Computer Physics Communications Program LibraryPrograms in Physics & Physical Chemistry |

[Licence| Download | New Version Template] aaec_v1_0.gz(3 Kbytes) | ||
---|---|---|

Manuscript Title: Geomagnetic field models: scalar and vector potential, induction
vector and its gradient tensor computed by a common algorithm. | ||

Authors: G. Kluge | ||

Program title: MAGNES | ||

Catalogue identifier: AAEC_v1_0Distribution format: gz | ||

Journal reference: Comput. Phys. Commun. 4(1972)347 | ||

Programming language: Fortran. | ||

Computer: IBM 360/65. | ||

Operating system: OS 360. | ||

RAM: 1K words | ||

Word size: 32 | ||

Keywords: Geophysics, Space science, Geomagnetic field, Potential theory, Harmonic polynomials, Spherical harmonics, Stokes theorem, Vector potential, Inverse radii. | ||

Classification: 13. | ||

Nature of problem:The program has been written for handling phenomenological models of the geomagnetic field; it can be adapted to any spherical harmonic expansion of potentials (e.g. gravitational or electrostatic). | ||

Solution method:The scalar potential is expressed as a harmonic polynomial in terms of Cartesian coordinates with reciprocal radius. Derivatives of any order can be simply calculated in a way similar to Horner's procedure. This results in a unified algorithm for the various fields quantities and also facilitates the generation and use of local approximations to field models. | ||

Running time:For a field model of degree 8 (i.e. 80 coefficients): 3 ms for the scalar and vector potential, additional 3 ms for the induction vector, further 3 ms for the gradient tensor. |

Disclaimer | ScienceDirect | CPC Journal | CPC | QUB |