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% .
出处
《测绘科学》
CSCD
北大核心
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)
关键词
GPS
变形监测
整周模糊度
GPS
deformation monitoring
integer ambiguity
