不等视距水准测量应用及精度分析

在水准测量作业过程中,为减小视距差引起的系统误差,相关规范对水准测量前后视距差及视距累积差进行了严格的控制,而在实际的工作中对前后视距差的控制又极大地限制了水准测量的应用领域以及工作效率。针对此问题,该文提出将i角当作系统参数进行平差的方法,平差结束即可得到i角值以及经过i角误差改化后的高程平差值。对比分析了附加系统参数平差法与条件函数法,实例表明附加系统参数平差法具有更好的高效性和稳健性。

Application and precision analysis of unequal stadia leveling

In the process of leveling,the strict restrictions,back-front stadia difference and cumulative difference are required to decrease the system errors caused by the i-angle error.However,the restrictions greatly limit the efficiency of leveling in practical application for enormous level points.In this paper,the i-angle was regarded as a system parameter involving in the process of adjustment to obtain the i-angle value and the elevation after i-angle error correction.Through comparing and analyzing the adjustment method and the condition function method,the results showed that the adjustment method of the additional system parameters has better efficiency and robustness.