特殊地形条件的精密高程测量

Precise Height Surveying in Special Topographical Conditions

在特殊地形条件下采用精密三角高程测量和水准测量结合的方法进行高程控制,从三角高程测量的原理出发,分析了误差来源,采用类似水准测量的方法消除仪器高误差,计算出精度;并对两类观测值,利用赫尔默特方差分量估计,通过多次迭代计算,提高平差精度。

Under the special topographical conditions, the method combining precise triangulated height surveying and leveling is used to elevation controlling. Forming the principle of the triangulated height surveying, this paper analyses error source, uses the method of similar leveling to avoid the error of measuring instrument height, and calculates the precision; With two types of observations, using Helmert variance component estimation, it can improve adjustment precision through multiple iterations.