摘要
采用测距三角高程法进行跨河水准测量 ,可以不量取仪器高 ,但观测值中有两类不同的观测量。利用Helmert方差分量估计 ,通过若干次迭代计算 ,可以更准确地确定两类观测值权的关系 。
When completed river crossing leveling by means of trigonometric leveling with distance measurement, there are two types of observed values. If we use Helmert WF variance component estimation and iterating several times, accurate connection between the two types of observed values is able to be found so that precision of adjusted value will be improved.
出处
《测绘学院学报》
北大核心
2004年第1期27-29,共3页
Journal of Institute of Surveying and Mapping
关键词
跨河水准
HELMERT方差分量估计
测距三角高程
river crossing leveling
Helmert WF variance component estimation
trigonometric leveling with distance measurement
