Observation of ionospherically reflected quasiperiodic emissions by the DEMETER spacecraft - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Geophysical Research Letters Année : 2017

Observation of ionospherically reflected quasiperiodic emissions by the DEMETER spacecraft

Résumé

Quasiperiodic (QP) electromagnetic emissions are whistler mode waves at typical frequencies of a few kHz characterized by a periodic time modulation of their intensity. The DEMETER spacecraft observed events where the QP emissions exhibit a sudden change in the wave vector and Poynting vector directions. The change happens in a short interval of latitudes. We explain this behavior by ionospheric reflection and present a ray-tracing simulation which matches resulting wave vector directions. We also attempt to locate the source region of these emissions and conclude that they are most probably generated at the inner boundary of the plasmapause which also acts as a guide during the propagation of the QP emissions.
Fichier principal
Vignette du fichier
Hanzelka_et_al-2017-Geophysical_Research_Letters.pdf (1.36 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

insu-01619458 , version 1 (19-10-2017)

Identifiants

Citer

Miroslav Hanzelka, Ondřej Santolík, Mychajlo Hajoš, František Němec, Michel Parrot. Observation of ionospherically reflected quasiperiodic emissions by the DEMETER spacecraft. Geophysical Research Letters, 2017, 44 (17), pp.8721 - 8729. ⟨10.1002/2017GL074883⟩. ⟨insu-01619458⟩
64 Consultations
138 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More