自动照准全站仪精密三角高程测量在跨河水准测量中的应用

随着全自动智能型全站仪的发展及光学水准仪的逐步淘汰，精密三角高程测量在跨河高程传递方面应用广泛。本文详细介绍了基于全自动照准全站仪的精密三角高程测量的四边形跨河水准测量方法的原理及步骤，并对该方法中对向观测获取跨河点间高差进行了理论推导和精度分析，证明了控制在一定跨河距离内并采取相应措施消除其他误差的情况下，该方法可用于二等水准跨河测量；最后通过实例证实了该方法能满足二等跨河水准测量精度要求。

Application of precision trigonometric elevation measurement in river-crossing leveling based on autocollimation total station

With the development of fully automatic intelligent total station and the gradual elimination of optical level,precise trigonometric leveling has been widely used in river-crossing elevation transfer.This paper detailed the principle and steps of quadrilateral river-crossing leveling method based on precise trigonometric leveling with fully automatic total station.In addition,this method carried out theoretical derivation and precision analysis of the height difference between river-crossing points obtained by directional observation,and it was proved that this method could be used in the second-class river-crossing leveling under the condition of controlling a certain cross-river distance and taking corresponding measures to eliminate other errors.Finally,an experiment showed that the method could meet the accuracy requirements of second-class river-crossing leveling.