网络RTK网外定位精度分析  

Analysis of Net Work RTK Positioning Precision Out of Network

作　　者：石鑫[1] 吕志伟[1] 王兵浩 于晓东 唐文杰 

机构地区：[1]信息工程大学导航与空天目标工程学院,河南郑州450001

出　　处：《全球定位系统》2015年第3期25-29,50,共6页Gnss World of China

摘　　要：现有网络RTK在网内的定位精度已经得到充分认证,能够达到厘米级,但网外的定位精度缺乏有效验证,对流层、电离层等误差的空间相关性限制了网外定位的作业距离。对网络RTK网外定位精度进行了详细分析,采用线性模型外推空间相关误差,用虚拟参考站技术搭建网络RTK,在网外不同位置检验定位精度。结果表明:定位精度随着用户离基站网距离的增加而降低,在参考站网络模糊度固定的情况下,用户位于网外20km范围内时,网络RTK基本能提供厘米级的定位精度,超过30km时,定位精度明显下降,且波动较大。It has been certified that network RTK can achieve CM positioning within stations network,but the precision outside of network lack of verification,and the work distance limited by the correlation of errors such as ionosphere and troposphere.The Virtual Reference Station and Linear Interpolation Model were used to build network RTK,tested positioning errors comprehensively on different positions.The result shows that positioning precision decreases along with the increase of the distance between user and stations network.And if the ambiguity of the reference station network has been fixed,the network RTK can provides CM positioning service when users locate within 20 km outside of the network,and the precision decreases and fluctuates obviously while the distance over 30 km.

关 键 词：网络RTK 虚拟参考站 空间相关误差 线性内插 定位精度 

分 类 号：P228.4[天文地球—大地测量学与测量工程]