北斗地基增强系统框架下流动站定位精度分析
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摘要
江苏连续运行的参考站(CORS)苏州分中心已经建成覆盖全市的北斗地基增强系统框架网络,并基于此框架网络对区域用户提供服务,针对流动站在不同环境下连接各种源节点的稳定性和局限性问题进行了一系列测试.结果表明,在卫星不被遮挡的情况下,无论接收机是采用单星模式、双星模式,还是三星模式,其定位精度均能满足要求,即平面精度优于5cm,高程精度优于10cm.在卫星被遮挡的情况下,三星模式优势尤其明显,其初始化时间、稳定性以及定位精度均优于其他两种模式.
Suzhou Branch of Jiangsu CORS has built a whole city covering BeiDou ground-based augmentation system framework network.It provides services to regional users based on this framework network.A series of tests were conducted on the stability and limitations of the connection of various source nodes under different environments.The results show that its positioning accuracy can meet the requirements.The plane accuracy is better than 5 cm and the elevation accuracy is better than 10 cm,whether the receiver adopts single star mode,double star mode or three star mode when the satellite is not occluded.In the satellite occlusion case,three star mode advantage is particularly obvious,its initialization time,stability and positioning accuracy are better than the other two modes.
Suzhou Branch of Jiangsu CORS has built a whole city covering BeiDou ground-based augmentation system framework network.It provides services to regional users based on this framework network.A series of tests were conducted on the stability and limitations of the connection of various source nodes under different environments.The results show that its positioning accuracy can meet the requirements.The plane accuracy is better than 5 cm and the elevation accuracy is better than 10 cm,whether the receiver adopts single star mode,double star mode or three star mode when the satellite is not occluded.In the satellite occlusion case,three star mode advantage is particularly obvious,its initialization time,stability and positioning accuracy are better than the other two modes.
引文
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[3]刘东军.千寻位置服务与CORS系统的精度探讨[J].石化技术,2018(4):229.
[4]曹立,张现礼,吴文坛.河北省卫星定位综合服务系统建设综述[J].测绘通报,2010(增刊):1-4.
[5]彭慧,高成发,喻国荣.基于VRS的GPS伪距码的虚拟与精度分析[J].测绘通报,2007(6):1-4.
[6]敖敏思,黎晨曦,刘琼,等.HNCORS管理服务与统计分析系统研究[J].地理空间信息,2018,16(3):7-9,16.
[7]汤伟尧,师悦龄,丁一航.四川省CORS网地壳运动速度场模型研究[J].大地测量与地球动力学,2018,38(5):464-468.
[8]张迎燕,刘全海,曹奇.城市CORS系统数据质量检核与评估分析[J].测绘与空间地理信息,2018,41(1):156-159.
[9]聂兆生,黄勇,刘刚,等.湖北CORS系统数据质量评估分析[J].大地测量与地球动力学,2013,33(6):53-56.
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