Which coincide with the mean sea level surface is the geoid.

其中与平均海平面重合的面就是大地水准面。

The local refined Quasi-Geoid has been constructed in several regions and widely applied.

区域精化似大地水准面在全国多个地区已经建立，同时也得到了广泛应用。

The maximum difference of geoid undulation between the model and EGM96(to 70 degrees) is 2.

该模型与EGM96相比（70阶次），大地水准面起伏差异最大为2。

The main purpose of physical geodesy is to ascertain the outer Earth gravity field and geoid.

物理大地测量的主要目标是确定地球外部重力场和大地水准面。

As a criterion of the earth's equilibrium is taken the deviation of the geoid from the spheroid.

地球体与球的偏差，被用来作为地球平衡的判据。