Race to Redefine Earth's Magnetic Field Heats Up with Satellite Tech

A global competition is pushing for better ways to measure Earth’s magnetic field. The MagQuest challenge aims to speed up updates to the World Magnetic Model (WMM), which underpins navigation and mapping systems. Finalists are now preparing to launch their satellite-based solutions in the coming months. The World Magnetic Model (WMM) is vital for modern navigation, cartography, and satellite systems. It relies on accurate data from the Earth’s magnetic field, which shifts over time. Large changes can force early updates, but current methods are slow and resource-heavy.

The MagQuest competition was launched to find faster, more efficient ways to track these shifts. Three finalists have developed satellites with different magnetometer technologies. One uses a COSMO sensor, another an Io-1 design, while the third employs an NV quantum magnetometer.

The NV quantum magnetometer stands out for its extreme sensitivity. By detecting magnetic fields at a quantum level, it could provide real-time data with high precision. This technology has potential beyond navigation, including scientific research and industrial uses. The winning solution will help update the WMM more quickly, improving accuracy for global positioning systems. With satellites set to launch soon, the competition’s results could soon impact how the world measures and relies on Earth’s magnetic field. The improved model will support everything from aviation to smartphone navigation.