Modeling the global geomagnetic field
Advanced Earth electromagnetism Homework-3Build an internal geomagnetic using observatory data Wu Xianshu 12132710 Methods and dataAccording to the Gauss Theory of geomagnetism, we can use the spherical harmonic analysis to describe the earth’s main magnetic field. Suppose the magnetic potential of the geomagnetic field obeys Laplace’s equation at the surface of the Earth as well as outside of the Earth, the model can be written as: \begin{equation} \begin{aligned} V(r,\theta,\...