0176482 - UFA-U 20033528 RIV DE eng J - Journal Article
Titova, E. E. - Kozelov, B. V. - Jiříček, František - Šmilauer, Jan - Demekhov, A. G. - Trakhtengerts, V. Yu.
Verification of the backward wave oscillator model of VLF chorus generation using data from MAGION 5 satellite.
Annales Geophysicae. Roč. 21, - (2003), s. 1073-1081. ISSN 0992-7689. E-ISSN 1432-0576
R&D Projects: GA AV ČR IAA3042201
Grant - others:INTAS(GB) 99-0502; RFBR(RU) 01-05-643829; RFBR(RU) 02-02-17109
Institutional research plan: CEZ:AV0Z3042911
Keywords : magnetospheric physics (VLF emissions, energetic particles) * space plasma physics (wave-particle interactions)
Subject RIV: DG - Athmosphere Sciences, Meteorology
Impact factor: 1.031, year: 2003

We present a detailed study of chorus emissions in the magnetosphere detected on board Magion 5, when the satellite was not far from the magnetic equator. We determine the frequency sweep rate of more than 8500 electromagnetic VLF chorus elements. These results are compared with the backward wave oscillator (BWO) regime of chorus generation. Comparison of the frequency sweep rate with the BWO model shows: (i) There is correlation between the frequency sweep rates and the chorus amplitudes. The frequency sweep rate increases with chorus amplitude, in accordance with expectations from the BWO model; (ii) The chorus growth rate, estimated from the frequency sweep rate, is in accord with that inferred from the BWO generation mechanism; (iii) The BWO regime of chorus generation ensures the observed decrease in the frequency sweep rate of the chorus elements with increasing L-shell.
Permanent Link: http://hdl.handle.net/11104/0073458