摘要
本文分析了测站方向观测的可靠性，讨论了方向现测误差对改正数和未知数的影响规律。
This paper analyzed the reliability of the direction observation in theobservatory, and discussed the influence of direction observation error on theinfluencing law of the correct numbers and the unknowns.
关键词
方向观测
误差
可靠性
经纬仪
控制测量
direction observation, error, internal and external reliability
