面向全频率非差模糊度固定的相位钟/相位偏差估计方法
P228; 非差模糊度固定是GNSS精密单点定位(PPP)的关键技术.传统的PPP方法通常依赖特定的基准频率(如GPS L1/L2)信号构建无电离层组合观测模型,模糊度固定(ambiguity resolution,AR)所必需的卫星钟差和相位偏差产品被迫与这些预定的观测模型和信号频率绑定,限制了用户选择的灵活性.为满足用户 自由选择信号频率实现高精度定位的需求,本文提出"全频率相位钟/相位偏差"的估计方法,利用非差整数模糊度约束的网解估计相位钟和观测值信号偏差产品,同时保证其遵从IGS的经典钟差/偏差基准,以实现适用于任意观测模型和信号频率的PPP-AR.在197个IGS...
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| Published in | 测绘学报 Vol. 53; no. 12; pp. 2254 - 2267 |
|---|---|
| Main Authors | , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国科学院精密测量科学与技术创新研究院,湖北武汉 430071%武汉大学卫星导航定位技术研究中心,湖北武汉 430079%中国科学院精密测量科学与技术创新研究院,湖北武汉 430071%航天恒星科技有限公司,北京 100194
2024
武汉大学卫星导航定位技术研究中心,湖北武汉 430079 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-1595 |
| DOI | 10.11947/j.AGCS.2024.20230060 |
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| Abstract | P228; 非差模糊度固定是GNSS精密单点定位(PPP)的关键技术.传统的PPP方法通常依赖特定的基准频率(如GPS L1/L2)信号构建无电离层组合观测模型,模糊度固定(ambiguity resolution,AR)所必需的卫星钟差和相位偏差产品被迫与这些预定的观测模型和信号频率绑定,限制了用户选择的灵活性.为满足用户 自由选择信号频率实现高精度定位的需求,本文提出"全频率相位钟/相位偏差"的估计方法,利用非差整数模糊度约束的网解估计相位钟和观测值信号偏差产品,同时保证其遵从IGS的经典钟差/偏差基准,以实现适用于任意观测模型和信号频率的PPP-AR.在197个IGS MGEX(multi-GNSS)测站的静态数据和车载动态数据中进行的PPP-AR解算试验证明,本文的GPS/Galileo/BDS全频率相位钟/相位偏差产品可在任意频率组合上保持相对一致的模糊度固定效率和静动态定位精度.本文强调,非差整数模糊度约束的网解确保相位钟/相位偏差的严格耦合,是保证全频率非差模糊度固定能力的关键.从2023年开始,武汉大学以快速产品的形式日常发布上述全频率相位钟/相位偏差产品(ftp://igs.gnsswhu.cn/pub/whu/phasebias/). |
|---|---|
| AbstractList | P228; 非差模糊度固定是GNSS精密单点定位(PPP)的关键技术.传统的PPP方法通常依赖特定的基准频率(如GPS L1/L2)信号构建无电离层组合观测模型,模糊度固定(ambiguity resolution,AR)所必需的卫星钟差和相位偏差产品被迫与这些预定的观测模型和信号频率绑定,限制了用户选择的灵活性.为满足用户 自由选择信号频率实现高精度定位的需求,本文提出"全频率相位钟/相位偏差"的估计方法,利用非差整数模糊度约束的网解估计相位钟和观测值信号偏差产品,同时保证其遵从IGS的经典钟差/偏差基准,以实现适用于任意观测模型和信号频率的PPP-AR.在197个IGS MGEX(multi-GNSS)测站的静态数据和车载动态数据中进行的PPP-AR解算试验证明,本文的GPS/Galileo/BDS全频率相位钟/相位偏差产品可在任意频率组合上保持相对一致的模糊度固定效率和静动态定位精度.本文强调,非差整数模糊度约束的网解确保相位钟/相位偏差的严格耦合,是保证全频率非差模糊度固定能力的关键.从2023年开始,武汉大学以快速产品的形式日常发布上述全频率相位钟/相位偏差产品(ftp://igs.gnsswhu.cn/pub/whu/phasebias/). |
| Abstract_FL | Undifferenced ambiguity resolution is a crucial technology for GNSS precision point positioning(PPP).The conven-tional PPP method typically uses ionosphere-free combination observations on the specific baseline frequencies(e.g.,GPS L1/L2).Therefore,the satellite clock and phase bias products required for ambiguity resolution(AR)are bounded to these speci-fied observation models and signal frequencies,which significantly limits the user's choice.To meet the user's demand for high-precision positioning with free choice of signal frequencies,this paper proposes an estimation method of"all-frequency phase clock/bias",which employs the undifferenced integer ambiguity constraints on the network processing to estimate phase clock and observable-specific signal bias(OSB)products.While ensuring their consistency with the datum of IGS(International GNSS Service)legacy clock and bias,these products enable the PPP ambiguity resolution applicable to arbitrary observation model and frequency choices.Both a 31-day test on 197 IGS MGEX(multi-GNSS experiment)stations and a kinematic test on car-borne data demonstrate that the GPS/Galileo/BDS all-frequency phase clock/bias product proposed by this paper maintains relatively consistent ambiguity resolution efficiency and static/kinematic positioning accuracy over any frequency combination in PPP-AR.In particular,we emphasize that the undifferenced integer ambiguity constraint applied to the network processing plays a vital role in guaranteeing the strict coupling of the satellite phase clock/bias products,which is essential to ensure the capability of all-frequency undifferenced ambiguity resolution.The all-frequency phase clock/bias products from Wuhan Uni-versity(ftp://igs.gnsswhu.cn/pub/whu/phasebias/)have been released since 2023 as a rapid routine service. |
| Author | 张启元 金彪 温强 曾竞 耿江辉 林吉航 |
| AuthorAffiliation | 武汉大学卫星导航定位技术研究中心,湖北武汉 430079;中国科学院精密测量科学与技术创新研究院,湖北武汉 430071%武汉大学卫星导航定位技术研究中心,湖北武汉 430079%中国科学院精密测量科学与技术创新研究院,湖北武汉 430071%航天恒星科技有限公司,北京 100194 |
| AuthorAffiliation_xml | – name: 武汉大学卫星导航定位技术研究中心,湖北武汉 430079;中国科学院精密测量科学与技术创新研究院,湖北武汉 430071%武汉大学卫星导航定位技术研究中心,湖北武汉 430079%中国科学院精密测量科学与技术创新研究院,湖北武汉 430071%航天恒星科技有限公司,北京 100194 |
| Author_FL | ZENG Jing WEN Qiang LIN Jihang ZHANG Qiyuan JIN Biao GENG Jianghui |
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| DocumentTitle_FL | Phase clock/bias estimation for GNSS all-frequency undifferenced ambi-guity resolution |
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| Keywords | undifferenced ambiguity resolution 相位钟差 all-frequency PPP-AR phase clock 多系统GNSS 非差模糊度固定 phase bias 相位偏差 multi-GNSS 全频率PPP-AR |
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| Publisher | 中国科学院精密测量科学与技术创新研究院,湖北武汉 430071%武汉大学卫星导航定位技术研究中心,湖北武汉 430079%中国科学院精密测量科学与技术创新研究院,湖北武汉 430071%航天恒星科技有限公司,北京 100194 武汉大学卫星导航定位技术研究中心,湖北武汉 430079 |
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| Title | 面向全频率非差模糊度固定的相位钟/相位偏差估计方法 |
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