Journal articles
Source of the low-altitude hiss in the ionosphere
Abstract : We analyze the propagation properties of low-altitude hiss emission in the ionosphere observed by DEMETER (Detection of Electromagnetic Emissions Transmitted from Earthquake Regions). There exist two types of low-altitude hiss: type I emission at high latitude is characterized by vertically downward propagation and broadband spectra, while type II emission at low latitude is featured with equatorward propagation and a narrower frequency band above ∼f cH+. Our ray tracing simulation demonstrates that both types of the low-altitude hiss at different latitude are connected and they originate from plasmaspheric hiss and in part chorus emission. Type I emission represents magnetospheric whistler emission that accesses the ionosphere. Equatorward propagation associated with type II emission is a consequence of wave trapping mechanisms in the ionosphere. Two different wave trapping mechanisms are identified to explain the equatorial propagation of Type II emission; one is associated with the proximity of wave frequency and local proton cyclotron frequency, while the other occurs near the ionospheric density peak.
Cited literature [26 references]
https://hal-insu.archives-ouvertes.fr/insu-01503086
Contributor : Nathalie Pothier <>
Submitted on : Thursday, April 6, 2017 - 3:34:45 PM
Last modification on : Wednesday, September 23, 2020 - 4:36:39 AM
Long-term archiving on: : Friday, July 7, 2017 - 3:13:09 PM
Contributor : Nathalie Pothier <>
Submitted on : Thursday, April 6, 2017 - 3:34:45 PM
Last modification on : Wednesday, September 23, 2020 - 4:36:39 AM
Long-term archiving on: : Friday, July 7, 2017 - 3:13:09 PM
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