基于分步无电离层组合的北斗三频长距离参考站间宽巷模糊度解算方法

发布时间：2018-04-28 13:27

本文选题：北斗 + 三频　；参考：《东南大学学报(自然科学版)》2017年01期

【摘要】：针对北斗三频长距离参考站间宽巷(含超宽巷)模糊度解算中存在的问题,分析了影响宽巷组合(WLC)法、载波伪距组合的无几何无电离层(GIF)法及分步无几何(TCAR)法的主要因素及各自的局限性.在此基础上,基于参考站间基线已知的特性,提出了一种分步解算的无电离层(SIF)方法.首先采用载波伪距组合求解(0,-1,1)超宽巷模糊度,利用模糊度已固定的(0,-1,1)载波观测值与第2个宽巷/超宽巷观测值组成载波无电离层组合,同时分析了残余几何项误差对模糊度解算的影响.最后采用了一组长度为265 km的实测北斗三频基线数据进行了实验验证.实验结果表明,所提SIF方法能够有效消除长基线情况下电离层延迟的影响,同时受观测值噪声的影响较小.
[Abstract]:In view of the existing problems in the ambiguity resolution of wide roadway (including ultra wide roadway) between Beidou three frequency long distance reference stations, this paper analyzes the influence of WLC method on wide roadway combination. The main factors and their respective limitations of the carrier pseudo-range combination without geometric ionosphere-free GIFs and step by step geometric free TCAR methods are discussed. Based on the known characteristics of the baseline between reference stations, a step by step ionospheric sift (sif) method is proposed. Firstly, the carrier pseudo-range combination is used to solve the ambiguity of the ultra-wide lane, and the carrier observations with the second wide lane and the second wide lane are used to form the carrier ionospheric combination. At the same time, the influence of residual geometric error on ambiguity resolution is analyzed. Finally, a group of measured Beidou three-frequency baseline data with a length of 265 km is used for experimental verification. The experimental results show that the proposed SIF method can effectively eliminate the influence of ionospheric delay at long baseline and is less affected by the observed noise.
【作者单位】：东南大学交通学院;东南大学仪器科学与工程学院;
【基金】：国家自然科学基金资助项目(41574026) 中央高校基本科研业务费专项资金资助项目(KYLX15_0159) 东南大学优秀博士学位论文培育基金资助项目(YBJJ1635)
【分类号】：P228

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