Statistics of multispacecraft observations of chorus dispersion and source location

0332601 - ÚFA 2010 RIV US eng J - Journal Article
Breneman, A. W. - Kletzing, C. A. - Pickett, J. - Chum, Jaroslav - Santolík, Ondřej
Statistics of multispacecraft observations of chorus dispersion and source location.
[Statistika vícedružicových pozorování disperze a zdrojových oblastí emisí typu chorus.]
Journal of Geophysical Research. Roč. 114, - (2009), A06202/1-A06202/12. ISSN 0148-0227
R&D Projects: GA AV ČR IAA301120601
Grant - others:NSF(US) 0307319; GA MŠk(CZ) ME 842
Institutional research plan: CEZ:AV0Z30420517
Keywords : chorus dispersion * chorus source location * multispacecraft observations
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 3.082, year: 2009

We report emission characteristics of 52 chorus events on 23 August 2003 and 10 events on three other days, modeled with a ray tracing technique. Chorus waves have a characteristic frequency/time variation that is a combination of frequency separation by propagation dispersion and a time-dependent source frequency emission drift. A cross-correlation technique comparing data from multiple Cluster spacecraft quantifies the frequency variation owing to propagation dispersion. The comparison of the data cross correlations with the simulated cross correlations allows the identification of a correlation region which has at least one common point with the chorus source region. Any remaining frequency/time variation in the single-spacecraft spectrograms not accounted for by the cross correlations is then used to determine the time-dependent source frequency emission drift.

Článek informuje o systematické analýze vlastností emisí typu chorus.
Permanent Link: http://hdl.handle.net/11104/0177814