The World Magnetic Model (WMM) is the standard model for navigation, attitude, and heading referencing systems that use the geomagnetic field. The WMM is also used for civilian applications, including navigation and heading systems. A new version of the model is updated every five years to address changes in Earth’s magnetic field.

2024年12月17日 · The WMM is key to global navigation, ensuring that technological systems relying on the Earth’s magnetic field operate correctly. The World Magnetic Model 2025 (WMM2025) provides more precise navigational data for all military and civilian planes, ships, submarines, and GPS units.

2024年12月17日 · 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.

Magnetic declination map at sea-level for the year 2010 derived from WMM2010. The World Magnetic Model (WMM) is a large spatial-scale representation of the Earth's magnetic field. It was developed jointly by the US National Geophysical Data Center and the British Geological Survey.

2019年12月10日 · About WMM. Learn more about model derivation, uncertainties and magnetic poles. Model & Software. Download model coefficients, software and documentation. Online Calculators. Calculate magnetic field values at or near the Earth surface. Maps. Browse imagery and contour maps for main field and secular change. Uses of WMM. Common applications of ...

Use the tool below to compute values for the geomagnetic field and secular variation for a given set of coordinates and date. This calculator uses the World Magnetic Model as released in Dec 2024.

The world maps of all the components of the geomagnetic field, calculated from the latest WMM model (WMM2015) are available for at the WMM home page (click the map on the lower left). Use the IAGA Web Image Spreadsheet Tool (Wist) to display and download IGRF magnetic field maps and data from 1900 - 2015.

The World Magnetic Model High Resolution (WMMHR) is an advanced geomagnetic field model that provides a more detailed, accurate depiction of the geomagnetic field than the World Magnetic Model (WMM). WMMHR2025 includes core field and secular variation coefficients for degrees n = 1 to 15.

2019年12月17日 · The WMM is the standard model used by DoD, NATO, and IHO for a wide range of positional and navigation systems. WMM2020 is valid from December 10, 2019 through December 31, 2024. NGA releases World Magnetic Model 2020 update, defines blackout zones

The World Magnetic Model High Resolution (WMMHR) is an advanced geomagnetic field model that provides a more detailed, accurate depiction of the geomagnetic field than the World Magnetic Model (WMM). WMMHR2025 includes core field and secular variation coefficients for degrees n = 1 to 15.