Galileo Augmenting GPS Single-Frequency Single-Epoch Precise Positioning with Baseline Constrain for Bridge Dynamic Monitoring

Zhang, Qiuzhao; Meng, Xiaolin; Xie, Yan; Psimoulis, Panos; Wu, Lai-Yi; Yue, Qingrui; Dai, Xinjun

doi:10.3390/rs11040438

Cited by 14 publications

(11 citation statements)

References 33 publications

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“…This characteristic makes PRM different from other state of the art studies, resulting in the robust results obtained for a concrete bridge [6]- [14].…”

Section: Stage 1: Phase Residue Method-prmmentioning

confidence: 89%

Rigid Bridges Health Dynamic Monitoring Using 100 Hz GPS Single-Frequency and Accelerometers

Neto¹,

Trabanco²,

Larocca³

et al. 2019

POS

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This article presents the modal frequency recordings of a rigid bridge, monitored by the GPS receivers (Global Positioning System) with a data recording rate of 100 Hz and accelerometers. The GPS data processing was performed through the double-difference phase, using the adjusted interferometry technique (i.e. phase residue method-PRM ). In the method, the doubledifference phase of the carrier L1 is realized by using two satellites only, one was positioned at the zenith of the structure and the other satellite was positioned near the horizon. The results of the parametric adjustment of the PRM observations were finalized through software Interferometry, mathematical algorithm were applied and compared with the accelerometer. The comparison served to validate the use of GPS as a fast and reliable instrument for the preliminary monitoring of the dynamic behavior of the bridge, road artworks which are common in several countries, especially in the Brazilian road network. The data time series from the GPS and accelerometers were processed using the Wavelet. The detection of frequencies means that the combination of 100 Hz GPS receivers and the PRM allows detecting vibrations up to 5 mm. It presented significant results which were never obtained by the Fourier Transform.

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“…This characteristic makes PRM different from other state of the art studies, resulting in the robust results obtained for a concrete bridge [6]- [14].…”

Section: Stage 1: Phase Residue Method-prmmentioning

confidence: 89%

Rigid Bridges Health Dynamic Monitoring Using 100 Hz GPS Single-Frequency and Accelerometers

Neto¹,

Trabanco²,

Larocca³

et al. 2019

POS

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“…The residual time series after adopting a site motion model, which is used on the time series of permanent GPS/GNSS stations for analysing crustal deformations and other geophysical phenomena of plate tectonics, were analysed for underlying periodicities by LSSA in Nobakht et al In Erol, the LSSA was used on time series captured by inclination sensors and GPS data for continuous monitoring of a tall building in order to detect natural frequencies and possible anomalies. In Zhang et al, the authors adopted a fast FT algorithm for detecting the local dominant frequencies of two sets of GNSS real bridge data. In Pytharouli and Stiros, discrete FT (here, a 3rd‐order polynomial fitting and a moving window of four observations were used for data interpolation) and Lomb normalised peridogram were adopted to examine whether the geodetically captured displacement time series of monitoring points on the crest of a concrete dam containing periodic signal/s and its/their correlation with the water level fluctuations.…”

Section: Mathematical Backgroundmentioning

confidence: 99%

Analysis of periodicities in long‐term displacement time series in concrete dams

Gamse

Henriques

Oberguggenberger

et al. 2019

Struct Control Health Monit

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The hydrostatic-season-time (HST) model is a widely used method in the safety assessment of dams and for the estimation of reversible and irreversible deformations due to different load scenarios. After implementing an optimal HST-model to observational data, the residual time series can still expose some underlying periodicities. In our contribution, the underlying periodicities and their contribution to residual minimisation are further analysed by the Lomb-Scargle normalised periodogram frequency method. The extended HST-model, obtained by adding additional sinusoidal terms for the statistically most significant frequencies, presents a slight statistical improvement on the optimal HST-model. Statistically significant frequencies may not be justified or correlated to some physical process of the dam, but they make it possible to identify a pattern in the analysed period. The analyses are performed for the radial direction of long-term displacement time series measured at the topmost reading station of an inverted pendulum system in the central cantilever of the Alqueva concrete arch dam. KEYWORDSconcrete arch dam, false alarm probability, hydrostatic-season-time model, Lomb-Scargle normalised periodogram, multiple linear regression

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“…There are also several algorithms that take advantage of a known geometry of two GNSS receivers for precise positioning or attitude estimation. For a GNSS-based attitude determination, the fixed length of a baseline is typically used as a constraint in integer ambiguity search strategies [ 21 , 22 , 23 , 24 , 25 , 26 ]. The author of [ 6 , 21 ] introduced a detailed description of a modified LAMBDA method for a so-called GNSS Compass.…”

Section: Introductionmentioning

confidence: 99%

GNSS Precise Relative Positioning Using A Priori Relative Position in a GNSS Harsh Environment

Kim

2021

Sensors

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To enable Global Navigation Satellite System (GNSS)-based precise relative positioning, real-time kinematic (RTK) systems have been widely used. However, an RTK system often suffers from a wrong integer ambiguity fix in the GNSS carrier phase measurements and may take a long initialization time over several minutes, particularly when the number of satellites in view is small. To facilitate a reliable GNSS carrier phase-based relative positioning with a small number of satellites in view, this paper introduces a novel GNSS carrier phase-based precise relative positioning method that uses a fixed baseline length as well as heading measurements in the beginning of the operation, which allows the fixing of integer ambiguities with rounding schemes in a short time. The integer rounding scheme developed in this paper is an iterative process that sequentially resolves integer ambiguities, and the sequential order of the integer ambiguity resolution is based on the required averaging epochs that vary for each satellite depending on the geometry between the baseline and the double difference line-of-sight vectors. The required averaging epochs with respect to various baseline lengths and heading measurement uncertainties were analyzed through simulations. Static and dynamic field tests with low cost GNSS receivers confirmed that the positioning accuracy of the proposed method was better than 10 cm and significantly outperformed a conventional RTK solution in a GNSS harsh environment.

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Galileo Augmenting GPS Single-Frequency Single-Epoch Precise Positioning with Baseline Constrain for Bridge Dynamic Monitoring

Cited by 14 publications

References 33 publications

Rigid Bridges Health Dynamic Monitoring Using 100 Hz GPS Single-Frequency and Accelerometers

Rigid Bridges Health Dynamic Monitoring Using 100 Hz GPS Single-Frequency and Accelerometers

Analysis of periodicities in long‐term displacement time series in concrete dams

GNSS Precise Relative Positioning Using A Priori Relative Position in a GNSS Harsh Environment

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