Dispersion properties of ducted whistlers, generated by lightning discharge

Pasmanik, D. L.; Trakhtengerts, V. Yu.

doi:10.5194/angeo-23-1433-2005

Cited by 22 publications

(16 citation statements)

References 16 publications

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“…In spite of this long history, terrestrial whistlers still attract active research, for example in connection with lightning‐induced precipitation of energetic electrons [ Peter and Inan , 2004, 2007; Bortnik et al , 2006; Inan et al , 2007], with propagation of whistlers in magnetospheric density structures and ducts [ McCormick et al , 2002; Platino et al , 2005; Pasmanik and Trakhtengerts , 2005], with loss processes in the Van Allen radiation belts [ Bortnik et al , 2003; Rodger et al , 2003], with the dynamics of the slot region [ Meredith et al , 2007], and with the still controversial question of the origin of plasmaspheric hiss [ Sonwalkar and Inan , 1989; Draganov et al , 1992; Green et al , 2005, 2006; Thorne et al , 2006; Bortnik et al , 2008].…”

Section: Introductionmentioning

confidence: 99%

Propagation of unducted whistlers from their source lightning: A case study

et al. 2009

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[1] We analyze nightside measurements of the DEMETER spacecraft related to lightning activity. At the 707 km altitude of DEMETER, we observe 3-D electric and magnetic field waveforms of fractional-hop whistlers. At the same time, the corresponding atmospherics are recorded by a very low frequency (VLF) ground-based station located in Nançay (France). The source lightning strokes are identified by the METEORAGE lightning detection network. We perform multidimensional analysis of the DEMETER measurements and obtain detailed information on wave polarization characteristics and propagation directions. This allows us for the first time to combine these measurements with ray-tracing simulation in order to directly characterize how the radiation penetrates upward through the ionosphere. We find that penetration into the ionosphere occurs at nearly vertical wave vector angles (as was expected from coupling conditions) at distances of 100-900 km from the source lightning. The same distance is traveled by the simultaneously observed atmospherics to the VLF ground station. The measured dispersion of fractional-hop whistlers, combined with the ionosonde measurements at the Ebro observatory in Spain, allows us to derive the density profile in the topside ionosphere.

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Section: Introductionmentioning

confidence: 99%

Propagation of unducted whistlers from their source lightning: A case study

et al. 2009

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“…The ray tracing method is applicable when the duct radius is greater than the characteristic wave-length (Strangeways, 1999). Pasmanik and Trakhtengerts (2005) have studied whistler mode wave propagation in magnetospheric ducts of enhanced cold plasma density for the arbitrary ratio of the duct radius to the whistler wavelength (where the ray tracing method is not applicable). They have showed that in the case of the source exciting simultaneously several duct eigenmodes, the receiver should register the set of discrete signals each corresponding to one of the excited eigenmodes.…”

Section: Ducted Mode Of Propagationmentioning

confidence: 99%

Thunderstorms, Lightning, Sprites and Magnetospheric Whistler-Mode Radio Waves

et al. 2008

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“…Theoretical aspects of the whistler wave propagation in the magnetospheric ducts have been studied for more than half a century using different approaches (see, e.g., (Karpman and Kaufman, 1984;Laids, 1992;Pasmanik and Trakhtengerts, 2005;Sonwalkar, 2006;Woodroffe et al, 2013)). Known experimental data make it possible to define concretely the important characteristics of the geophysical situation.…”

Section: Introductionmentioning

confidence: 99%

Excitation of chorus with small wave normal angles due to BPA mechanism into density ducts

Bespalov

Savina

2019

Preprint

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Abstract. We examine specific features of the realization of the beam pulse amplifier mechanism (BPA) of chorus excitation in the density ducts having a width of the order of 100–300 km with refractive reflection. The dispersion characteristics of whistler emissions in a planar duct under conditions for the fulfillment of the WKB approximation and refractive reflection from the walls of the duct are analyzed. It is shown that in the enhanced duct, discrete spectral elements of chorus with a narrow angular spectrum along the external magnetic field can be excited at frequencies somewhat lower than half the electron cyclotron frequency. In the depleted duct at frequencies somewhat higher than half the electron cyclotron frequency chorus with a narrow angular spectrum along the magnetic field can be excited. The proposed model explains the possibility of excitation of chorus with small angles of the wave normal when the BPA mechanism is implemented. It is noted that the properties of chorus, such as the intensity and a typical angle of the wave normal, can be different for the lower and upper band chorus.

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Dispersion properties of ducted whistlers, generated by lightning discharge

Cited by 22 publications

References 16 publications

Propagation of unducted whistlers from their source lightning: A case study

Propagation of unducted whistlers from their source lightning: A case study

Thunderstorms, Lightning, Sprites and Magnetospheric Whistler-Mode Radio Waves

Excitation of chorus with small wave normal angles due to BPA mechanism into density ducts

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