三角高程测量高差值应进行球差改正。
Elevation difference by trigonometric leveling shall be corrected by spherical aberration.
在闭合导线内业计算中，由于连接角没有检核条件，因而对连接角未进行改正。
In office calculation of closed traverse, the Angle of connection is not corrected, because there is no check condition.
本文在分析现有水准折光改正方法的基础上，导出了一种基于水准视线折光角的改正模型。
Based on the analysis of present methods for atmospheric refraction correction, a new correction model is put forward based on the refraction Angle of the line of sight.
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