试论等级三角高程测量(Ⅰ)

Discussion on the Limit of Errors in Graded Triangulation Level Survey

从分析三角高程测量高差误差的组成入手,论述图根、四等、三等三角高程测量天顶距测角中误差的必要精度、最短边长、大气折光系数误差的取值,以及最佳测量时间,提出对向观测高差的限差计算与测站检验方法。

Starting from the composition of elevation errors in triangulation level survey, this paper makes exposition on the necessary precision of errors existing in the surveyed angle of zenith distance for the graphical, fourth-order and third-order triangulation level survey, and the values to be taken for the shortest side length, atmospheric refraction coefficient, as well as the optimum surveying time.The calculation of limit error for reciprocal observation and the check routine for a surveying station are also put forward.