Deadline: 2019-05-16 Award: $1,200,000 Open to: US entities and individuals*
Earth is a giant magnet. Compasses, both digital and analog, are oriented by the magnetic force at a user’s location. Since geographic and magnetic poles do not align, geomagnetic models like the World Magnetic Model (WMM) correct for this difference.
As the Earth’s magnetic field is constantly changing, the difference between geographic and magnetic north also changes, and the WMM must be regularly updated.