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Modeling and Assessment of GPS/Galileo/BDS Precise Point Positioning with Ambiguity Resolution

Xuexi Liu, Hua Chen, Weiping Jiang, Ruijie Xi, Wen Zhao, Chuanfeng Song, Xingyu Zhou
2019 Remote Sensing  
In this paper, GPS/Galileo/BeiDou (BDS) precise point positioning (PPP) with ambiguity resolution (AR) are discussed in detail.  ...  The average root mean squares (RMSs) of the float and the fixed solution in the east and north direction for GPS/Galileo/BDS combined system are the smallest, being 0.92 cm, 0.52 cm and 0.50 cm, 0.46 cm  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs11222693 fatcat:cwey5we2rrb3rbhlfzzd2bugei

Assessment of GPS/Galileo/BDS Precise Point Positioning with Ambiguity Resolution Using Products from Different Analysis Centers

Chao Chen, Guorui Xiao, Guobin Chang, Tianhe Xu, Liu Yang
2021 Remote Sensing  
The positioning performance in terms of positioning accuracy, convergence time and fixing rate (FR) as well as time to first fix (TTFF), was assessed by static and kinematic PPP AR models.  ...  Ambiguity resolution (AR) is the key to a fast convergence time and a high-precision solution for PPP technology and PPP AR products are critical to implement PPP AR.  ...  Acknowledgments: We would like to thank the IGS analysis centers for providing GNSS ground tracking data, precise orbit and clock products, and PPP AR products.  ... 
doi:10.3390/rs13163266 fatcat:edm43cngwvgablux6dxxgvmgh4

Assessing IGS GPS/Galileo/BDS-2/BDS-3 phase bias products with PRIDE PPP-AR

Jianghui Geng, Songfeng Yang, Jiang Guo
2021 Satellite Navigation  
AbstractAmbiguity Resolution in Precise Point Positioning (PPP-AR) is important to achieving high-precision positioning in wide areas.  ...  Due to the insufficient number of BDS satellites during 2019, the BDS phase bias products perform worse than the GPS/Galileo products in terms of ambiguity fixing rates and daily positioning precisions  ...  SGG provides GPS/Galileo/BDS/QZSS wide-lane and narrow-lane UPD products at https:// github. com/ FCB-SGG/ FCB-FILES/.  ... 
doi:10.1186/s43020-021-00049-9 fatcat:3ulxomih6zb4lg6rtsv62fxojy

Low-cost, 4-system, precise GNSS positioning: a GPS, Galileo, BDS and QZSS ionosphere-weighted RTK analysis

Robert Odolinski, Peter J G Teunissen
2017 Measurement science and technology  
With the combination of the emerging GNSSs, single-frequency (SF) precise RTK positioning becomes possible.  ...  The formal and empirical ambiguity success rates and positioning precisions will first be evaluated while making use of L1 + E1, so as to investigate whether instantaneous SF RTK is possible without the  ...  Low-cost GPS+Galileo RTK positioning We begin by analyzing the current SF L1+E1 GPS+Galileo RTK model, since it will allow us to assess whether lowcost precise RTK positioning is possible using the global  ... 
doi:10.1088/1361-6501/aa92eb fatcat:uoc7757jubegxe2kpvwlm5cxke

Differential Inter-System Biases Estimation and Initial Assessment of Instantaneous Tightly Combined RTK with BDS-3, GPS, and Galileo

Wu, Liu, Wang, Zhang
2019 Remote Sensing  
ambiguity dilution of precision (ADOP), ratio values, the empirical ambiguity resolution success rate, and the positioning accuracy.  ...  Experimental results demonstrate that the tightly combined model can deliver much lower ADOP and higher ratio values with respect to the classical loosely combined model whether for GPS/BDS-3 or GPS/Galileo  ...  Acknowledgments: Figure 2 is plotted using RTKLIB (An Open Source Program Package for GNSS Positioning) developed by Tomoji Takasu from Tokyo University of Marine Science and Technology, which is acknowledged  ... 
doi:10.3390/rs11121430 fatcat:sxoxxpo3gfdmlaqqeqzogg4ufa

