[1]喻国荣,王庆,彭慧.多参考站网络的虚拟观测值生成算法[J].东南大学学报(自然科学版),2007,37(6):1113-1116.[doi:10.3969/j.issn.1001-0505.2007.06.034]
 Yu Guorong,Wang Qing,Peng Hui.Approach of virtual observations generation of a multi-reference station network[J].Journal of Southeast University (Natural Science Edition),2007,37(6):1113-1116.[doi:10.3969/j.issn.1001-0505.2007.06.034]
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多参考站网络的虚拟观测值生成算法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
37
期数:
2007年第6期
页码:
1113-1116
栏目:
测绘与导航
出版日期:
2007-11-20

文章信息/Info

Title:
Approach of virtual observations generation of a multi-reference station network
作者:
喻国荣1 王庆2 彭慧1
1 东南大学交通学院, 南京 210096; 2 东南大学仪器科学与工程学院, 南京 210096
Author(s):
Yu Guorong1 Wang Qing2 Peng Hui1
1 School of Transportation, Southeast University, Nanjing 210096, China
2 School of Indtrument Science and Engineering, Southeast University, Nanjing 210096, China
关键词:
GPS 多参考站 空间相关误差 虚拟观测值
Keywords:
global positioning system multiple reference station spatially-correlated errors virtual observables
分类号:
P228.4
DOI:
10.3969/j.issn.1001-0505.2007.06.034
摘要:
讨论了GPS观测值误差改正方法,提出了一种基于多参考站的GPS观测值向流动站用户发布虚拟观测值的算法.该算法通过参考站的已知精确坐标和已经解算的模糊度计算参考站间双差空间相关误差,然后内插局域网内任意一点空间相关误差作为改正数.当只使用3个参考站时使用线性内插法,多于3个参考站时使用曲面拟合或最小二乘平差方法等内插方法.用内插获得的改正数改正离流动站最近的参考站(主参考站)的观测值,形成虚拟观测值,然后发送给流动站用户,流动站用户仍然应用已有的单参考站GPS定位算法进行定位.通过对江苏局域参考站网络收集的实测数据计算分析证明了本文算法的有效性,达到厘米级定位精度.
Abstract:
The strategy of correction modeling of GPS(global positioning system)measurement errors is discussed, and an approach the virtual observation generation to the rover receivers based on a multi-reference GPS station network is presented. The inter-reference-station differential spatially-correlated errors are estimated using highly accurate coordinates of the reference stations and assumed resolved ambiguities. These spatially-correlated errors are interpolated among the network region as corrections. This is done using linear combination if there are only three reference stations, and using a low order surface-fitting function or a least-squares adjustment technique if the number of reference stations is more than three. These network-generated corrections are used to correct the zero differential observables of one reference station, which is usually the closest one to the rover(the so-called primary reference station). These corrected zero differential observables, named virtual observables, are then sent to rovers and processed using conventional single reference station differential GPS algorithms. A test conducted using regional reference networks in Jiangsu demonstrates the effectiveness of the approach, and centimeter level accuracies of positioning precision are achieved.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目: 国家科技支撑计划资助项目(2006BAB15B01).
作者简介: 喻国荣(1971—),男,博士,工程师, ygrfish@sina.com.
更新日期/Last Update: 2007-11-20