Effects of equatorial chorus wave normal azimuthal distribution on wave propagation
The non-ducted propagation characteristics of the VLF waves in the inner magnetosphere were studied with respect to their frequency, source localization, and initial polar angle between the wave-normal and the background magnetic field and azimuthal angle. The ray tracing software based on multi-com...
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| Опубліковано в: : | Advances in Astronomy and Space Physics |
|---|---|
| Дата: | 2012 |
| Автори: | , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Головна астрономічна обсерваторія НАН України
2012
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| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/119393 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Effects of equatorial chorus wave normal azimuthal distribution on wave propagation / H. Breuillard, D.I. Mendzhul, O.V. Agapitov // Advances in Astronomy and Space Physics. — 2012. — Т. 2., вип. 2. — С. 167-172. — Бібліогр.: 31 назв. — англ. |
Репозитарії
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nasplib_isofts_kiev_ua-123456789-119393 |
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| spelling |
Breuillard, H. Mendzhul, D.I. Agapitov, O.V. 2017-06-06T18:23:09Z 2017-06-06T18:23:09Z 2012 Effects of equatorial chorus wave normal azimuthal distribution on wave propagation / H. Breuillard, D.I. Mendzhul, O.V. Agapitov // Advances in Astronomy and Space Physics. — 2012. — Т. 2., вип. 2. — С. 167-172. — Бібліогр.: 31 назв. — англ. 2227-1481 https://nasplib.isofts.kiev.ua/handle/123456789/119393 The non-ducted propagation characteristics of the VLF waves in the inner magnetosphere were studied with respect to their frequency, source localization, and initial polar angle between the wave-normal and the background magnetic field and azimuthal angle. The ray tracing software based on multi-components cold plasma approach was developed by use of the Olson-Pfitzer magnetic field model and the GCPM model of plasma density. We described dynamics of the wave-normals direction during its propagation and magnetospheric reflection. We showed that whistler waves can be reflected when lower hybrid resonance frequency becomes greater than the wave frequency: ωLH > ω. It corresponds to magnetic latitude λ ∼ 50°. The simulation results confirmed the inapplicability of the quasi-longitudinal approximation to describe the propagation of magnetospheric whistlers. The simulation results of chorus emissions propagation, which use realistic distributions of waves on the initial parameters are presented. Particularly, we obtained distributions of chorus emission waves in dependence on the wave-normal directions for different magnetic latitudes, with respect to initial azimuthal angle. It is required for studying diffusive processes in the radiation belts. The results are found to be in a good agreement with the CLUSTER STAFF-SA measurements. en Головна астрономічна обсерваторія НАН України Advances in Astronomy and Space Physics Effects of equatorial chorus wave normal azimuthal distribution on wave propagation Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Effects of equatorial chorus wave normal azimuthal distribution on wave propagation |
| spellingShingle |
Effects of equatorial chorus wave normal azimuthal distribution on wave propagation Breuillard, H. Mendzhul, D.I. Agapitov, O.V. |
| title_short |
Effects of equatorial chorus wave normal azimuthal distribution on wave propagation |
| title_full |
Effects of equatorial chorus wave normal azimuthal distribution on wave propagation |
| title_fullStr |
Effects of equatorial chorus wave normal azimuthal distribution on wave propagation |
| title_full_unstemmed |
Effects of equatorial chorus wave normal azimuthal distribution on wave propagation |
| title_sort |
effects of equatorial chorus wave normal azimuthal distribution on wave propagation |
| author |
Breuillard, H. Mendzhul, D.I. Agapitov, O.V. |
| author_facet |
Breuillard, H. Mendzhul, D.I. Agapitov, O.V. |
| publishDate |
2012 |
| language |
English |
| container_title |
Advances in Astronomy and Space Physics |
| publisher |
Головна астрономічна обсерваторія НАН України |
| format |
Article |
| description |
The non-ducted propagation characteristics of the VLF waves in the inner magnetosphere were studied with respect to their frequency, source localization, and initial polar angle between the wave-normal and the background magnetic field and azimuthal angle. The ray tracing software based on multi-components cold plasma approach was developed by use of the Olson-Pfitzer magnetic field model and the GCPM model of plasma density. We described dynamics of the wave-normals direction during its propagation and magnetospheric reflection. We showed that whistler waves can be reflected when lower hybrid resonance frequency becomes greater than the wave frequency: ωLH > ω. It corresponds to magnetic latitude λ ∼ 50°. The simulation results confirmed the inapplicability of the quasi-longitudinal approximation to describe the propagation of magnetospheric whistlers. The simulation results of chorus emissions propagation, which use realistic distributions of waves on the initial parameters are presented. Particularly, we obtained distributions of chorus emission waves in dependence on the wave-normal directions for different magnetic latitudes, with respect to initial azimuthal angle. It is required for studying diffusive processes in the radiation belts. The results are found to be in a good agreement with the CLUSTER STAFF-SA measurements.
|
| issn |
2227-1481 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/119393 |
| citation_txt |
Effects of equatorial chorus wave normal azimuthal distribution on wave propagation / H. Breuillard, D.I. Mendzhul, O.V. Agapitov // Advances in Astronomy and Space Physics. — 2012. — Т. 2., вип. 2. — С. 167-172. — Бібліогр.: 31 назв. — англ. |
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| first_indexed |
2025-12-07T18:51:57Z |
| last_indexed |
2025-12-07T18:51:57Z |
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