基于球谐函数的全球地磁场的计算，包括各个地磁要素。-Based on spherical harmonic function, the calculation of the global geomagnetic field, including various magnetic elements.

物探专业磁法程序，该程序可根据最新的球谐系数用于计算地球上任意经纬度的正常场值。-Geophysical professional magnetic method program, the program can be calculated according to the latest spherical harmonic coefficients for normal field values ​ ​ for a