Given four basic parameters of a reference ellipsoid, the normalpotential field generated by the ellipsoid could be determined by using conventional method.
给定参考椭球体的四个基本参数，椭球体产生的外部正常重力位场可利用传统方法确定。
2
By calculating, it can be found that the potential energy in magnetic field is different from the normalpotential energy, it is a function of both coordinates and time.
通过计算发现，磁场中的势能不同于通常意义的势能，它既可以是位置坐标的函数，也可以是时间的函数。
3
The results are as follows:1)The chief contributions of the normalpotential field are mainly concentrated at the long quasi-stationary waves and show significant seasonal variations.