Estimation of Electric Fields and Currents from Ground-Based Magnetometer Data
- Thomas A. Potemra
Published Online: 21 MAR 2013
Copyright 1984 by the American Geophysical Union.
How to Cite
Kamide, Y. and Richmond, A. D. (1984) Estimation of Electric Fields and Currents from Ground-Based Magnetometer Data, in Magnetospheric Currents (ed T. A. Potemra), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM028p0067
- Published Online: 21 MAR 2013
- Published Print: 1 JAN 1984
Print ISBN: 9780875900551
Online ISBN: 9781118664131
- Magnetospheric currents—Congresses;
- Plasma instabilities—Congresses
We review and evaluate recent advances in numerical algorithms for estimating ionospheric electric fields and currents from groundbased magnetometer data. Tests of the adequacy of one such algorithm in reproducing large-scale patterns of electrodynamic parameters in he high-latitude ionosphere have yielded generally positive results, at least for some simple cases. We point out some encouraging advances in producing realistic conductivity models, which are a critical input. When the algorithms are applied to extensive data sets, such as the ones from meridian chain magnetometer networks during the IMS, together with refined conductivity models, unique information on instantaneous electric field and current patterns can be obtained. Examples of electric potentials, ionospheric currents, field-aligned currents, and Joule heating distributions derived from ground magnetic data are presented. Possible directions for future improvements are also pointed out.