Longitudinal Dependence of Whistler Mode Electromagnetic Waves in the Earth's Inner Magnetosphere

Abstract : We use the measurements performed by the DEMETER (2004–010) and the Van Allen Probes (2012–016, still operating) spacecraft to investigate the longitudinal dependence of the intensity of whistler mode waves in the Earth's inner magnetosphere. We show that a significant longitudinal dependence is observed inside the plasmasphere on the nightside, primarily in the frequency range 400 Hz to 2 kHz. On the other hand, almost no longitudinal dependence is observed on the dayside. The obtained results are compared to the lightning occurrence rate provided by the Optical Transient Detector/Lightning Imaging Sensor mission normalized by a factor accounting for the ionospheric attenuation. The agreement between the two dependencies indicates that lightning-generated electromagnetic waves may be responsible for of the observed effect, thus substantially affecting the overall wave intensity in the given frequency range. Finally, we show that the longitudinal dependence is most pronounced for waves with oblique wave of normal angles.
Type de document :
Article dans une revue
Journal of Geophysical Research : Space Physics, American Geophysical Union/Wiley, 2018, 123 (8), pp.6562 - 6575. 〈10.1029/2018JA025284〉
Liste complète des métadonnées

https://hal-insu.archives-ouvertes.fr/insu-01897671
Contributeur : Nathalie Pothier <>
Soumis le : mercredi 24 octobre 2018 - 14:07:53
Dernière modification le : jeudi 7 février 2019 - 17:07:30
Document(s) archivé(s) le : vendredi 25 janvier 2019 - 14:03:58

Fichier

Z-hlava_et_al-2018-Journal_of_...
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Collections

Citation

J. Záhlava, F. Němec, O. Santolík, I. Kolmašová, G. Hospodarsky, et al.. Longitudinal Dependence of Whistler Mode Electromagnetic Waves in the Earth's Inner Magnetosphere. Journal of Geophysical Research : Space Physics, American Geophysical Union/Wiley, 2018, 123 (8), pp.6562 - 6575. 〈10.1029/2018JA025284〉. 〈insu-01897671〉

Partager

Métriques

Consultations de la notice

26

Téléchargements de fichiers

1