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Spherical cap harmonic analysis of magnetic variations data from mainland Australia
2008
Earth, Planets and Space
Spherical cap harmonic analysis (SCHA) has been applied to geomagnetic data from an array of magnetometers deployed across the Australian mainland during 1989-90 in order to examine features of the ionospheric S q current system. The external contours, corresponding to ionospheric currents, are generally in good agreement with the data in that the direction of current flow is perpendicular to the measured horizontal magnetic field. The derived internal (induced) current systems are less
doi:10.1186/bf03352875
fatcat:hraeh7zocvdizh4b66ghrvgwfi