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中纬地区不同距离网络RTK定位精度分析

发表时间:2012-03-31  浏览量:1188  下载量:549
全部作者: 张海宁,刘超,孙久运
作者单位: 中国矿业大学环境与测绘学院
摘 要: 为给不同精度要求的连续运行参考站(continuously operating reference stations, CORS)用户提供参考,同时为局部(矿山)CORS建站位置的选择提供可靠的依据,对虚拟参考站网络差分定位技术进行系统的研究。并考虑到非弥散性误差和弥散性误差属性的差异,分别建立了非弥散性误差模型和弥散性误差模型。同时,对非弥散性误差进行序列移动平滑处理,用于观测值的实时修正,进行L1载波相位整周模糊度的固定和基线的解算。在此基础上,对中纬地区不同距离下网络时时动态(real time kinematic, RTK)的主要误差源及定位精度进行分析,通过对NGS-CORS中纬度3个不同区域15个站点的数据进行试验。结果表明:随着距离的增加,空间相关误差逐渐增大,且不同站点间,误差的相关性减小,定位的精度降低;基线距离<60 km时,X,Y,Z 3个方向上的定位精度为1~2 cm;基线距离在60~90 km时,定位精度为2~4 cm.
关 键 词: 大地测量;虚拟参考站;全球定位系统;弥散性误差;非弥散性误差
Title: Analysis on positioning accuracy of network RTK of different distances over the mid-latitude zone
Author: ZHANG Haining, LIU Chao, SUN Jiuyun
Organization: School of Environment Science and Spatial Informatics, China University of Mining and Technology
Abstract: For providing a basis for users of continuously operating reference stations (CORS) and government or company who wants to establish CORS, the network differential positioning technology based on virtual reference station (VRS) was discussed. Meanwhile, the dispersive and non-dispersive errors were modeled and a running average method was applied to obtain smooth non-dispersive correction. Then, the integer ambiguity of L1 carrier-phase measurements was resolved, and the dispersive and non-dispersive errors were eliminated. On this basis, the main error sources and positioning accuracy of network RTK of different distances over the mid-latitude zone were analyzed, and fifteen stations in three different regions of the national geodetic survey-CPRS (NGS-CORS) were used to conduct a test. The results confirm that distance-dependent errors increased and correlation of errors in different stations and positioning accuracy decreased based on distance increased. In addition, the positioning accuracy can reach 1-2 cm and 2-4 cm, when baseline is less than 60 km and within the size of 60-90 km respectively.
Key words: geodesic measurement; virtual reference station; global position system; dispersive errors; non-dispersive errors
发表期数: 2012年3月第6期
引用格式: 张海宁,刘超,孙久运. 中纬地区不同距离网络RTK定位精度分析[J]. 中国科技论文在线精品论文,2012,5(6):578-584.
 
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