整周模糊度去相关的两种实现方法  

Two methods of ambiguity decorrelation

作　　者：蔡艳辉[1] 程鹏飞[1] 李夕银[1] 

机构地区：[1]中国测绘科学研究院,北京100039

出　　处：《测绘工程》2003年第4期36-38,45,共4页Engineering of Surveying and Mapping

摘　　要：整周模糊度搜索一直是GPS快速精确定位的关键问题。短时间的观测会导致观测方程和整周模糊度方差、协方差矩阵的高相关性,因而急剧增大整周模糊度的搜索空间,对整周模糊度未知数方差、协方差矩阵进行去相关性处理,可以有效地压缩搜索空间。本文对整周模糊度去相关的迭代法和联合变换法从原理上进行了阐述,并结合实际算例进行了分析和比较。Searching for integer cycle ambiguities has been a hot topic in precise GPS fast positioning. A short observaton span will lead high correlation between the observation equations and variance-covariance matrix of ambiguity unknowns. Therefore, the search space of ambiguity is elongated rapidly. The search space will be compressed efficiently when the variance-covariance matrix is free from the high correlation. In this paper, two methods of ambiguity decorrelation and some numerical results are given.

关 键 词：整周模糊度 联合Z变换 LAMBDA方法 观测 方差 协方差 

分 类 号：P207.1[天文地球—测绘科学与技术] O159[理学—数学]