VLF Trimpi modelling on the path NWC-Dunedin using both finite element and 3D Born modelling
VLF Trimpi modelling on the path NWC-Dunedin using both finite element and 3D Born modelling
This paper investigates the numerical modelling of VLF Trimpis produced by a D region inhomogeneity on the Great Circle Path . Two different codes are used. The first is a 2D finite element method (FEM) code , whose solutions are rigorous and valid in the strong scattering or non-Born limit. The second code is a fully 3D model that invokes the Born approximation. The predicted Trimpis from these codes compare closely, thus confirming the validity of both models. The modal scattering matrices have a comparable structure, and indicate strong scattering between the dominant TM modes. Analysis of the scattering matrix from the FEM code delineates the Born regime. For a LIE with a radius of 100kms, the Born approximation becomes invalid at an electron density perturbation of about 8 el/cc.
VLF Trimpi, Finite element modelling, 3D Born modelling
1497-1515
Nunn, D
5115be8c-b699-427b-b7df-8795398381e5
Baba, K
aa70c4ae-e9cf-48a0-87ea-71ddcac22738
Hayakawa, M
ccc31078-38f1-4680-b53d-99bd0868ac0d
1998
Nunn, D
5115be8c-b699-427b-b7df-8795398381e5
Baba, K
aa70c4ae-e9cf-48a0-87ea-71ddcac22738
Hayakawa, M
ccc31078-38f1-4680-b53d-99bd0868ac0d
Nunn, D, Baba, K and Hayakawa, M
(1998)
VLF Trimpi modelling on the path NWC-Dunedin using both finite element and 3D Born modelling.
Journal of Atmospheric and Terrestrial Physics, 60, .
Abstract
This paper investigates the numerical modelling of VLF Trimpis produced by a D region inhomogeneity on the Great Circle Path . Two different codes are used. The first is a 2D finite element method (FEM) code , whose solutions are rigorous and valid in the strong scattering or non-Born limit. The second code is a fully 3D model that invokes the Born approximation. The predicted Trimpis from these codes compare closely, thus confirming the validity of both models. The modal scattering matrices have a comparable structure, and indicate strong scattering between the dominant TM modes. Analysis of the scattering matrix from the FEM code delineates the Born regime. For a LIE with a radius of 100kms, the Born approximation becomes invalid at an electron density perturbation of about 8 el/cc.
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jatp_98_baba.pdf
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Published date: 1998
Keywords:
VLF Trimpi, Finite element modelling, 3D Born modelling
Organisations:
Electronics & Computer Science
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Local EPrints ID: 251937
URI: http://eprints.soton.ac.uk/id/eprint/251937
PURE UUID: af6d4973-f71a-4b5c-9552-518b5c6a1b2b
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Date deposited: 31 May 2000
Last modified: 14 Mar 2024 05:14
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Author:
D Nunn
Author:
K Baba
Author:
M Hayakawa
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