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Lhr Effects in Nonducted Whistler Propagation – New Observations and Numerical Modelling : Volume 19, Issue 2 (30/11/-0001)

By Jiřiček, F.

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Book Id: WPLBN0004000825
Format Type: PDF Article :
File Size: Pages 11
Reproduction Date: 2015

Title: Lhr Effects in Nonducted Whistler Propagation – New Observations and Numerical Modelling : Volume 19, Issue 2 (30/11/-0001)  
Author: Jiřiček, F.
Volume: Vol. 19, Issue 2
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
-0001
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Shklyar, D. R., Třiska, P., & Jiřiček, F. (-0001). Lhr Effects in Nonducted Whistler Propagation – New Observations and Numerical Modelling : Volume 19, Issue 2 (30/11/-0001). Retrieved from http://www.ebooklibrary.org/


Description
Description: Institute of Atmospheric Physics, Acad. Sci. Czech Republic, Boční II, 141 31 Prague 4, Czech Republic. 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)


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

 

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