NChina16: A stable geodetic reference frame for geological hazard studies in North China

Wang, Guoquan; Bao, Yan; Gan, Weijun; Geng, Jianghui; Xiao, Gengru; Shen, Shui‐Long

doi:10.1016/j.jog.2018.01.003

Cited by 21 publications

(14 citation statements)

References 56 publications

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“…The GIPSY-OASIS software package employs a single-receiver phase ambiguity-fixed PPP method for its static positioning. According to Wang et al [37], the GIPSY PPP daily solutions retain 2 to 4 mm horizontal RMS-accuracy (repeatability) and 7 to 9 mm vertical RMS-accuracy in North China. Since the baselines are extremely short (<2 km) for the riverbed monitoring project, we only use the L1 observations for DD processing.…”

Section: Gps Data Processingmentioning

confidence: 99%

“…A stable regional or local reference frame is needed to exclude the effects of the plate motions. In this study, we transform the IGS14 coordinates to the Stable North China Reference Frame 2016 (NChina16), which was established from over six years of observations from 15 continuous operating reference stations (CORS) fixed on the North China Craton [37]. The frame stability of NChina16 is within 1 mm/year.…”

Section: Monitoring the Stability Of The Base Stationmentioning

confidence: 99%

“…Sci. 2019, 9, x FOR PEER REVIEW 9 of 23 stations (CORS) fixed on the North China Craton [37]. The frame stability of NChina16 is within 1 mm/year.…”

Section: Monitoring the Stability Of The Base Stationmentioning

confidence: 99%

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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: Gps Data Processingmentioning

confidence: 99%

Section: Monitoring the Stability Of The Base Stationmentioning

confidence: 99%

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

et al. 2019

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“…Since GPS data as available in early 2020 is used for realizing the reference frame, the updated reference frame is designated as Houston20. The detailed methods for realizing a stable regional reference frame and the criteria for selecting reference stations are addressed in recent publications for establishing regional reference frames in North China (Wang et al, 2018), Houston (Kearns et al, 2019), and the Caribbean .…”

Section: Reference Stationsmentioning

confidence: 99%

GPS geodetic infrastructure for subsidence and fault monitoring in Houston, Texas, USA

Agudelo

Wang

et al. 2020

Proc. IAHS

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Houston, Texas, is one of the earliest urban areas to employ Global Positioning System (GPS) technology for land subsidence and fault monitoring. As of 2020, the University of Houston and the Harris-Galveston Subsidence District have integrated over 230 permanent GPS stations into their routine GPS data processing for regional subsidence and fault monitoring. This article summarizes the GPS geodetic infrastructure in the Greater Houston region. The infrastructure is comprised of two components: a dense GPS network (HoustonNet) and a stable regional reference frame (Houston20). Houston20 is realized by 25 long-history ( > 8 years) continuous GPS stations located outside the subsiding area and is aligned in origin and scale with the International GNSS Reference Frame 2014 (IGS14). The stability of the regional reference frame is below 1 mm yr −1 in all three directions. GPS-derived ground deformation rates (2010-2019) within the Greater Houston region are also presented in this article.

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“…However, there is no unified definition for "long-term". According to our experience for realizing stable reference frames within the Houston metropolitan area [41,42] and the North China region [29], a minimum of 3 years continuous observational time span is needed for assessing the linearity of the GPS-derived displacement time series. Linearity is a term that is often used to assess the quality of a potential reference station, which reflects how well the motions can be described by a constant velocity over a period of time.…”

Section: Selection Of Reference Stationsmentioning

confidence: 99%

CARIB18: A Stable Geodetic Reference Frame for Geological Hazard Monitoring in the Caribbean Region

et al. 2019

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We have developed a Stable Caribbean Reference Frame 2018 (CARIB18) using long-term continuous observations from 18 continuously operating Global Positioning System (GPS) stations fixed on the margins of the stable portion of the Caribbean plate. The frame stability of CARIB18 is approximately 0.7 mm/year in the horizontal direction and 0.9 mm/year in the vertical direction. A method that employs a total of seven parameters for transforming positional time series from a global reference frame (IGS14) to a regional reference frame is introduced. The major products from this study include the seven parameters for realizing CARIB18 coordinates and three-component site velocities of 250 continuous GPS stations (>3 years) with respect to CARIB18. Geological hazard monitoring using GPS has traditionally been performed using the carrier-phase differential method that requires single or multiple reference stations to be simultaneously operated in the field. CARIB18 allows for precise geological hazard monitoring using stand-alone GPS, which substantially reduces field costs and simplifies logistics for long-term geological hazard monitoring. Applications of CARIB18 in plate motion, post-seismic, and volcano monitoring and research are demonstrated in this article. The regional reference frame will be periodically updated every few years with more reference stations and longer periods of observations to mitigate the degradation of the frame over time and will be synchronized with the updates of the International GNSS Service (IGS) IGS reference frame.

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NChina16: A stable geodetic reference frame for geological hazard studies in North China

Cited by 21 publications

References 56 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

GPS geodetic infrastructure for subsidence and fault monitoring in Houston, Texas, USA

CARIB18: A Stable Geodetic Reference Frame for Geological Hazard Monitoring in the Caribbean Region

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