Articles | Volume 20, issue 7
Ann. Geophys., 20, 981–996, 2002
https://doi.org/10.5194/angeo-20-981-2002

Special issue: SPACE WEATHER

Ann. Geophys., 20, 981–996, 2002
https://doi.org/10.5194/angeo-20-981-2002

  31 Jul 2002

31 Jul 2002

A first approach to model the low-frequency wave activity in the plasmasphere

R. André1, F. Lefeuvre1, F. Simonet2, and U. S. Inan3 R. André et al.
  • 1LPCE/CNRS, 3A Av. de la Recherche Scientifique, 45071 Orléans Cedex, France
  • 2CEA/ DAM Ile-de France, Département de Physique Théorique et Appliquée, BP 12, 91680 Bruyères le Chatel, France
  • 3STAR/Stanford University, USA
  • Correspondence to: F. Lefeuvre
  • (lefeuvre@cnrs-orleans.fr)

Abstract. A comprehensive empirical model of waves is developed in the objective to simulate wave-particle interactions involved in the loss and acceleration of radiation belt electrons. Three years of measured magnetic wave field components from the Plasma Wave Instrument on board the DE-1 satellite are used to model the amplitude spectral density of the magnetic wave field of each type of emission observed in the equatorial regions of the plasmasphere: VLF transmitter emissions, chorus emissions, plasmaspheric hiss emissions and equatorial emissions below ~ 200 Hz. Each model is a function of the wave frequency f , the MLT, L and Mlat parameters, and the Kp values. The performances of the plasmaspheric hiss and chorus models are tested on amplitude spectra recorded on board the OGO-5 and GEOS-1 satellites.

Key words. Magnetospheric physics (plasmasphere; plasma waves and instabilities; instruments and techniques)

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