TY - GEN
T1 - FDTD modeling of ULF waves in the magnetosphere and ionosphere
AU - Waters, C. L.
AU - Sciffer, M. D.
AU - Lysak, R. L.
PY - 2010
Y1 - 2010
N2 - The magnetised plasma of near-Earth space (magnetosphere) supports two ultra-low frequency (ULF ;1-100 mHz), magnetohydrodynamic (MHD) oscillations known as the shear and fast Alfvén wave modes. The fast mode propagates across the ambient magnetic field, spreading ULF wave energy throughout the magnetosphere. For sufficiently large ionosphere conductance, the shear Alfvén mode forms field line resonances (FLRs) between the northern and southern ionospheres. Developing applications for remote sensing the magnetosphere using ULF waves involves an understanding of these resonance modes. While modeling the magnetosphere part of the solution is relatively straightforward, adding the boundary conditions imposed by the ionosphere and at the magnetopause is more challenging. The ionosphere boundary formulation is described in addition to the implementation of an absorbing layer at the outer boundary. This avoids previous unrealistic restrictions at both the inner and outer boundaries of MHD wave models.
AB - The magnetised plasma of near-Earth space (magnetosphere) supports two ultra-low frequency (ULF ;1-100 mHz), magnetohydrodynamic (MHD) oscillations known as the shear and fast Alfvén wave modes. The fast mode propagates across the ambient magnetic field, spreading ULF wave energy throughout the magnetosphere. For sufficiently large ionosphere conductance, the shear Alfvén mode forms field line resonances (FLRs) between the northern and southern ionospheres. Developing applications for remote sensing the magnetosphere using ULF waves involves an understanding of these resonance modes. While modeling the magnetosphere part of the solution is relatively straightforward, adding the boundary conditions imposed by the ionosphere and at the magnetopause is more challenging. The ionosphere boundary formulation is described in addition to the implementation of an absorbing layer at the outer boundary. This avoids previous unrealistic restrictions at both the inner and outer boundaries of MHD wave models.
UR - http://www.scopus.com/inward/record.url?scp=78651326069&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78651326069&partnerID=8YFLogxK
U2 - 10.1109/ICEAA.2010.5653758
DO - 10.1109/ICEAA.2010.5653758
M3 - Conference contribution
AN - SCOPUS:78651326069
SN - 9781424473687
T3 - Proceedings - 2010 12th International Conference on Electromagnetics in Advanced Applications, ICEAA'10
SP - 477
EP - 480
BT - Proceedings - 2010 12th International Conference on Electromagnetics in Advanced Applications, ICEAA'10
T2 - 2010 12th International Conference on Electromagnetics in Advanced Applications, ICEAA'10
Y2 - 20 September 2010 through 24 September 2010
ER -