综合变形特征及双频约束的模糊度单历元搜索算法  

A single epoch ambiguity search algorithm based on deformation characteristic and dual frequency constraint

作　　者：杨文韬[1] 戴吾蛟[1] 朱建军[1] 

机构地区：[1]中南大学测绘与国土信息工程系,长沙410083

出　　处：《测绘科学》2008年第6期89-91,共3页Science of Surveying and Mapping

基　　金：国家自然科学基金项目资助(40574003)

摘　　要：利用变形监测中变形量在一定范围内、主要变形方向已知等变形特征,结合双频之间模糊度约束关系,提出了一种适用于动态变形监测的双频单历元GPS整周模糊度搜索的算法。新算法还采用DOP值与信噪比相结合,进行卫星分组,进一步缩小了模糊度搜索空间,从而大大地提高了模糊度搜索的成功率和速度。通过振动监测实验表明:对变形量在1m范围内的变形监测,该算法的效果显著,成功率高达99%以上。Based on the deformation characteristic and restriction of dual frequency ambiguity relation, a new ambiguity search algorithm has been put forward for high rate deformation. Combining DOP value with signal to noise ratio, this method divides the satellites into groups and reduces ambiguity search space greatly. From some GPS experimentation, it shows that the method is very effi- cient, and the success rate is more than 99% .

关 键 词：GPS 变形监测 整周模糊度 

分 类 号：P258[天文地球—测绘科学与技术]