scholarly journals Whistler propagation in nonsymmetrical density channels

2007 ◽  
Vol 112 (A6) ◽  
pp. n/a-n/a ◽  
Author(s):  
A. V. Streltsov ◽  
M. Lampe ◽  
G. Ganguli
Keyword(s):  
Whistler Propagation

scholarly journals LHR effects in nonducted whistler propagation – new observations and numerical modelling

2001 ◽  
Vol 19 (2) ◽  
pp. 147-157 ◽  
Author(s):  
F. Jiřiček ◽  
D. R. Shklyar ◽  
P. Třiska
Keyword(s):  
Wave Propagation ◽  
Numerical Modelling ◽  
Plasma Frequency ◽  
Cutoff Frequency ◽  
Lower Hybrid ◽  
Noise Band ◽  
Maximum Value ◽  
Lower Hybrid Resonance ◽  
Whistler Propagation ◽  
Lower Cutoff

Abstract. VLF-ELF broadband measurements onboard the MAGION 4 and 5 satellites at heights above 1 Re in plasmasphere provide new data on various known phenomena related to ducted and nonducted whistler wave propagation. Two examples are discussed: magnetospherically reflected (MR) whistlers and lower hybrid resonance (LHR) noise band. We present examples of rather complicated MR whistler spectrograms not reported previously and argue the conditions for their generation. Analytical consideration, together with numerical modelling, yield understanding of the main features of those spectrograms. LHR noise band, as well as MR whistlers, is a phenomenon whose source is the energy propagating in the nonducted way. At the plasmaspheric heights, where hydrogen (H+) is the prevailing ion, and electron plasma frequency is much larger than gyrofrequency, the LHR frequency is close to its maximumvalue in a given magnetic field. This frequency is well followed by the observed noise bands. The lower cutoff frequency of this band is somewhat below that maximum value. The reason for this, as well as the possibility of using the LHR noise bands for locating the plasma through position, are discussed.Key words. Magnetospheric physics (plasmasphere; wave propagation)

Influence of collisions on whistler propagation

1965 ◽  
Vol 1 (3) ◽  
pp. 54 ◽  
Author(s):  
P. Hedvall ◽  
L. Sjögren
Keyword(s):  
Whistler Propagation

scholarly journals Whistler propagation in ionospheric density ducts: Simulations and DEMETER observations

2013 ◽  
Vol 118 (11) ◽  
pp. 7011-7018 ◽  
Author(s):  
J. R. Woodroffe ◽  
A. V. Streltsov ◽  
A. Vartanyan ◽  
G. M. Milikh
Keyword(s):  
Whistler Propagation

scholarly journals Whistler propagation in the plasmapause

2013 ◽  
Vol 118 (2) ◽  
pp. 716-723 ◽  
Author(s):  
J.R. Woodroffe ◽  
A.V. Streltsov
Keyword(s):  
Whistler Propagation

Theory of whistler propagation

1969 ◽  
Vol 12 (1) ◽  
pp. 35-42
Author(s):  
Yu. G. Spiridonov
Keyword(s):  
Whistler Propagation

The propagation of very low-frequency radio waves in ducts in the magnetosphere

1971 ◽  
Vol 321 (1544) ◽  
pp. 69-93 ◽  
Keyword(s):  
Electron Density ◽  
Low Frequency ◽  
Electron Density Profile ◽  
Radio Waves ◽  
Order Mode ◽  
Inhomogeneous Wave ◽  
Ionization Density ◽  
Barrier Region ◽  
Uniform Medium ◽  
Whistler Propagation

A method is developed to calculate waveguide modes in a plane stratified duct of enhanced or reduced ionization density in an otherwise uniform magneto-ionic medium. It may in principle be applied to ducts with an arbitrary electron density profile, and with dimensions of the order of the wavelength in the medium. Computations are carried out for one simple model with enhanced ionization density and parameters typical of whistler propagation. The fields inside and outside the duct are discussed. It is shown that the energy flux in the inhomogeneous wave outside the physical boundaries of the duct may in certain circumstances be important. The types of waveguide mode which may occur are discussed. In particular there is one mode called the zero-order mode which always propagates even when the duct is very narrow or when the electron density in the duct differs only infinitesimally from that in the uniform medium outside. In the limit where the duct no longer exists this mode becomes a plane wave. When the axis of the duct is curved and there are transverse gradients of ionization density and of magnetic field in the medium outside the duct, all modes may tunnel through a barrier region, in which the wave is evanescent, to a region where the energy is refracted away from the duct. Consideration of this process leads to a criterion for deciding whether a duct is sufficiently strong to maintain guiding.

Ionospheric whistler propagation

1978 ◽  
Vol 40 (2) ◽  
pp. 215-221 ◽  
Author(s):  
R.J Thomson ◽  
R.L Dowden
Keyword(s):  
Whistler Propagation
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