Investigating multi-GNSS performance in the UK and China based on a zero-baseline measurement approach

Msaewe, Hussein Alwan Mahdi; Hancock, Craig M.; Psimoulis, Panos; Roberts, Gethin Wyn; Bonenberg, Lukasz

doi:10.1016/j.measurement.2017.02.004

Cited by 30 publications

(36 citation statements)

References 31 publications

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“…Numerous investigations have demonstrated that a multi-GNSS approach (e.g., GPS + BeiDou) is able to improve the performance of real-time-kinematic (RTK) positioning, particularly in urban and mountainous areas, where the lack of visible GPS satellite numbers and multipath reflections limit the performance of RTK [55][56][57][58][59]. However, it has been reported that multi-GNSS observations do not noticeably improve the accuracy of static positioning compared to GPS-only observations; somehow, using multi-GNSS observations can even degrade the accuracy of static positioning compared to using GPS-only observations [60][61][62]. Accordingly, we processed GPS and BeiDou observations separately in this study.…”

Section: Discussionmentioning

confidence: 99%

Detection and Monitoring of Tunneling-Induced Riverbed Deformation Using GPS and BeiDou: A Case Study

et al. 2019

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Shield tunneling under rivers often requires monitoring riverbed deformations in near real-time. However, it is challenging to measure riverbed deformation with conventional survey techniques. This study introduces a comprehensive method that uses the Global Positioning System (GPS) of the USA and the BeiDou navigation satellite system (BeiDou) of China to monitor riverbed deformation during the construction of twin tunnels beneath the Hutuo River in Shijiazhuang, China. A semi-permanent GPS network with one base station outside the river and six rover stations within the river was established for conducting near real-time and long-term monitoring. The distances between the base and the rover antennas are within two kilometers. The network was continuously operating for eight months from April to December 2018. The method is comprised of three components: (1) Monitoring the stability of the base station using precise point positioning (PPP) method, a stable regional reference frame, and a seasonal ground deformation model; (2) monitoring the relative positions of rover stations using the carrier-phase double-difference (DD) positioning method in near real-time; and (3) detecting abrupt and gradual displacements at both base and rover stations using an automated change point detection algorithm. The method is able to detect abrupt positional-changes as minor as five millimeters in near real-time and gradual positional-changes at a couple of millimeters per day within a week. The method has the flexibility of concurrent processing different GPS and BeiDou data sessions (e.g., every 15 minutes, 30 minutes, one hour, one day) for diffident monitoring purposes. This study indicates that BeiDou observations can also achieve few-millimeter-accuracy for measuring displacements. Parallel processing GPS and BeiDou observations can improve the reliability of near real-time structural deformation monitoring and minimize false alerts. The method introduced in this article can be applied to other urban areas for near real-time and long-term structural health monitoring.

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Section: Discussionmentioning

confidence: 99%

Detection and Monitoring of Tunneling-Induced Riverbed Deformation Using GPS and BeiDou: A Case Study

et al. 2019

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“…In the last decade, the potential for using the Global Positioning System (GPS) in structural health monitoring (SHM) has been revealed through experimental studies, which proved its ability in monitoring oscillations of subcentimeter level displacement and high‐rate frequencies,[] and applications to real monitoring of bridges[] and buildings or towers,[] where the GPS monitoring was successfully used to estimate the main characteristics of the structures response. Furthermore, the recent rapid developments in the GPS system, such as 100‐Hz high‐rate receivers,[] the precise point positioning (PPP) solution[] among others, and the contribution of other satellite navigation systems,[] resulting in the Global Navigation Satellite System (GNSS), have lead to further enhancement of the GPS/GNSS solution and increased reliability of the displacement time series. Thus, the potential of real‐time GPS/GNSS monitoring with even a few millimeter accuracy, in an independent coordinate system for short‐ or long‐period monitoring, makes GPS a useful tool for SHM.…”

Section: Introductionmentioning

confidence: 99%

Using the signal-to-noise ratio of GPS records to detect motion of structures

Peppa

Psimoulis

Meng

2017

Struct Control Health Monit

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SUMMARYAlthough major breakthroughs have been achieved during the last decades in the use of GPS technology on Structural Health Monitoring, the mitigation of the biases and errors impeding its positioning accuracy remains a challenge. This paper tests an alternative approach that can increase the reliability of the GPS system in structural monitoring by using the spectral content of the signal-to-noise ratio (SNR) of GPS signals to detect frequencies of antenna vibrations. This approach suggests the potential of using SNR data analysis as a supplement to low-quality positioning solution or as a near real-time alert of excessive vibration proceeding the position solution calculation. Experiments, involving a GPS antenna subjected to vertical vibrations of 0.4-cm to 4.5-cm amplitude at a range of frequencies between 0.007 Hz and 1 Hz, examine the dynamic multipath induced SNR response corresponding to the antenna motion. Synchronised fluctuations in the SNR time series were observed to reflect the antenna motion and their spectral content to include the frequencies of motion. SNR records from the GPS monitoring of the Wilford suspension bridge were used to validate the SNR sensitivity to controlled vibrations of the bridge deck. The natural frequency of 1.64 Hz was extracted from SNR measurements using spectral analysis on a 6-mm amplitude vibration, and the frequency of the semi-static displacement (∼ 0.02 Hz) was revealed in the SNR records permitting, after appropriate filtering, the estimation of a few millimetre semi-static displacement from the GPS time series without the need for any other sensor.

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“…Also, obstructions such as bridge cables and passing vehicles may significantly weaken the satellite geometry . Under circumstance of the weak satellite geometry, integrating GPS with other GNSS constellations is an ideal strategy . Further to the established GPS and GLONASS, BDS and Galileo positioning systems are expected to provide global services upon completion in 2020.…”

Section: Combination Of Gps and Other Gnss Constellationsmentioning

confidence: 99%

Global Navigation Satellite System‐based positioning technology for structural health monitoring: a review

Meng

Yan

et al. 2019

Struct Control Health Monit

108

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Summary Global Navigation Satellite System (GNSS) positioning technology has had widespread applications in the structural health monitoring as its overall performance has improved significantly in the last two decades. It is capable of providing timely and accurate structural vibration information such as dynamic displacements and modal frequencies at higher performance than traditional accelerometers. The studies summarized in this paper focus on the improvement of the multi‐sensors and multi‐constellation data acquisition techniques, the improvement of multiple approaches for erroneous noise mitigation, and innovative modal parameter identification methods. We also detailed the applications of GNSS on the deformation monitoring for towers, chimneys, tall buildings, and bridges. With continuous enhancements in the algorithm and hardware of GNSS, it is expected that the application of GNSS technology can be expanded to other fields such as bridge cable‐force measurements and bridge weight‐in‐motion as well as structural deformation monitoring.

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Investigating multi-GNSS performance in the UK and China based on a zero-baseline measurement approach

Cited by 30 publications

References 31 publications

Detection and Monitoring of Tunneling-Induced Riverbed Deformation Using GPS and BeiDou: A Case Study

Detection and Monitoring of Tunneling-Induced Riverbed Deformation Using GPS and BeiDou: A Case Study

Using the signal-to-noise ratio of GPS records to detect motion of structures

Global Navigation Satellite System‐based positioning technology for structural health monitoring: a review

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