Quality analysis of BDS／GPS engineering control network
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摘要: 针对北斗卫星导航系统(BDS)建立工程控制网的应用问题,以广东省域内某控制网为实例,分别从观测数据质量情况、基线解算与平差精度、坐标结果差异性等指标,与GPS进行对比,验证了BDS系统建立工程控制网的可行性. 结果表明,BDS可见卫星数与GPS相差不大,BDS的基线解算与平差精度整体略低于GPS,且在U方向上相对更为明显. 当测站数据质量较好时,BDS／GPS坐标结果平均只有毫米级的差异,完全可替代GPS作为最终成果;当测站数据质量较差时,坐标结果平均有毫米级至厘米级的差异,可满足一般工程控制网的要求.Abstract: Aiming at the application problem of establishing engineering control network of BeiDou Navigation Satellite System (BDS).Taking a control network in Guangdong Province as an example, the indicators are compared with GPS from the quality of observation data, baseline calculation and adjustment accuracy, and differences in coordinate results, which verified the feasibility of the BDS system to establish an engineering control network. The results show that the number of BDS visible satellites is almost as same as GPS, and the accuracy of the BDS baseline solution and adjustment of is slightly lower than GPS as a whole, and it is relatively more obvious in the U direction. When the quality of the station data is good, the average BDS／GPS coordinate results have only millimeter differences, which can completely replace GPS as the final result; When the station data quality is poor, the coordinate results have average millimeter to centimeter differences, which can meet the requirements of general engineering control networks.
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Key words:
- BDS／GPS /
- engineering application /
- data quality /
- accuracy /
- coordinate difference
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