Australian Geomagnetic Reference Field 2025 Revision (AGRF25)

AGRF25 is a regional magnetic field model for Australia covering the interval 2020-2030.  The Australian Geomagnetic Reference Field (AGRF) is a set of numerical models of the geomagnetic field for Australia and near-neighbouring regions. It represents a combination of the Earth's main field originating from the core and the broad-scale crustal field. AGRF describes the geomagnetic field on a regional scale, intermediate between the global scale of the International Geomagnetic Reference Field (IGRF) and the local scale provided by detailed ground and aeromagnetic surveys.

Included with the dataset is evaluation software: README.TXT: This text file of information

AGRF25S.FOR: Source code of a main program for generating AGRF25 values     at a sequence of single sites. The program may also be used to     generate values of the International Geomagnetic Reference Field,      revision 14 for epochs after 2025.0

AGRF25S.EXE: A Windows console application of program AGRF25S

AGRF25G.FOR: Source code of a main program for generating AGRF25 values     for a single field element on a latitude-longitude grid at      a constant altitude

AGRF25G.EXE: A Windows console application of program AGRF25G

AGRF25LB.FOR: Source code for subroutines called by the main programs.

COEF25:  A data file of model coefficients and parameters.

GRID2GEO.FOR: Source code of a program to convert Universal Transverse     Mercator Easting and Northings to geodetic latitude and longitude

GRID2GEO.EXE: A Windows console application of GRID2GEO

GEO2GRID.FOR: Source code of a program to convert geodetic latitude and      longitude to UTM Easting and Northings

GEO2GRID.EXE: A Windows console application of GEO2GRID

SPHEROID.TXT: A text data file of geodetic spheroid parameters,      used by GRID2GEO and GEO2GRID