Precise point positioning for the efficient and robust analysis of GPS data from large networks
Precise point positioning for the efficient and robust analysis of GPS data from large networks
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DOI：
10.1029/96jb03860
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发表时间：
1997-03-10
影响因子：
3.9
通讯作者：
Webb, FH
中科院分区：
文献类型：
--
作者：
Zumberge, JF;Heflin, MB;Webb, FH
由数十至数百个长期运行的全球定位系统精密接收器组成的网络正在出现，空间尺度从10（0）公里到10（3）公里不等。为了保持与分析这种数据相关联的计算负担在经济上可行，一种方法是首先从全球分布的GPS接收器网络确定精确的GPS卫星位置和时钟校正。然后，通过用接收器特定的数据估计接收器特定的参数来分析来自本地网络的数据;卫星参数被保持固定在全局解中确定的它们的值。这种“精确的点定位”允许每天用4000万次计算机分析数百到数千个站点的数据，其结果在质量上与所有数据的同时分析相当。全局和网络解决方案的参考框架可以免于任何站点上的错误基准约束所施加的失真。
Networks of dozens to hundreds of permanently operating precision Global Positioning System (GPS) receivers are emerging at spatial scales that range from 10(0) to 10(3) km. To keep the computational burden associated with the analysis of such data economically feasible, one approach is to first determine precise GPS satellite positions and clock corrections from a globally distributed network of GPS receivers. Then, data from the local network are analyzed by estimating receiver-specific parameters with receiver-specific data; satellite parameters are held fixed at their values determined in the global solution. This ''precise point positioning'' allows analysis of data from hundreds to thousands of sites every day with 40-Mflop computers, with results comparable in quality to the simultaneous analysis of all data. The reference frames for the global and network solutions can be free of distortion imposed by erroneous fiducial constraints on any sites.