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 informationAGRF25S.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 2025.0AGRF25S.EXE: A Windows console application of program AGRF25SAGRF25G.FOR: Source code of a main program for generating AGRF25 values    for a single field element on a latitude-longitude grid at     a constant altitudeAGRF25G.EXE: A Windows console application of program AGRF25GAGRF25LB.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 longitudeGRID2GEO.EXE: A Windows console application of GRID2GEOGEO2GRID.FOR: Source code of a program to convert geodetic latitude and     longitude to UTM Easting and NorthingsGEO2GRID.EXE: A Windows console application of GEO2GRIDSPHEROID.TXT: A text data file of geodetic spheroid parameters,     used by GRID2GEO and GEO2GRID