting CHAMP satellite and Hermanus (HER) ground station data set is used to test magnetohydrodynamics (MHD) theoretical predictions. This paper aims to illustrate the effect of the ionospheric currents on the propagation ULF waves in the Earth´s magnetosphere. This is attempted by studying field line resonance (FLR) events observed at Hermanus and by CHAMP satellite on crossing HER latitude.

Keywords

ionospheric electromagnetic wave propagation; magnetohydrodynamics; Earth orbiting CHAMP satellite; Hermanus ground station data set; frequency 1 mHz to 100 mHz; geomagnetic field line resonance properties; ionosphere; ionospheric currents; magnetic field measurements; magnetohydrodynamics; magnetosphere; ultra low frequency waves propagation; Ionosphere; Magnetic resonance; Magnetohydrodynamics; Magnetometers; Magnetosphere; Satellites;

fLanguage

English

Publisher

ieee

Conference_Titel

General Assembly and Scientific Symposium, 2011 XXXth URSI

Conference_Location

Istanbul

Print_ISBN

978-1-4244-5117-3

Type

conf

DOI

10.1109/URSIGASS.2011.6123723

Filename

6123723