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Statements

Subject Item
n2:RIV%2F68378289%3A_____%2F09%3A00335031%21RIV10-AV0-68378289
rdf:type
skos:Concept n17:Vysledek
dcterms:description
We report observations of remarkable frequency differences and time shifts between the corresponding elements of lower band chorus recorded by the four Cluster spacecraft at low magnetic latitudes. Surprisingly, the spacecraft located closer to the equator systematically received the corresponding chorus elements later than the spacecraft located at higher magnetic latitudes. The time shifts and frequency differences depended almost linearly on the perpendicular distance between the various spacecraft. Analysis of data shows that chorus emissions were generated with highly oblique angles of propagation. We show that the sources moving across the magnetic field lines are reasonably consistent with these observations. We propose that the transverse motion of the chorus sources is a consequence of a feedback between the oblique waves and counter streaming electrons during nonlinear cyclotron interactions, and we provide an estimate of the transverse velocity of the source. We report observations of remarkable frequency differences and time shifts between the corresponding elements of lower band chorus recorded by the four Cluster spacecraft at low magnetic latitudes. Surprisingly, the spacecraft located closer to the equator systematically received the corresponding chorus elements later than the spacecraft located at higher magnetic latitudes. The time shifts and frequency differences depended almost linearly on the perpendicular distance between the various spacecraft. Analysis of data shows that chorus emissions were generated with highly oblique angles of propagation. We show that the sources moving across the magnetic field lines are reasonably consistent with these observations. We propose that the transverse motion of the chorus sources is a consequence of a feedback between the oblique waves and counter streaming electrons during nonlinear cyclotron interactions, and we provide an estimate of the transverse velocity of the source.
dcterms:title
Oblique lower band chorus waves: Time shifts between discrete elements observed by the Cluster spacecraft Oblique lower band chorus waves: Time shifts between discrete elements observed by the Cluster spacecraft
skos:prefLabel
Oblique lower band chorus waves: Time shifts between discrete elements observed by the Cluster spacecraft Oblique lower band chorus waves: Time shifts between discrete elements observed by the Cluster spacecraft
skos:notation
RIV/68378289:_____/09:00335031!RIV10-AV0-68378289
n4:aktivita
n13:P n13:Z
n4:aktivity
P(GA205/09/1253), P(IAA301120601), Z(AV0Z30420517), Z(MSM0021620860)
n4:cisloPeriodika
-
n4:dodaniDat
n16:2010
n4:domaciTvurceVysledku
n10:1231979 n10:9496726
n4:druhVysledku
n8:J
n4:duvernostUdaju
n14:S
n4:entitaPredkladatele
n11:predkladatel
n4:idSjednocenehoVysledku
330568
n4:idVysledku
RIV/68378289:_____/09:00335031
n4:jazykVysledku
n18:eng
n4:klicovaSlova
plasma waves; wave particle interaction; inner magnetosphere; radiation belt
n4:klicoveSlovo
n15:inner%20magnetosphere n15:plasma%20waves n15:wave%20particle%20interaction n15:radiation%20belt
n4:kodStatuVydavatele
US - Spojené státy americké
n4:kontrolniKodProRIV
[6B43D046ED28]
n4:nazevZdroje
Journal of Geophysical Research
n4:obor
n9:BL
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
4
n4:projekt
n6:IAA301120601 n6:GA205%2F09%2F1253
n4:rokUplatneniVysledku
n16:2009
n4:svazekPeriodika
114
n4:tvurceVysledku
Pickett, J. S. Santolík, Ondřej Gurnett, D. A. Chum, Jaroslav
n4:wos
000272946500001
n4:zamer
n5:AV0Z30420517 n5:MSM0021620860
s:issn
0148-0227
s:numberOfPages
13