| 估计卫星频间偏差的GLONASS伪距定位改进模型及其验证 |
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| 引用本文： | 刘姣,陈俊平,王彬.估计卫星频间偏差的GLONASS伪距定位改进模型及其验证[J].大地测量与地球动力学,2021,41(1):27-33. |
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| 作者姓名： | 刘姣 陈俊平 王彬 |
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| 作者单位： | 中国科学院上海天文台,上海市南丹路80号,200030;中国科学院大学,北京市玉泉路19号甲,100049;中国科学院上海天文台,上海市南丹路80号,200030;中国科学院大学,北京市玉泉路19号甲,100049;中国科学院上海天文台,上海市南丹路80号,200030 |
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| 基金项目： | 国家重点研发计划;上海张江国家自主创新示范区专项发展资金重大项目;广东省重点研发计划;国家自然科学基金 |
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| 摘 要： | 通过比较GLONASS广播星历与精密星历发现，GLONASS广播星历卫星钟差误差的主导因素为未标定的设备延迟参数。基于测站伪距残差分析，将卫星端与接收机端的IFB进行分离，建立广播星历的频间偏差和伪距定位改进模型，并对定位改进模型进行动态定位验证。结果表明，采用该模型的定位精度在N、E、U方向上分别平均提升51.1%、41.7%、48.3%。
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| 关 键 词： | GLONASS 频分多址技术 频间码偏差 伪距残差分析 伪距定位改进模型 |
A Modified GLONASS Pseudorange Positioning Model to Estimated Satellite-Dependent IFB and Its Verification |
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| LIU Jiao,CHEN Junping,WANG Bin.A Modified GLONASS Pseudorange Positioning Model to Estimated Satellite-Dependent IFB and Its Verification[J].Journal of Geodesy and Geodynamics,2021,41(1):27-33. |
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| Authors: | LIU Jiao CHEN Junping WANG Bin |
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| Institution: | (Shanghai Astronomical Observatory,CAS,80 Nandan Road,Shanghai 200030,China;University of Chinese Academy of Sciences,A19 Yuquan Road,Beijing 100049,China) |
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| Abstract: | In this paper, we analyze the difference between GLONASS broadcast ephemeris and GLONASS precise ephemeris. The results show that uncalibrated equipment delay parameter is the predominant factor of the GLONASS broadcast ephemeris clock error. Based on pseudorange residuals analysis, the IFBs of stations and satellites are separated. A modified model of IFB and pseudorange positioning of broadcast ephemeris is proposed. The modified model is verified by dynamic positioning. The results show that the precision has been improved by 51.1%, 41.7%, 48.3% in N,E,U components, respectively. |
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| Keywords: | GLONASS FDMA IFB pseudorange residuals analysis modified pseudorange positioning model |
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