Source of the low-altitude hiss in the ionosphere
Chen, Lunjin; Santolík, Ondrej; Hajoš, Mychajlo; Zheng, Liheng; Zhima, Zeren; Heelis, Roderick; Hanzelka, Miroslav; Horne, Richard B. ORCID: https://orcid.org/0000-0002-0412-6407; Parrot, Michel. 2017 Source of the low-altitude hiss in the ionosphere. Geophysical Research Letters, 44 (5). 2060-2069. 10.1002/2016GL072181
Before downloading, please read NORA policies.Preview |
Text
Copyright American Geophysicsl Union Chen_et_al-2017-Geophysical_Research_Letters.pdf - Published Version Download (5MB) | Preview |
Abstract/Summary
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 ∼fcH+. 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.
Item Type: | Publication - Article |
---|---|
Digital Object Identifier (DOI): | 10.1002/2016GL072181 |
Programmes: | BAS Programmes > BAS Programmes 2015 > Space Weather and Atmosphere |
ISSN: | 00948276 |
Additional Keywords: | ionospheric hiss, low-altitude hiss, plasmaspheric hiss, ray tracing |
Date made live: | 18 Apr 2017 13:51 +0 (UTC) |
URI: | https://nora.nerc.ac.uk/id/eprint/516874 |
Actions (login required)
View Item |
Document Downloads
Downloads for past 30 days
Downloads per month over past year