| 引用本文: | 刘增军,彭 竞,吕志成,等.一种适用于长基线的改进CIR算法.[J].国防科技大学学报,2013,35(2):93-98.[点击复制] |
| LIU Zengjun,PENG Jing,LV Zhicheng,et al.An improved CIR for long baseline[J].Journal of National University of Defense Technology,2013,35(2):93-98[点击复制] |
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| 一种适用于长基线的改进CIR算法 |
| 刘增军, 彭 竞, 吕志成, 欧 钢 |
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(国防科技大学 电子科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| 长基线下，受伪距多径和电离层残差影响，传统的CIR法解算载波相位宽巷模糊度时某些历元无法得到正确的结果，基础载波模糊度的搜索范围也较大。分析了CIR法的模糊度误差，提出了基于载波相位平滑伪距并且消除电离层时延的改进的CIR算法，分析了其误差方差，最后利用Compass系统实测数据对短基线和长基线两种情况下CIR法和改进CIR法的解算结果进行比较。实测数据表明，本文提出的算法能够单历元解算超宽巷模糊度和宽巷模糊度，并且能够大大缩小基础载波模糊度的搜索空间。 |
| 关键词: 级联模糊度确定法 长基线 多路径 载波相位平滑伪距 电离层 |
| DOI： |
| 投稿日期：2012-08-31 |
| 基金项目:第二届中国卫星导航学术年会青年优秀论文获奖者资助课题（CSNC2011-QY-11） |
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| An improved CIR for long baseline |
| LIU Zengjun, PENG Jing, LV Zhicheng, OU Gang |
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(College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| At long baseline, for multipath and ionospheric residual bias, classical CIR can
get wrong ambiguity resolution at some epoch, and requires a large search area on basic carrier. In this
research, ambiguity errors of CIR were analyzed, and an approach to improved CIR based on carrier phase
smoothing pseudorange and eliminating ionosphere delay is presented and errors variance was analyzed. Finally,
CIR and improved CIR were compared at both short and long baseline by compass measured datum. The result shows
that improved CIR can obtain correct double difference extra wide lane ambiguity and wide lane ambiguity on
one epoch, and reduce the search area on basic carrier ambiguity. |
| Keywords: cascade integer resolution long baseline multipath carrier phase smoothing pseudorange ionosphere |
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