【作者】 沈雪峰； 高成发； 潘树国；

【Author】 SHEN Xue-Feng1,GAO Cheng-Fa1,PAN Shu-Guo2 1.Transportation College of Southeast University,Nanjing 210096,China; 2.Department of Instrument Science and Engineering,Southeast University,Nanjing 210096,China

【机构】 东南大学交通学院； 东南大学仪器科学与工程学院；

【摘要】 在网络RTK技术(特别是虚拟参考站VRS技术)中,建立精确的区域误差改正模型有利于改善流动站模糊度解算性能,缩短初始化时间。本文针对当前4种主要的网络RTK内插模型,根据综合误差的特性,即将综合误差分成一阶电离层空间相关线性误差项、对流层空间相关线性误差项以及其他综合误差,结合本文提出的基站四边形网络拓扑结构组网技术,提出一种改进的网络RTK内插方法。本文提出的基于基站四边形网络拓扑结构的网络RTK内插改进方法,充分利用了拓扑结构的特性,将其中一个辅助站作为监测站,并利用它来提高内插双差电离层误差的精度,而对于对流层误差,提出在常规内插改正模型基础上建立三维内插方法来修正参考站与流动站高程差异引起的对流层误差改正数中系统偏差的影响,提高对流层改正精度。实验结果表明,本文提出的网络RTK内插模型改进方法分别提高了电离层误差改正数精度以及对流层误差改正数精度,从而实现了综合误差的改正精度。更多还原

【Abstract】 In network RTK(especially the Virtual Reference Station),a precise model of area error correction will help to improve the performance of ambiguity resolution and reduce the time of initialization at the rover position.Four typical methods to describe the biases at the rover position were discussed to develop a modified interpolation method with characteristic of combined bias.It separates the combined bias into three parts:the first order linear space-related ionosphere delay,the linear space-related troposphere delay and residual error,combined with the proposed quadrilateral base station network topology networking technology.This paper presents this new ionosphere bias interpolation method with base station network topology,which will stand as an auxiliary station,and use it to improve the interpolation error of the double difference ionosphere delay accuracy.Three-dimensional interpolation method is presented to correct the height difference between reference station and rover troposphere to improve the accuracy of troposphere correction due to the number of error correction of deviations,based on the conventional interpolation.Tests result that the modified interpolation methods improve the accuracy of ionosphere and troposphere correction in order to improve the accuracy of correction..更多还原