The Modelling of VLF Trimpis using both Finite Element and 3D Born modelling
Baba, K, Nunn, D and Hayakawa, M (1998) The Modelling of VLF Trimpis using both Finite Element and 3D Born modelling. Geophysical Research Letters, 25, (24), 4453-4456.
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.
|Keywords:||VLF Trimpis; Finite elements; Born modelling|
|Divisions:||Faculty of Physical and Applied Science > Electronics and Computer Science
|Date Deposited:||08 Mar 2004|
|Last Modified:||01 Mar 2012 10:58|
|Contributors:||Baba, K (Author)
Nunn, D (Author)
Hayakawa, M (Author)
|Publisher:||American Geophysical Union|
|Further Information:||Google Scholar|
|ISI Citation Count:||8|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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