| 短基线北斗三频数据模糊度解算方法的比较 |
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| 引用本文： | 于嘉琪,王振杰,聂志喜.短基线北斗三频数据模糊度解算方法的比较[J].海洋测绘,2015(4):44-47. |
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| 作者姓名： | 于嘉琪 王振杰 聂志喜 |
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| 作者单位： | 中国石油大学(华东) 地球科学与技术学院,山东 青岛 266000 |
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| 基金项目： | 国家自然科学基金(41374008) |
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| 摘 要： | 首先分析了矩阵变换、无几何CIR、几何CIR、组合观测量PAR、原始观测量PAR五种模糊度解算方法的原理;然后采用短基线北斗三频实测数据对每种方法进行测试和分析比较。结果表明:短基线条件下,无几何CIR算法和矩阵变换算法受电离层延迟和观测噪声的影响较大,模糊度固定成功率比较低,不适用于北斗实测数据;几何CIR算法和组合观测量PAR算法采用组合观测量会放大噪声水平,部分历元的模糊度固定出现错误;原始观测量PAR模糊度固定成功率最高,在本次算例中达到100%。
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| 关 键 词： | 北斗卫星导航系统 短基线 三频数据 组合观测值 模糊度解算 |
Comparison on Ambiguity Resolution Methods Based onBeidou Triple-frequency Data of Short Baselines |
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| YU Jiaqi,WANG Zhenjie,NIE Zhixi.Comparison on Ambiguity Resolution Methods Based onBeidou Triple-frequency Data of Short Baselines[J].Hydrographic Surveying and Charting,2015(4):44-47. |
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| Authors: | YU Jiaqi WANG Zhenjie NIE Zhixi |
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| Institution: | School of Geosciences,China University of Petroleum,Qingdao 266000 ,China |
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| Abstract: | First of all,five multi-frequency ambiguity resolution methods are analyzed,including the matrixtransformation,geometry-free CIR,geometry-based CIR,partial ambiguity resolution with combinationobservations and partial ambiguity resolution with original observations.Then,the above methods are tested andcompared based on Beidou triple-frequency measurement data of short baseline.The results indicated that:theambiguity can hardly be fixed in single epoch with geometry-free CIR and matrix transformation,for the twomethods are limited to serious ionospheric delay and noise effects.Hence,they are not suitable for Beidoumeasurement data.Moreover,when using geometry-based CIR and partial ambiguity resolution with combinationobservations,some errors appears in part of the epoch because both the two methods utilize the combinationobservations which can enlarge the noise effects.On the contrary,the partial ambiguity resolution with originalobservations get satisfactory ambiguity resolution results and the success rate can reach 100%. |
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