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Manuscript Title: Numerical fits for the geomagnetic shell parameter.
Authors: G. Kluge, K.G. Lenhart
Program title: INTEL
Catalogue identifier: AAEB_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 3(1972)36
Programming language: Fortran.
Computer: IBM 360-65.
Operating system: 0S/360.
RAM: 3K words
Word size: 32
Keywords: Geophysics, Space science, Geomagnetic field, Trapped radiation, Fourier series, Interpolation.
Classification: 13.

Subprograms used:
Cat Id Title Reference
AAEA_v1_0 SHELL CPC 3(1972)31

Nature of problem:
The magnetic coordinates B and L are adiabatic invariants of the motion of charged particles trapped in the magnetic field of the earth and, therefore, convenient for correlating measured particle fluxes.

Solution method:
The shell parameter is represented by Fourier series and interpolation. Several hundred parameters are fitted to data obtained from direct computation. The rms error of the fit is about 0.05%.

Running time:
12 ms to compute B and L.