Physics
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ge%26ae..22..159p&link_type=abstract
Geomagnetizm i Aeronomiia, vol. 22, Jan.-Feb. 1982, p. 159-161. In Russian.
Physics
Atmospheric Models, Auroral Electrojets, Magnetic Disturbances, Geoelectricity, Harmonic Analysis, Time Response, Vertical Distribution
Scientific paper
An analysis is presented of a polar electrojet field which produces a baylike disturbance above a medium with finite conductivity, and attention is given to errors that can arise when an idealized conductivity model is used to take into account induction in the earth. It is shown that the finite conductivity of the medium leads to a dependence of the induction coefficients on both the distance to the source and the phase of the bay. This time dependence can be taken into account by a finite-conductor model, whose depth increases with time. Such a model can approximately describe induction in the actual earth, but it is also necessary to take into account the increase with time of the 'effective' thickness of the insulator. In this case, the joint use of Z and H profiles makes it possible to determine the parameters of even a distant electrojet.
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