| GPS/BDS/Galileo三频精密单点定位模型及性能分析 |
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| 引用本文： | 周锋,徐天河. GPS/BDS/Galileo三频精密单点定位模型及性能分析[J]. 测绘学报, 2021, 50(1): 61-70. DOI: 10.11947/j.AGCS.2021.20200146 |
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| 作者姓名： | 周锋 徐天河 |
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| 作者单位： | 山东科技大学测绘科学与工程学院,山东 青岛 266590;山东大学空间科学研究院,山东威海264209 |
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| 基金项目： | 国家自然科学基金（41904027；41904011）；中国博士后科学基金（2020M673669）；大地测量与地球动力学国家重点实验室开放研究基金（SKLGED2020-3-2-E）；山东省自然科学基金（ZR2019QD003） |
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| 摘 要： | 在精细考虑伪距和载波相位硬件偏差时变特性的基础上,导出了更为严谨的非差非组合观测方程,并给出了非组合模式下两类GNSS偏差的数学表达形式.基于此,本文详细研究了3种常用的三频精密单点定位(PPP),即无电离层两两组合IF1213、单个无电离层组合IF123与非组合UC123函数模型的独立参数化方法,系统分析了3种PPP...
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| 关 键 词： | GPS/BDS/Galileo 精密单点定位 GNSS偏差 三频观测值 定位性能 |
| 收稿时间： | 2020-04-21 |
| 修稿时间： | 2020-11-13 |
Modeling and assessment of GPS/BDS/Galileo triple-frequency precise point positioning |
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| ZHOU Feng,XU Tianhe. Modeling and assessment of GPS/BDS/Galileo triple-frequency precise point positioning[J]. Acta Geodaetica et Cartographica Sinica, 2021, 50(1): 61-70. DOI: 10.11947/j.AGCS.2021.20200146 |
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| Authors: | ZHOU Feng XU Tianhe |
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| Affiliation: | 1. College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, China;2. Institute of Space Science, Shandong University, Weihai 264209, China |
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| Abstract: | With careful consideration of time-varying characteristics of pseudorange and carrier phase hardware biases, more rigorous undifferenced and uncombined observation equations are derived, and the mathematical expressions of the two types of GNSS biases in uncombined mode are given. Based on this, this contribution studied independent parameterization methods of three commonly used triple-frequency precise point positioning (PPP) (i.e., ionosphere-free combination IF1213 and IF123 as well as uncombination UC123) function models in detail, and systematically analyzed the relationship among these models. Subsequently, the positioning performance in terms of positioning accuracy for GPS/BDS/Galileo triple-frequency PPP in static and kinematic modes was assessed. The experimental results showed that the positioning accuracy after convergence for static PPP was better than 1.0 and 1.5 cm; while that for kinematic PPP was better than 2.0 and 5.0 cm in horizontal and vertical components, respectively. Moreover, the positioning performance of triple-frequency and dual-frequency PPP was comparable. |
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| Keywords: | GPS/BDS/Galileo precise point positioning GNSS bias triple-frequency observation positioning performance |
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