Data

Australian Geomagnetic Reference Field 2025 Revision (AGRF25)

Geoscience Australia
Lewis, A. ; Gard, M.
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://pid.geoscience.gov.au/dataset/ga/150056&rft.title=Australian Geomagnetic Reference Field 2025 Revision (AGRF25)&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/150056&rft.publisher=Commonwealth of Australia (Geoscience Australia)&rft.description=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 GEO2GRIDMaintenance and Update Frequency: asNeededStatement: This is an independent model for the period 2020-2030 and is revised on 5 yearly cycle.&rft.creator=Lewis, A. &rft.creator=Gard, M. &rft.date=2024&rft.coverage=westlimit=45.00; southlimit=-90.00; eastlimit=168.00; northlimit=-9.00; projection=WGS 84 / geographic 2D (EPSG: 4326)&rft.coverage=westlimit=45.00; southlimit=-90.00; eastlimit=168.00; northlimit=-9.00; projection=WGS 84 / geographic 2D (EPSG: 4326)&rft_rights=&rft_rights=Creative Commons Attribution 4.0 International Licence&rft_rights=CC-BY&rft_rights=4.0&rft_rights=http://creativecommons.org/licenses/&rft_rights=© Commonwealth of Australia (Geoscience Australia) 2025&rft_rights=Australian Government Security Classification System&rft_rights=https://www.protectivesecurity.gov.au/Pages/default.aspx&rft_rights=WWW:LINK-1.0-http--link&rft_rights=Australian Government Security Classification System&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/by/4.0&rft_subject=geoscientificInformation&rft_subject=geomagnetism&rft_subject=magnetic field&rft_subject=2025&rft_subject=Magnetism and Palaeomagnetism&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data
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Creative Commons Attribution 4.0 International Licence
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Creative Commons Attribution 4.0 International Licence

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4.0

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© Commonwealth of Australia (Geoscience Australia) 2025

Australian Government Security Classification System

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Australian Government Security Classification System

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Brief description

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

Lineage

Maintenance and Update Frequency: asNeeded
Statement:
This is an independent model for the period 2020-2030 and is revised on 5 yearly cycle.

Notes

Purpose
AGRF25 is developed for use within the interval 2020 to 2030 and supercedes AGRF20 over the period 2020-2025. AGRF25 is defined as the vector sum of IGRF-14 at 2025 and the "regional residual field (RRF25) for the main field and its predicted annual change. AGRF25 is based on a comprehensive set of vector magnetic field data from the region, including magnetic observatory and repeat station data, Geoscience Australia third-order ground vector survey, the US Navy high elevation airborne Project Magnet and data from the European Space Agencies' SWARM constellation, satellites A and B.This extensive regional data set used in the spherical cap harmonic modelling allow the AGRF25 to be considered the best available model for the Australian regional magnetic field for the interval 2020-2030.

Created: 07 12 2024

Issued: 23 01 2025

Data time period: 2020-01-01 to 2029-12-31

This dataset is part of a larger collection

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168,-9 168,-86 45,-86 45,-9 168,-9

106.5,-49.5

text: westlimit=45.00; southlimit=-90.00; eastlimit=168.00; northlimit=-9.00; projection=WGS 84 / geographic 2D (EPSG: 4326)

Subjects
2025 | Magnetism and Palaeomagnetism | Published_External | geomagnetism | geoscientificInformation | magnetic field |

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uri : https://d28rz98at9flks.cloudfront.net/150056/150056_00_0.zip

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