对有效地球半径的推导方法和应用进行了讨论。
Application of effective earth radius and methods to derive it are discussed.
动态改变大地水准面差距与地球半径的比值，改善了地球形状的三维表达效果；
Dynamic changing the scale of geoid undulations and the radius of the earth, the video mode of the earth figure is improved.
等效地球半径的使用可大大简化电波在大气中传播时折射效应的复杂运算，因此在实际工程中获得广泛应用。
The refraction effect complex operation can be greatly simplified by using equivalent earths radius; therefore it is widely available in the actual project.
等效地球半径的使用可大大简化电波在大气中传播时折射效应的复杂运算，因此在实际工程中获得广泛应用。
The refraction effect complex operation can be greatly simplified by using equivalent earths radius; therefore it is widely available in the actual project.
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