Brief Description:
This is a simple analytical model based on a quasi-static electric potential
field. An electric convection potential is introduced within the auroral zone.
Semi-empirical analytical expressions are given for the horizontal components
of the ionospheric electric field at all latitudes and local times. They are
arranged to fit most general features of electric fields observed by
polar-orbiting satellites. Magnetospheric electric fields are derived assuming
a static magnetic dipole field and no parallel electric field. The model uses
18 coefficients. Two sets of coefficients are given, one for low and one for
moderate geomagnetic activity.
References:
H. Volland, Models of the Global Electric Fields Within the Magnetosphere, Am.
Geophys. 31, 159, 1975.
H. Volland, A Model of the Magnetospheric Electric Convection Field, J. Geophys. Res. 83, 2695, 1978.
H. Volland, Semi-Empirical Models of Magnetospheric Electric Fields, pp. 261-280, in: Quantitative Modeling of Magnetospheric Processes, W. P. Olson (ed.), American Geophysical Union, Washington, D.C., 1979.
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NASA Official: Dr. Robert McGuire, Head of the Space Physics Data Facility