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.<br>Included with the dataset is evaluation software:README.TXT: This text file of information<br>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<br>AGRF25S.EXE: A Windows console application of program AGRF25S<br>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<br>AGRF25G.EXE: A Windows console application of program AGRF25G<br>AGRF25LB.FOR: Source code for subroutines called by the main programs.<br>COEF25: A data file of model coefficients and parameters.<br>GRID2GEO.FOR: Source code of a program to convert Universal Transverse Mercator Easting and Northings to geodetic latitude and longitude<br>GRID2GEO.EXE: A Windows console application of GRID2GEO<br>GEO2GRID.FOR: Source code of a program to convert geodetic latitude and longitude to UTM Easting and Northings<br>GEO2GRID.EXE: A Windows console application of GEO2GRID<br>SPHEROID.TXT: A text data file of geodetic spheroid parameters, used by GRID2GEO and GEO2GRID