This data set consists of a set of subroutines designed to calculate the magnetic field of the Earth from -40 Earth radii to +10 Earth radii. The coefficients are calculated assuming the axis of the Earth's dipole is perpendicular to the Earth-Sun line. The magnetic potential was obtained by integrating over a model magnetotail current system and fitting the surface field to a set of Bessel functions.
Availability: On one tape as provided by author (NSSDC ID #MG-24A)
D. B. Beard, The Magnetotail Magnetic Field, J. Geophys. Res. 84, 2118, 1979.
NASA Official: Dr. Robert McGuire, Head of the Space Physics Data Facility