Evaluation of real-time variometric approach and real-time precise point positioning in monitoring dynamic displacement based on high-rate (20 Hz) GPS Observations

Bezcioğlu, Mert; Yiğit, Cemal Özer; Karadeniz, Baris; Dindar, Ahmet Anıl; El‐Mowafy, Ahmed; AVCI, Özgür

doi:10.1007/s10291-022-01381-6

Cited by 12 publications

(6 citation statements)

References 37 publications

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“…Moreover, the outcomes emphasize that the SF-VA technique can also detect the amplitude value corresponding to the peak frequency at mm-level precision. These findings are in strong agreement with those obtained from Bezcioglu et al [11,18]. However, it is important to note that, unlike these two investigations, this contribution evaluates low-cost GNSS observations.…”

Section: Discussionsupporting

confidence: 91%

“…This disadvantage of the RTK technique has been eliminated with the introduction of the precise point positioning (PPP) technique, which is based on precise orbit and clock products for high precision requirements [8,9]. Thanks to the availability of International GNSS Service (IGS) RT products, it has become possible to apply the PPP technique in RT, and the potential of the RT-PPP technique to be successfully applied in SHM and EEW systems has been revealed [10,11]. However, it should be noted here that the RT-PPP technique requires an external internet infrastructure to acquire the precise products needed in RT, and similar to the RTK method, this requirement inevitably renders the RT-PPP technique inaccessible in the event of a potential megaearthquake.…”

Section: Introductionmentioning

confidence: 99%

“…The variometric approach (VA), which was introduced to the GNSS community by Colosimo et al, is a powerful technique that enables the determination of dynamic behaviors with high accuracy by using broadcast ephemerides with a stand-alone GNSS receiver without requiring an internet infrastructure or external GNSS, unlike the aforementioned techniques [12]. The potential of the VA technique for SHM and EEW systems in RT mode has been highlighted in some investigations [11,13]. Furthermore, it is worth mentioning here that the newly developed BeiDou and Galileo, revitalized GLONASS, and modernized GPS satellite constellations provide great opportunities to obtain highaccuracy displacement information for GNSS-based operated SHM and EEW systems [14].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the single-frequency variometric approach based on low-cost GNSS observations and different satellite combinations for detecting short-term dynamic behaviors

Bahadur,

Bezcioglu,

Yigit

2024

Meas. Sci. Technol.

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This study presents the capability of the single-frequency (SF) variometric approach (VA) technique with low-cost GNSS observations to detect short-term dynamic behaviors. Harmonic oscillations with amplitudes between 5 and 20 mm and frequencies between 0.3 and 5.0 Hz were generated employing a single-axis shake table to investigate the performance of the SF-VA technique in the Structural Health Monitoring (SHM) system. Besides, a Mw 6.9 Kobe, 1995 earthquake simulation was generated using the shake table to analyze the SF-VA performance for the Earthquake Early Warning (EEW) system. A low-cost u-blox ZED-F9P GNSS receiver and ANN-MB-00 patch antenna were used to collect GNSS observations at a 20 Hz sampling rate during the experiments. The observations were processed using the MATLAB-based open-source PPPH-VA software in real-time mode, considering eight different satellite combinations. The capability of the SF-VA technique to detect horizontal dynamic behaviors in real-time mode was investigated in the frequency and time domains, accepting the displacements from the Linear Variable Differential Transformer (LVDT) sensor as a reference. The results in the frequency domain demonstrate that the SF-VA technique with low-cost GNSS observations can successfully detect the peak frequency value of short-term harmonic oscillations up to 5 Hz. Moreover, time domain findings emphasize that the short-time dynamic oscillations can be determined with the SF-VA technique with an accuracy ranging from 0.8 to 6.4 mm. Earthquake simulation experiment results demonstrate that the strong ground motions caused by mega earthquakes can be determined at mm-level by the SF-VA method. The results of both experiments show that multi-GNSS observations contribute to the SF-VA technique considerably. Overall, the findings reveal that the SHM and EEW systems can be operated with low-cost GNSS receivers, and the natural frequency of the man-made structures and accurate displacement values of seismic waveforms can be determined in real-time with the SF-VA technique.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of the single-frequency variometric approach based on low-cost GNSS observations and different satellite combinations for detecting short-term dynamic behaviors

Bahadur,

Bezcioglu,

Yigit

2024

Meas. Sci. Technol.