Estimation of fractional cycle bias for GPS/BDS-2/Galileo based on international GNSS monitoring and assessment system observations using the uncombined PPP model

Jin Wang, Qin Zhang, Guanwen Huang
2021 Satellite Navigation  
AbstractThe Fractional Cycle Bias (FCB) product is crucial for the Ambiguity Resolution (AR) in Precise Point Positioning (PPP).  ...  The results indicate that precise and reliable positioning can be achieved with the PPP AR of GPS/BDS-2/Galileo, supported by multi-GNSS satellite orbit, clock, and FCB products based on iGMAS.  ...  Introduction Precise Point Positioning (PPP) Ambiguity Resolution (AR) is important to obtain the positioning accuracy at centimeter-level in a short time at a station (Bisnath and Gao 2008; Wang et al  ... 
doi:10.1186/s43020-021-00039-x fatcat:qf5kfjkjxzhtxif4cloejd646y

GNSS Receiver-Related Pseudorange Biases: Characteristics and Effects on Wide-Lane Ambiguity Resolution

Lingyue Cheng, Wei Wang, Jingnan Liu, Yifei Lv, Tao Geng
2021 Remote Sensing  
Such biases will lead to adverse effects for differential code bias (DCB) and satellite clock estimation, single point positioning (SPP) and precise point positioning (PPP) applications with pseudoranges  ...  Among GPS/Galileo/BDS, Galileo shows the smallest pseudorange biases, and the obvious inconsistences of pseudorange biases are observed between BDS-2 and BDS-3, and Galileo in-orbit validation (IOV) satellites  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs13030428 fatcat:mxt72hjto5dl7k4nn2veqj4o3a

Assessment of BeiDou-3 and Multi-GNSS Precise Point Positioning Performance

Guoqiang Jiao, Shuli Song, Yulong Ge, Ke Su, Yangyang Liu
2019 Sensors  
It is meaningful to evaluate the ability of global precise point positioning (PPP) of the GPS, BDS, GLONASS, and Galileo.  ...  The assessment of GPS, BDS-2, BDS-2/BDS-3, GLONASS, Galileo, and multi-GNSS global PPP performance are shown to make comments for the development of multi-GNSS integration, global precise positioning,  ...  Acknowledgments: The authors gratefully acknowledge WHU for providing GPS, BDS-2, BDS-3, GLONASS and Galileo precise orbit and clock products.  ... 
doi:10.3390/s19112496 fatcat:hx3mnfsvjzdmldzshghfayllgi

Integrity Monitoring of PPP-RTK Positioning; Part II: LEO Augmentation

Kan Wang, Ahmed El-Mowafy, Wei Wang, Long Yang, Xuhai Yang
2022 Remote Sensing  
The LEO augmentation also improves the efficiency of the user ambiguity resolution and the formal horizontal precision with the ambiguities fixed.  ...  The rapid geometry change with the LEO augmentation offers acceleration of the convergence of the precision point positioning (PPP) solution.  ...  and GPS/Galileo/BDS-combined (GEC).  ... 
doi:10.3390/rs14071599 fatcat:hwtzsdv5enbdtl5d2e5djstslq

Assessing the Performance of Multi-GNSS PPP-RTK in the Local Area

Hongyang Ma, Qile Zhao, Sandra Verhagen, Dimitrios Psychas, Xianglin Liu
2020 Remote Sensing  
The combined GNSS cases, on the contrary, reduce the horizontal RMS of GPS alone with 2 cm level to GPS + Galileo/GPS + Galileo + BDS/GPS + Galileo + BDS + GLONASS with 1 cm level.  ...  solutions; moreover, with the same criterion, the convergence time of GE ambiguity fixed solutions is 19 min, which is better than GPS + Galileo + BDS + GLONASS ambiguity float solutions with 28.5 min.  ...  The authors are thankful to the Center for Orbit Determination in Europe for providing the precise satellite orbits. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs12203343 fatcat:ytmqvzh5yfdnxm7izp7jwykngq

