测绘通报 ›› 2020, Vol. 0 ›› Issue (10): 74-78.doi: 10.13474/j.cnki.11-2246.2020.0322

• 学术研究 • 上一篇    下一篇

改进CIR算法在BDS长基线模糊度解算中的应用

刘伟1, 刘国超1, 郑小战2, 张庆华1   

  1. 1. 广州市城市规划勘测设计研究院, 广东 广州 510060;
    2. 广州市地质调查院, 广东 广州 510440
  • 收稿日期:2020-01-15 修回日期:2020-08-23 出版日期:2020-10-25 发布日期:2020-10-29
  • 通讯作者: 刘国超。E-mail:137892489@qq.com E-mail:137892489@qq.com
  • 作者简介:刘伟(1970-),男,硕士,教授级高级工程师,主要从事岩土工程和城市地质研究。E-mail:591214808@qq.com
  • 基金资助:
    广州市多要素城市地质调查项目(DD20190219);广州市科技计划项目(201604016063)

The application of improved CIR algorithm in solving BDS long baseline ambiguity

LIU Wei1, LIU Guochao1, ZHENG Xiaozhan2, ZHANG Qinghua1   

  1. 1. Guangzhou Urban Planning&Design Survey Research Institute, Guangzhou 510060, China;
    2. Guangzhou Geological Survey, Guangzhou 510440, China
  • Received:2020-01-15 Revised:2020-08-23 Online:2020-10-25 Published:2020-10-29

摘要: 长基线条件下,测站间空间相关性弱,电离层、对流层延迟经过双差并不能很好地消除,致使CIR方法在长基线条件下解算模糊度成功率较低。本文通过BDS三频组合选择长波长、弱电离层组合改进宽巷组合系数,选取(-1,-5,6)代替传统的宽巷组合(0,-1,1),选择弱电离层几何相位组合(4,-5,2)代替传统的窄巷组合(0,0,1),并通过将多频点的伪距观测值和确定了模糊度的宽巷相位观测值线性组合消除电离层延迟一阶项。通过实测数据分析,本文提出的算法能够有效解算超宽巷、宽巷模糊度,提高模糊度解算成功率。

关键词: CIR, 长基线, 模糊度解算, 载波相位平滑, 电离层延迟, 对流层延迟

Abstract: Under the condition of long baseline, the ionospheric delay and tropospheric delay cannot eliminate well due to the weak spatial correlation between stations, which cause the success rate of CIR method in solving ambiguity under long baseline condition is low. This paper selects the combination of long wavelength and weak ionosphere to improve the combination coefficient of wide lane, uses the combination (-1, -5, 6) instead of the traditional wide lane combination(0, -1, 1), and the weak ionosphere geometric phase combination (4, -5, 2) instead of the traditional narrow lane combination (0, 0, 1), adopts the linear combination of the multi frequency pseudorange observations and the wide lane phase observations to eliminate the first order term of ionospheric delay. Through the analysis of measured data, the algorithm proposed in this paper can effectively solve the fuzzy degree of ultra-wide lane and wide lane, and improve the success rate of ambiguity resolution.

Key words: CIR, long baseline, ambiguity resolution, phase smoothing, ionospheric delay, tropospheric delay

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