Introduction - If you have any usage issues, please Google them yourself
The use of the order of 12 Legendre spherical harmonics geomagnetic information to accurately calculate the Earth s surface and near-Earth space, the input parameters: three-dimensional location (latitude, longitude, altitude (in kilometers)) and time (decimal years ), output: 7 amount of the geomagnetic field, including: geomagnetic total intensity F, the horizontal component of the geomagnetic field H, northward component X, east component Y, Z, and the vertical component of magnetic declination D and inclination I.