Release of the Australian Geomagnetic Reference Field, 1985

Abstract

The Australian Geomagnetic Reference Field, 1985 (AGRF1985) is now available as a software package. It is supplied as a main-frame version on 1/2-inch magnetic tape and also as an MS-DOS version on a 51/4-inch floppy disk for IBM PC's and compatibles. The package comprises full documentation, a set of general-purpose subroutines and a main program for generating AGRF1985 at either a single station or at a set of grid points within the Australian region. Options are included for computing values of IGRF1985 (the International Geomagnetic Reference Field), or IGRF1985 extrapolated using the AGRF1985 secular variation model, or differences between AGRF1985 and IGRF1985 (termed the "regional residual field").