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Analysis of subprotonospheric whistlers observed by DEMETER: A case study
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SYSNO ASEP 0322561 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Analysis of subprotonospheric whistlers observed by DEMETER: A case study Title Analýza subprotonosférických hvizdů pozorovaných na družici DEMETER: Případová studie Author(s) Chum, Jaroslav (UFA-U) RID, ORCID
Santolík, Ondřej (UFA-U) RID, ORCID
Parrot, M. (FR)Number of authors 3 Source Title Journal of Geophysical Research - ISSN 0148-0227
Roč. 114, A02 (2009), A02307/1-A02307/17Number of pages 17 s. Publication form web - web Language eng - English Country US - United States Keywords waves in plasma ; propagation and reflection of lightning induced whistlers ; ion composition in the upper ionosphere Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects GA205/06/1267 GA ČR - Czech Science Foundation (CSF) GA205/06/0875 GA ČR - Czech Science Foundation (CSF) IAA300420603 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) IAA301120601 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z30420517 - UFA-U, BC-A (2005-2011) UT WOS 000263331300002 DOI 10.1029/2008JA013585 Annotation Subprotonospheric (SP) whistlers consist of a series of low-dispersion components that result from repeated reflections between the base of the ionosphere and altitudes up to 1000 km owing to oblique propagation and increasing LHR frequency in the upper ionosphere. We have used wave-normal angles and plasma characteristics measured by the DEMETER microsatellite as an input for a 3D ray tracing technique. We conclude that the individual components of the SP whistler propagate along different raypaths. The reflected components enter the ionosphere at relatively large distances from the satellite. Depending on the initial wave-normal angle, these waves undergo a different number of reflections before reaching the satellite, thus arriving with different time delays. The first component observed of a SP whistler is formed by waves entering the ionosphere at relatively small distances from the satellite footprint and at relatively small wave-normal angles. These waves propagate to the opposite hemisphere. Workplace Institute of Atmospheric Physics Contact Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Year of Publishing 2009
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