Authors / CoAuthors
Lewis, A. | Gard, M.
Abstract
<div>AGRF25 is a regional magnetic field model for Australia covering the interval 2020-2030. </div><div>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.</div><div><br></div><div>Included with the dataset is evaluation software:</div><div>README.TXT: This text file of information</div><div><br></div><div>AGRF25S.FOR: Source code of a main program for generating AGRF25 values</div><div> at a sequence of single sites. The program may also be used to</div><div> generate values of the International Geomagnetic Reference Field, </div><div> revision 14 for epochs after 2025.0</div><div><br></div><div>AGRF25S.EXE: A Windows console application of program AGRF25S</div><div><br></div><div>AGRF25G.FOR: Source code of a main program for generating AGRF25 values</div><div> for a single field element on a latitude-longitude grid at </div><div> a constant altitude</div><div><br></div><div>AGRF25G.EXE: A Windows console application of program AGRF25G</div><div><br></div><div>AGRF25LB.FOR: Source code for subroutines called by the main programs.</div><div><br></div><div>COEF25: A data file of model coefficients and parameters.</div><div><br></div><div>GRID2GEO.FOR: Source code of a program to convert Universal Transverse</div><div> Mercator Easting and Northings to geodetic latitude and longitude</div><div><br></div><div>GRID2GEO.EXE: A Windows console application of GRID2GEO</div><div><br></div><div>GEO2GRID.FOR: Source code of a program to convert geodetic latitude and </div><div> longitude to UTM Easting and Northings</div><div><br></div><div>GEO2GRID.EXE: A Windows console application of GEO2GRID</div><div><br></div><div>SPHEROID.TXT: A text data file of geodetic spheroid parameters, </div><div> used by GRID2GEO and GEO2GRID</div>
Product Type
dataset
eCat Id
150056
Contact for the resource
Resource provider
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Point of contact
Digital Object Identifier
Keywords
-
- geomagnetism
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- magnetic field
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- 2025
- theme.ANZRC Fields of Research.rdf
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- Magnetism and Palaeomagnetism
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- Published_External
Publication Date
2025-01-23T01:08:49
Creation Date
2024-12-07T11:00:00
Security Constraints
Legal Constraints
Status
completed
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.
Maintenance Information
asNeeded
Topic Category
geoscientificInformation
Series Information
Lineage
<div>This is an independent model for the period 2020-2030 and is revised on 5 yearly cycle.</div>
Parent Information
Extents
[-90.00, -9.00, 45.00, 168.00]
Reference System
WGS 84 / geographic 2D (EPSG: 4326)
Spatial Resolution
Service Information
Associations
Source Information