Total current of the auroral electrojet estimated from the IMS Alaska meridian chain of magnetic observatories

Details Total current of the auroral electrojet estimated from the IMS Alaska meridian chain of magnetic observatories Total current of the auroral electrojet estimated from the IMS Alaska meridian chain of magnetic observatories

Jul 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982p%26ss...30..621k&link_type=abstract

Planetary and Space Science, vol. 30, July 1982, p. 621-625.

Computer Science

9

Auroral Electrojets, Interplanetary Magnetic Fields, Atmospheric Models, Current Density, Magnetic Variations, Magnetometers

Scientific paper

The total westward electrojet across the Alaska meridian is estimated by two methods. First, the ground magnetic perturbation component is integrated using data from 12 stations along the Alaskan meridian and a cubic Spline function to fit the data distribution. The boundaries between areas where the perturbations are negative are determined to define the region of integration. A second method involves the forward model, wherein the ionosphere from 61-82 deg latitude is divided into 3 deg wide current rings which are each subdivided longitudinally into 24 cells. Each cell is assigned an E-W and a N-S current and the equatorward and poleward boundaries of the westward electrojet are found for integration of the total current along the meridian. Using the perturbation integration method is shown to be reliable without dependence on the Z-component for defining boundaries, while the forward model requires it.

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