| 基于实时Kalman滤波的电离层建模及精度分析 |
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| 引用本文： | 张正协,高成发,潘树国,袁本银,尚睿.基于实时Kalman滤波的电离层建模及精度分析[J].测绘工程,2020(3):9-14. |
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| 作者姓名： | 张正协 高成发 潘树国 袁本银 尚睿 |
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| 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;上海华测导航技术股份有限公司 |
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| 基金项目： | 江苏省自然科学基金资助项目(SBK2017021862);国家自然科学基金资助项目(41574026,41774027)。 |
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| 摘 要： | 文中使用CORS实时数据,基于Kalman滤波建立区域电离层TEC球谐函数模型。使用CORS相位平滑伪距电离层观测值,逐历元滤波求解电离层模型参数,分离卫星与接收机硬件延迟,并应用于单双频PPP定位中。实验结果表明,区域电离层模型精度约为1.9 TECU,较IGS发布的电离层格网数据(GIM)提高58.8%;采用区域电离层模型改正后单频PPP定位精度约为0.2 m,较GIM提高60.3%;模型提供的高精度电离层改正信息能够有效提升双频PPP收敛速度及初始定位精度。
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| 关 键 词： | 实时Kalman滤波 电离层延迟模型 CORS 球谐函数 PPP |
Research on ionospheric modeling and accuracy analysis based on real-time Kalman filtering |
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| ZHANG Zhengxie,GAO Chengfa,PAN Shuguo,YUAN Benyin,SHANG Rui.Research on ionospheric modeling and accuracy analysis based on real-time Kalman filtering[J].Engineering of Surveying and Mapping,2020(3):9-14. |
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| Authors: | ZHANG Zhengxie GAO Chengfa PAN Shuguo YUAN Benyin SHANG Rui |
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| Institution: | (School of Transportation,Southeast University,Nanjing 210096,China;School of Instrument Science and Engineering, Southeast University,Nanjing 210096,China;CHC Navigation Company,Shanghai 201799,China) |
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| Abstract: | Using the CORS real-time data,the regional ionospheric TEC spherical harmonic model is established by Kalman filtering.The CORS pseudo-range observations smoothing by carrier phase are used to solve the ionospheric model parameters by epoch filter,and the satellite and receiver hardware delays are separated and applied to single-and dual-frequency PPP.The experimental result shows that the accuracy of the regional ionospheric model is about 1.9TECU,which is 58.8%higher than GIM.The accuracy of single-frequency PPP after correction by regional ionospheric model is about 0.2 m,which is 60.3%higher than GIM.The high-precision ionosphere correction provided by the regional model can effectively accelerate the convergence speed and initial positioning accuracy of dual-frequency PPP. |
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| Keywords: | real-time Kalman filtering ionospheric delay model CORS spherical harmonic PPP |
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