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“…In Nowadays, GNSS technology and different positioning algorithms are used in order to monitor the surface waveforms before, during and after the earthquake and to determine the co-seismic displacements [14][15][16][17][18][19][20]. High-precision 3D position information from GNSS data plays an important role in detecting dynamic behavior on the fault [21].…”

Section: International Journal Of Environmental Sciences and Natural ...mentioning

confidence: 99%

Investigation of Seismic Waveform and Co-seismic Displacements Based on GNSS Observations at CORS-TR Stations of Sofalaca-Şehitkamil Gaziantep (Mw:7.7) Earthquake on February 6, 2023 by Kinematic-Precise Point Positioning Technique

Karadeniz

2023

IJESNR

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The high pressure created by the stretching or compression of the rocks on the earth causes the earth's crust to break and faults occur. These faults are found in many parts of the world and are actively seen in Türkiye. In this study, space and satellite techniques and geodetic results of the Sofalaca-Şehitkamil Gaziantep earthquake that occurred on the Eastern Anatolian Fault Zone on 06.02.2023 in Türkiye were evaluated. Stations recording GNSS observations at 1Hz sampling interval of the network of Continuously Operating Reference Stations, Türkiye (CORS-TR) were used, homogeneously distributed in and around the epicenter where the earthquake occurred. In order to examine the characteristics of the surface movements occurring at the time of the earthquake, the Kinematic-PPP technique and the 1 second RINEX data in the RTKLIB software were evaluated with both real-time and post-process solution approaches. With both solution approaches, displacement amounts and velocities, of the surface waveforms occurring at the time of the earthquake were calculated at all stations. In addition, the co-seismic displacements of the selected 23 stations after the earthquake were calculated and the changes on the surface of the earthquake were interpreted. At GNSS Stations, the maximum velocities during the earthquake were calculated in the range of 1.6-23.3cm/s for the north component, 0.5-13.5cm/s for the east component, and 1.9-24.6cm/s for the up component. The post-earthquake co-seismic displacements at stations were determined as 0.1-37.1 cm for the north component, 0.1-22.7cm for the east component and 0.1-20.0cm for the up component.

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“…The outcomes demonstrated that the increase in the frequency number improves the position accuracy and ambiguity resolution. Bezcioglu et al [33][34] collected GNSS observations both static and kinematic mode on two different days with a Zodiac boat on Livingston Island on the Antarctic Peninsula, and the GNSS data processed by the traditional-PPP and PPP-AR technique were compared with the relative positioning technique. The results obtained in the study clearly expressed the superiority of the PPP-AR technique over the traditional-PPP method.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the capability of multi-GNSS PPP-AR method in detecting permanent displacements

Bezcioğlu

UCAR

Yiğit

2023

International Journal of Engineering and Geosciences

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Although the traditional-Precise Point Positioning (PPP) technique, may provide a positioning as precise as the relative positioning technique in long-term observation durations since it has the inability to provide high-precise positioning due to ambiguity problem in short-term observations, the interest in the PPP-AR (Ambiguity Resolution) technique has increased. The main purpose of this study is to investigate the performance of traditional-PPP and PPP-AR techniques for monitoring permanent displacements, considering different observation durations based on different satellite combinations. For this purpose, a displacement simulator that can move precisely in one direction and in the horizontal plane over a small distance was used. 6 different displacements were simulated, and all collected GNSS observations were evaluated with traditional-PPP, PPP-AR, and relative methods. Moreover, these methods were examined by considering the Global Positioning System (GPS), European Global Navigation Satellite System (Galileo), and GPS/Galileo satellite combinations. The findings clearly demonstrate that the superiority of the PPP-AR technique over the traditional-PPP technique in short-term observation durations and emphasize that the contribution of multi-GNSS (Global Navigation Satellite System) combinations to both methods.

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Evaluation of real-time variometric approach and real-time precise point positioning in monitoring dynamic displacement based on high-rate (20 Hz) GPS Observations

Cited by 12 publications

References 37 publications

Evaluation of the single-frequency variometric approach based on low-cost GNSS observations and different satellite combinations for detecting short-term dynamic behaviors

Evaluation of the single-frequency variometric approach based on low-cost GNSS observations and different satellite combinations for detecting short-term dynamic behaviors

Investigation of Seismic Waveform and Co-seismic Displacements Based on GNSS Observations at CORS-TR Stations of Sofalaca-Şehitkamil Gaziantep (Mw:7.7) Earthquake on February 6, 2023 by Kinematic-Precise Point Positioning Technique

Investigation of the capability of multi-GNSS PPP-AR method in detecting permanent displacements

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