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The Enhanced Magnetic Model (EMM) extends to degree and order 720, resolving magnetic
anomalies down to 56 km wavelength. The higher resolution of the EMM results in significantly
improved pointing accuracy than the World Magnetic Model (WMM), which uses spherical
harmonic representation to degree and order 12, resolving the magnetic field at 3000
km wavelength. The EMM model provides the magnetic field vector at any desired location
and altitude close to and above the Earth's surface. |