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Numerical Computations of Terrestrial ELF Electromagnetic Wave Fields in the Frequency Domain
Author(s) -
Jones D. Llanwyn
Publication year - 1970
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs005i005p00803
Subject(s) - ionosphere , physics , isotropy , computational physics , computation , dipole , electric field , frequency domain , electromagnetic field , series (stratigraphy) , geophysics , optics , mathematical analysis , geology , mathematics , algorithm , quantum mechanics , paleontology
The zero‐order term of the residue series has been employed to calculate the variation of field strength with distance over the earth's surface in the frequency band 7.8 Hz to 1 kHz. Spherical symmetry is assumed for the earth and ionosphere. The ionosphere is taken to be isotropic, but radial inhomogeneity is allowed. A vertical electric dipole source and a realistic propagation‐constant model were assumed. The computations indicate the accuracy of the usual approximations to the residue series and enable the magnitude of the standing wave effects in the earth‐ionosphere cavity to be assessed.