电磁波测距三角高程代替四等水准的精度分析

Electromagnetic Range Measurement Trigonometric Leveling Instead of Four Order Levels Survey Accuracy Analysis

对电磁波三角高程测量的误差进行了详细讨论,模拟数据表明,高差中误差主要取决于测角精度、视线长度和仪器高量测精度。对测角中误差为1″或更高测角精度的仪器,使用对向观测的方法,可用三角高程测量可代替四等水准测量。

This paper analyzes the error of trigonometric leveling and points out that the effect of observation angle size on the error in height difference can be neglected.According to the characteristics of trigonometric leveling,the error in the height difference is mainly related to the accuracy of the instrument angle,the sight length and the high measurement accuracy of the instrument.When the instrument with the error angle of 1″or higher is used to measure the angle,trigonometric leveling can replace four order level.