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The World Magnetic Model
The World Magnetic Model is a joint product of the United States’ National
Geospatial-Intelligence Agency (NGA) and the United Kingdom’s Defence Geographic Centre
(DGC). The WMM was developed jointly by the National Geophysical Data Center (NGDC, Boulder
CO, USA) (now the National Centers for Environmental Information (NCEI)) and the British
Geological Survey (BGS, Edinburgh, Scotland). |
The World Magnetic Model is the standard model used by the U.S. Department of
Defense, the U.K. Ministry of Defence, the North Atlantic Treaty Organization (NATO) and the
International Hydrographic Organization (IHO), for navigation, attitude and heading referencing
systems using the geomagnetic field. It is also used widely in civilian navigation and heading
systems. The model, associated software, and documentation are distributed by NCEI on behalf of
NGA. The model is produced at 5-year intervals, with the current model expiring on December 31,
2019.
WMM2015v2 Release
The full release of the out-of-cycle WMM (WMM2015v2) is now available. All WMM products and services have been updated. This new model addresses the degraded performance of WMM2015 in the Arctic region and supersedes it.
Please contact [email protected] for
comments or questions.
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