2 options
The world magnetic model / National Geospatial-Intelligence Agency (NGA).
- Format:
- Government document
- Website/Database
- Language:
- English
- Subjects (All):
- Geomagnetism--Mathematical models.
- Geomagnetism.
- Spherical harmonics.
- Navigation.
- Magnetic pole.
- Earth sciences.
- Genre:
- Online resources.
- Physical Description:
- 1 online resource
- Updated every five years
- Other Title:
- WMM
- Place of Publication:
- [Springfield, Va.] : National Geospatial-Intelligence Agency (NGA)
- Summary:
- "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."
- Notes:
- "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)."
- Version WMM2025, released on December 17, 2024 (viewed Jan. 31, 2025) (NGDC); title from HTML caption.
- OCLC:
- 1084479728
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