| 星座异构基准站网虚拟参考站数据生成方法 |
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| 引用本文： | 张熙,陈现春,包海.星座异构基准站网虚拟参考站数据生成方法[J].测绘通报,2020,0(2):66-71. |
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| 作者姓名： | 张熙 陈现春 包海 |
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| 作者单位： | 自然资源部第三大地测量队, 四川 成都 610100 |
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| 基金项目： | 四川省测绘地理信息局科技支撑项目（J2017ZC01）；成都市科学技术局创新驱动项目（2015-CX00-00011-ZF） |
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| 摘 要： | 针对各地现有卫星导航定位基准站可用星座存在差异性的问题，提出了按星座分别生成虚拟参考站数据的方法。该方法通过修正接收机钟差影响，实现了多个参考站作为主参考站生成同一个站点的虚拟观测值，有效避免了单个主参考站星座兼容性的影响，可为流动站提供更多的可用卫星。试验针对部分基准站不兼容北斗卫星的情况，分别在开阔区域和房角区域测试了按星座组网前后流动站的定位性能。结果显示：更多基准站参与服务能够改善虚拟参考站数据质量；按星座组网后流动站的定位质量更优，尤其可以显著改善流动站在房角等有遮挡区域的可用性和定位质量。研究成果对于有效整合当前各类基准站数据资源、提升服务对星座的兼容性具有实用价值。
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| 关 键 词： | 卫星导航定位基准站网 星座异构 主参考站 虚拟观测值 网络RTK服务 |
| 收稿时间： | 2019-05-16 |
Data generation method of constellation heterogeneous base station virtual reference station |
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| ZHANG Xi,CHEN Xianchun,BAO Hai.Data generation method of constellation heterogeneous base station virtual reference station[J].Bulletin of Surveying and Mapping,2020,0(2):66-71. |
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| Authors: | ZHANG Xi CHEN Xianchun BAO Hai |
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| Institution: | The Third Geodetic Brigade, Ministry of Natural Resources of the People's Republic of China, Chengdu 610100, China |
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| Abstract: | Traditional virtual reference station service is always exist constellation blind areas as constellation compatibility difference among reference stations. In order to overcome this disadvantage, a method is proposed to calculate virtual observation on the basis of error source analysis. Firstly, network construction is built through each GNSS constellation. Secondly, the master reference station of each GNSS constellation is searched. Thirdly, the master reference stations' receiver clock error are calculated and repaired. Finally, observations of multiple master reference stations are used to calculate observations of one virtual reference station. It effectively avoids the influence of single master reference station's constellation compatibility, and provides more satellites' differential data for rover station. In view of the incompatibility of some reference stations with BeiDou satellites, five reference stations are chosen to construct the observational network, and the middle station's BeiDou data is closed. Three test schemes are developed and rover station's positioning performance is tested in open areas and corner areas respectively. The experiment results confirm that virtual observation quality can be improved by combining more reference stations. Rover station can get better positioning quality, especially the usability and positioning quality can be significantly improved in the corner areas. The research has practical applicable value for combining existing reference stations and improving constellation compatibility of network RTK service. |
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| Keywords: | reference stations using global navigation satellite system constellation compatibility difference master reference station virtual observation network RTK service |
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