GPS动态定位中的虚拟观测方程研究  

The virtual observation equation in GPS dynamic positioning

作　　者：崔建勇[1] 陈明剑[1] 

机构地区：[1]信息工程大学测绘学院,河南郑州450052

出　　处：《测绘工程》2013年第4期9-12,共4页Engineering of Surveying and Mapping

基　　金：国家自然科学基金资助项目(41074011);国防预研项目(9140A22040809JB52)

摘　　要：高精度的单历元GPS动态定位由于观测值数目较少而很难确定整周模糊度。为了解算整周模糊度,需要利用已有的坐标、速度等信息。在分析常规GPS参数解算模型的基础上,推导利用虚拟观测值的GPS虚拟观测模型并分析取其相应权的方法,结合已有信息和伪距、相位观测值联合解算来进行单历元坐标分量改正数求解。并通过一个实际算例验证方法有效且可靠地提高整周模糊度解算的成功率。High-precision dynamic single epoch GPS positioning cannot determine the ambiguity solution because of the very small number of observations,In order to solve the ambiguity,the data of position and speed are needed.On the basis of conventional model,the virtual equation and virtual right are deduced,and combined with the existing information and pseudorange,phase observations are involved to get single epoch solution of the baseline.Through experimental analysis,the model using the virtual observables can improve the reliability and success rate of the ambiguity.

关 键 词：虚拟观测值 全球定位系统 整周模糊度 虚拟权 单历元定位 

分 类 号：P228[天文地球—大地测量学与测量工程]