说明：  输入地磁场的北向分量X，垂直分量Z和东向分量Y，可计算出地磁场的总磁场强度T，和水平分量H，磁偏角D和磁倾角I
(By inputting the north component X, the vertical component Z and the East component Y of the geomagnetic field, the total magnetic field intensity T, the horizontal component h, the declination D and the declination I of the geomagnetic field can be calculated)