Observation of ionospherically reflected quasiperiodic emissions by the DEMETER spacecraft

Abstract : 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.
Document type :
Journal articles
Complete list of metadatas

Cited literature [23 references]  Display  Hide  Download

https://hal-insu.archives-ouvertes.fr/insu-01619458
Contributor : Nathalie Pothier <>
Submitted on : Thursday, October 19, 2017 - 2:18:02 PM
Last modification on : Thursday, July 25, 2019 - 4:16:03 PM
Long-term archiving on : Saturday, January 20, 2018 - 1:25:18 PM

File

Hanzelka_et_al-2017-Geophysica...
Publisher files allowed on an open archive

Identifiers

Collections

Citation

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

Share

Metrics

Record views

114

Files downloads

97