The University of Southampton
University of Southampton Institutional Repository

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
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
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, 1497-1515.

Record type: Article

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.

Text
jatp_98_baba.pdf - Other
Download (1MB)

More information

Published date: 1998
Keywords: VLF Trimpi, Finite element modelling, 3D Born modelling
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 251937
URI: https://eprints.soton.ac.uk/id/eprint/251937
PURE UUID: af6d4973-f71a-4b5c-9552-518b5c6a1b2b

Catalogue record

Date deposited: 31 May 2000
Last modified: 22 Oct 2018 16:33

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×