About: On the numerical modelling of VLF chorus dynamical spectra

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	This paper presents a study of the use of a one-dimensional Vlasov Hybrid Simulation (VHS) computer code to simulate the dynamical spectra (I.e. Frequency versus time spectrograms) of ELF/VLF chorus signals (from a fraction to 10 kHz). Recently excellent measurements of chorus have been made in the source region close to the geomagnetic equator aboard the four spacecraft Cluster mission. Using Cluster data for wave amplitude, which is up to 300 pT, local gyrofrequency, cold plasma density, and Lshell, observed chorus signals are reproduced with remarkable fidelity and, in particular, sweep rates in the range 1–10 kHz result as observed. Further, we find that the sweep rate is a falling function of increasing cold plasma density, again in accord with observations. Finally, we have satisfactorily simulated the rather rare falling frequency elements of chorus which are sometimes observed aboard Cluster in the generation region. This paper presents a study of the use of a one-dimensional Vlasov Hybrid Simulation (VHS) computer code to simulate the dynamical spectra (I.e. Frequency versus time spectrograms) of ELF/VLF chorus signals (from a fraction to 10 kHz). Recently excellent measurements of chorus have been made in the source region close to the geomagnetic equator aboard the four spacecraft Cluster mission. Using Cluster data for wave amplitude, which is up to 300 pT, local gyrofrequency, cold plasma density, and Lshell, observed chorus signals are reproduced with remarkable fidelity and, in particular, sweep rates in the range 1–10 kHz result as observed. Further, we find that the sweep rate is a falling function of increasing cold plasma density, again in accord with observations. Finally, we have satisfactorily simulated the rather rare falling frequency elements of chorus which are sometimes observed aboard Cluster in the generation region. (en)
Title	On the numerical modelling of VLF chorus dynamical spectra On the numerical modelling of VLF chorus dynamical spectra (en)
skos:prefLabel	On the numerical modelling of VLF chorus dynamical spectra On the numerical modelling of VLF chorus dynamical spectra (en)
skos:notation	RIV/68378289:_____/09:00332612!RIV10-AV0-68378289
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA205/06/1267), Z(AV0Z30420517), Z(MSM0021620860)
http://linked.open...iv/cisloPeriodika	6
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Santolík, Ondřej
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky atmosféry AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	331558
http://linked.open...ai/riv/idVysledku	RIV/68378289:_____/09:00332612
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	chorus; numerical modelling (en)
http://linked.open.../riv/klicoveSlovo	numerical modelling chorus
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[C81F354C6F92]
http://linked.open...i/riv/nazevZdroje	Annales Geophysicae
http://linked.open...in/vavai/riv/obor	BL
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Low-frequency wave coupling of the atmosphere, ionosphere, and inner magnetosphere of the Earth
http://linked.open...UplatneniVysledku	2009
http://linked.open...v/svazekPeriodika	27
http://linked.open...iv/tvurceVysledku	Santolík, Ondřej Nunn, D. Rycroft, M. Trakhtengerts, V.
http://linked.open...ain/vavai/riv/wos	000267543600009
http://linked.open...n/vavai/riv/zamer	Studium atmosférického obalu Země v interakci s pozemskými a kosmickými vlivy Fyzikální studium objektů a procesů ve sluneční soustavě a v astrofyzikálních systémech
issn	0992-7689
number of pages	19 (xsd:int)
is http://linked.open...avai/riv/vysledek of	On the numerical modelling of VLF chorus dynamical spectra On the numerical modelling of VLF chorus dynamical spectra On the numerical modelling of VLF chorus dynamical spectra On the numerical modelling of VLF chorus dynamical spectra

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