Abstract: In order to weaken the influence of atmosphere refraction on elevation surveying in dam three-dimension automatic surveying system,on the basic of characteristic and relativity of atmosphere refraction in small scope of highland, the gray model of refraction coefficients and correction methods are studied. The problem of refraction correction of unilateral triangulation in dam safety monitoring is efficiently solved. The technology studied can be used easily and efficiently, and have awide application value.

摘要： 为减弱大坝三维自动化监测系统中大气折光对高程测量误差的影响，本文在分析大气折光的特点，根据高地小范围内大气折光的相关性的基础上，研究了折光系数的灰关联模型及折光的改正方法，有效地解决了单向三角高程在大坝安全监测中的折光改正问题。研究的技术，使用方便，效果良好，有较广的应用价值。