GPS连续运行参考站网络分析及网络参数估计  

GPS Network Analysis and Parameters Estimation for Continuously Operating Reference Stations

作　　者：李春华[1,2] 黄丁发[1] 邓芳[2] 周乐韬[1] 

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]成都市勘察测绘研究院,成都610081

出　　处：《世界科技研究与发展》2010年第5期573-576,共4页World Sci-Tech R&D

基　　金：国家高技术研究发展计划(863)项目(2007AA12Z315);国家自然科学基金(40771173);青年教师科研起步项目(2007Q109)

摘　　要：本文分析了各种构网方式对网络模糊度解算效率的影响;阐述了最优双差观测值和观测方程的双差映射生成方法;本文在考虑网络参数的各种相关性的基础上,建立了整网卡尔曼滤波方程来整体估计网络参数,并使用LAMBDA方法解算具有奇异方差阵的模糊度。使用成都GPS综合服务网的子网数据验证了该模糊度算法,使用该网的实时数据计算了天顶对流层延迟网络参数,并与Gamit估值进行了对比。The efficiency of network ambiguity is analyzed in all kinds of networks with different structures in it. It describes the method for constructing double-difference optimum observations and functions. An integer estimation method for whole network is proposed based on the correlation of network parameters. The proposed method includes the resolution of the ambiguity with singularity variance matrix based on LAMBDA algorithm,and finally an experiment is tested to validate its validity. The real time zenith tropospherical delay is estimated and com- pared with the results of Gamit based on the data of Chengdu Integrated GPS Network.

关 键 词：网络 模糊度 连续运行参考站 全球定位系统 

分 类 号：P228.4[天文地球—大地测量学与测量工程]