The gravity datum

The gravity datum from 1992 to 1997 in North Qilian Hexi region are analyzed and the pattern evolution characteristics of gravity field before and after Yongdeng earthquake are studied by dynamic viewpoint .

对北祁连河西地区1992～1997年的重力资料进行了处理分析，从动态的观点研究了永登地震前后重力场的图像演化特征。

In the paper only the influences of permanent tides on the gravity datum , height datum , geoid and deflections of the vertical are discussed .

本文仅讨论永久性潮汐对重力基准、高程基准、大地水准面、垂线偏差等方面的影响。

After Taylor series expansion of gravitational potential field , the gravity anomaly observed on undulating ground can be converted into the gravity anomaly on horizontal datum by making use of higher derivative character in frequency domain ;

位场在作泰勒展开后，可利用高阶导数在频率域中的性质，将起伏地形上的重力异常换算到同一个水平面上的过程表现为一个迭代过程。