Modeling VLF propagation in the Earth-ionosphere waveguide using the discontinuous Galerkin method

Author

Foust, Forrest ; Bell, Timothy ; Inan, Umran

Author_Institution

Electr. Eng. Dept., Stanford Univ., Stanford, CA, USA

fYear

2011

fDate

13-20 Aug. 2011

Firstpage

1

Lastpage

4

Abstract

Modeling of scattering of very low frequency (VLF, 3-30 kHz) waves from ionospheric disturbances remains a significant computational challenge due to the strong inhomogeneity and anisotropy naturally present at these frequencies. The discontinuous Galerkin (DG) method on unstructured grids can lead to to very efficient formulations in strongly inhomogeneous materials. We discuss a generic method to incorporate any linear, frequency-dependent permittivity or permeability in the nodal DG framework (including PMLs, ferrites, and cold plasmas) and apply the resulting scheme to modeling the VLF scattered field from a density perturbation in the lower ionosphere.

Keywords

Galerkin method; ionospheric disturbances; ionospheric electromagnetic wave propagation; Earth-ionosphere waveguide; VLF propagation modeling; VLF scattered field; density perturbation; discontinuous Galerkin method; frequency-dependent permeability; frequency-dependent permittivity; ionospheric disturbances; nodal DG framework; very low frequency scattering; Finite difference methods; Moment methods; Nonhomogeneous media; Plasmas; Polynomials; Scattering; Tensile stress;

fLanguage

English

Publisher

ieee

Conference_Titel

General Assembly and Scientific Symposium, 2011 XXXth URSI

Conference_Location

Istanbul

Print_ISBN

978-1-4244-5117-3

Type

conf

DOI

10.1109/URSIGASS.2011.6051051

Filename

6051051