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Statements

Subject Item
n2:RIV%2F68378289%3A_____%2F09%3A00332612%21RIV10-AV0-68378289
rdf:type
skos:Concept n12:Vysledek
dcterms: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.
dcterms:title
On the numerical modelling of VLF chorus dynamical spectra On the numerical modelling of VLF chorus dynamical spectra
skos:prefLabel
On the numerical modelling of VLF chorus dynamical spectra On the numerical modelling of VLF chorus dynamical spectra
skos:notation
RIV/68378289:_____/09:00332612!RIV10-AV0-68378289
n5:aktivita
n9:Z n9:P
n5:aktivity
P(GA205/06/1267), Z(AV0Z30420517), Z(MSM0021620860)
n5:cisloPeriodika
6
n5:dodaniDat
n7:2010
n5:domaciTvurceVysledku
n13:9496726
n5:druhVysledku
n11:J
n5:duvernostUdaju
n8:S
n5:entitaPredkladatele
n6:predkladatel
n5:idSjednocenehoVysledku
331558
n5:idVysledku
RIV/68378289:_____/09:00332612
n5:jazykVysledku
n15:eng
n5:klicovaSlova
chorus; numerical modelling
n5:klicoveSlovo
n14:numerical%20modelling n14:chorus
n5:kodStatuVydavatele
US - Spojené státy americké
n5:kontrolniKodProRIV
[C81F354C6F92]
n5:nazevZdroje
Annales Geophysicae
n5:obor
n17:BL
n5:pocetDomacichTvurcuVysledku
1
n5:pocetTvurcuVysledku
4
n5:projekt
n18:GA205%2F06%2F1267
n5:rokUplatneniVysledku
n7:2009
n5:svazekPeriodika
27
n5:tvurceVysledku
Trakhtengerts, V. Nunn, D. Rycroft, M. Santolík, Ondřej
n5:wos
000267543600009
n5:zamer
n10:MSM0021620860 n10:AV0Z30420517
s:issn
0992-7689
s:numberOfPages
19