Real-time single-frequency precise positioning with Galileo satellites

Bahadur, Berkay

doi:10.1017/s037346332100076x

Cited by 6 publications

(2 citation statements)

References 53 publications

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“…IGS provides realtime satellite orbit and clock products to users who want to obtain RT-PPP solutions through IGS RT Service (RTS). (Chen et al, 2018;Wang et al, 2018b;Bahadur, 2021). IGS also offers users combined real-time analysis products that allow post-mission PPP under real-time conditions.…”

Section: Introductionmentioning

confidence: 99%

High-rate real-time single-frequency PPP for structural motion detection in horizontal directions

Bezcioğlu

Karadeniz

Yiğit

et al. 2022

Proceedings of the 5th Joint International Symposium on Deformation Monitoring - JISDM 2022

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Thanks to advances in receiver and software technology, the high-rate GPS (Global Positioning System) technique has become very important in monitoring the dynamic behavior of man-made structures in both real-time and post-missions. Real-time monitoring of the changes in the behavior of structures due to effects such as natural disasters, wind effect, traffic loading is critical in order to take precautions in time. In this study, the performance of the Real-Time Single Frequency Precision Point Positioning (RT SF-PPP) method based on IGS (International GNSS Service) RTS (real-time stream) products to capture the behavior of dynamic motions was evaluated. The performance of the SF RT-PPP method to detect dynamic behaviors was evaluated based on 20 Hz single frequency GPS observations obtained from shake table experiments, including 10 mm amplitude and different oscillation frequencies including 0.1, 0.6, 1.0, 2.0 and 3.0 Hz. RT SF-PPP results were compared with reference LVDT (Linear Variable Differential Transformer) and relative (or double difference) GPS positioning both frequency and time domain. Results show that the high-rate RT SF-PPP method can capture the frequencies and amplitudes of harmonic motions and it is comparable to LVDT and Relative GPS positioning solutions. These results show that the high-rate RT SF-PPP method can monitor earthquake-induced real-time vibration frequencies and amplitudes, which is especially important for early warning systems.

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Section: Introductionmentioning

confidence: 99%

High-rate real-time single-frequency PPP for structural motion detection in horizontal directions

Bezcioğlu

Karadeniz

Yiğit

et al. 2022

Proceedings of the 5th Joint International Symposium on Deformation Monitoring - JISDM 2022

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“…Birden fazla navigasyon sisteminin ortak GNSS çözümüne dahil edilmesi, diğer bir deyişle çoklu GNSS yöntemleri sağladığı ilave uydu ve sinyal kaynağı sayesinde PPP çözümlerinin konum belirleme performansını kayda değer oranda iyileştirmektedir (Bahadur & Nohutcu, 2018;Cai, Gao, Pan, & Zhu, 2015;Li vd., 2015;Pan, Zhang, Liu, Li, & Li, 2017). Buna ek olarak Galileo ve BDS uydu sayısının kayda değer oranda artmasıyla birlikte bu sistemlerin konum belirleme uygulamaları açısından bireysel performansları da son yıllarda birçok araştırmacı tarafından incelenmiştir (Bahadur, 2022;Ge, Ding, Qin, Zhou, & Yang, 2020;Ge vd., 2021;Hadas, Kazmierski, & Sosnica, 2019;Zhu vd., 2021).…”

Section: Introductionunclassified

Küresel BeiDou Sistemi (BDS-3) için hassas nokta konumlama performansının değerlendirilmesi

Bahadur¹

2022

J Geod Geoinf

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The main objective of this study is to evaluate the positioning performance of the global BeiDou system (BDS-3) in terms of Precise Point Positioning (PPP). The PPP performance of BDS-3 was compared with both GPS and the regional BeiDou system (BDS-2). In addition, the contribution of BDS-3 to the PPP performance was analyzed through multi-GNSS combinations of these three systems. For this purpose, seven processing scenarios in total were composed, and the observation dataset collected at 15 International GNSS Service (IGS) stations over the period of November 21 and 30, 2021 were processed under these scenarios. The results showed that positioning accuracies of 0.0152, 0.0605, and 0.0203 m could be acquired from the GPS, BDS-2, and BDS-3 PPP solutions, respectively. Also, average convergence times obtained from these solutions were respectively computed as 60.94, 261.71, and 63.06 minutes. While results of the BDS-2 PPP solution remained substantially behind the GPS results, comparable results with the GPS PPP were acquired from the BDS-3 PPP solution. Besides, the obtained results revealed that the positioning performance could be improved significantly when double and triple combinations of these navigation systems were employed. The positioning accuracy and convergence time obtained from the PPP solution where GPS, BDS-2, and BDS-3 systems were used in common were 0.0136 m and 26.45 minutes. In this study, tropospheric delay estimations were also evaluated to analyze the PPP performance comprehensively. The results demonstrated that the BDS-3 solution could provide close results to the GPS PPP solution in terms of tropospheric delay estimation and the best troposphere estimation performance could similarly be acquired from the multi-GNSS solution where three systems were employed in common.

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