An analysis of multi-GNSS observations tracked by recent Android smartphones and smartphone-only relative positioning results

Jacek Paziewski, Marco Fortunato, Augusto Mazzoni, Robert Odolinski
2021 Measurement (London)  
Finally, the positioning experiment proves that it is feasible to obtain a precise cm-level solution of a smartphone to smartphone relative positioning with fixed integer ambiguities.  ...  In this study we assess the quality of multi-GNSS observations of recent Android smartphones.  ...  Dr Robert Odolinski is funded by Geoscience Australia to work on the project "Precise GNSS positioning with smartphones". Dr Jacek Paziewski is founded by the project No.  ... 
doi:10.1016/j.measurement.2021.109162 fatcat:4xhn45v6urfurjvm7gq2r7bkje

Comprehensive assessment of real-time precise products from IGS analysis centers

Bofeng Li, Haibo Ge, Yuhang Bu, Yanning Zheng, Leitong Yuan
2022 Satellite Navigation  
AbstractReal-Time Precise Point Positioning (RT-PPP) has been one of the research hotspots in GNSS (Global Navigation Satellite System) community for decades.  ...  Meanwhile, the results of the RT-PPP with quad-system show that the positioning accuracies are 1.76, 1.12 and 2.68 cm in east, north, and up directions, respectively, and the convergence time to 0.1, 0.1  ...  PPP Ambiguity Resolution (PPP-AR) is proposed to shorten the convergence time and obtain centimeter-level precision of positioning right after ambiguity fixing (Laurichesse and Mercier, 2007; Collins,  ... 
doi:10.1186/s43020-022-00074-2 fatcat:ybreiynzgred7irfdxrgemcs2y

A Unified Model for Multi-Frequency PPP Ambiguity Resolution and Test Results with Galileo and BeiDou Triple-Frequency Observations

Guorui Xiao, Pan Li, Yang Gao, Bernhard Heck
2019 Remote Sensing  
The additional signals are expected to enhance the performance of precise point positioning (PPP) with ambiguity resolution (AR).  ...  The estimated FCB are assessed with respect to residual distributions and standard deviations.  ...  This work was supported in part by the National Natural Science Foundation of China (grants Nos. 41674016, 41274016 and 41604024). Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs11020116 fatcat:2w2viaq3cfgd7jprq6d7y6ekv4

EFFECT OF SPATIAL CORRELATION ON THE PERFORMANCES OF MODERNIZED GPS AND GALILEO IN RELATIVE POSITIONING

Noureddine Kheloufi, Abdelhalim Niati
2020 Geodesy and Cartography  
The performances studied include: the time to fix the ambiguities with high success rate and the precision of coordinates in static relative positioning with varying baseline length.  ...  For all the dualfrequency combinations investigated, when processing a baseline length of 500 km with accounted spatial correlation, the time needed to successfully fix the ambiguities lies between 5 and  ...  When the integer ambiguities are parameterized within a strong model and then fixed by an appropriate ambiguity resolution technique, this allows to achieve a fast and precise positioning.  ... 
doi:10.3846/gac.2020.11009 fatcat:z42tvp3uifgstofxiwctdyezme

PPP-RTK considering the ionosphere uncertainty with cross-validation

Pan Li, Bobin Cui, Jiahuan Hu, Xuexi Liu, Xiaohong Zhang, Maorong Ge, Harald Schuh
2022 Satellite Navigation  
AbstractWith the high-precision products of satellite orbit and clock, uncalibrated phase delay, and the atmosphere delay corrections, Precise Point Positioning (PPP) based on a Real-Time Kinematic (RTK  ...  In the ionosphere-weighted PPP–RTK model, not only the a priori value of ionosphere but also its precision affect the convergence and accuracy of positioning.  ...  Acknowledgements We thank EPN and SONEL for providing the GNSS data.  ... 
doi:10.1186/s43020-022-00071-5 fatcat:pjpus2lkjvgp5cisf3jdq52xti
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