Introduction to the GNSS geodetic infrastructure in the Gulf of Mexico Region

Yu, Jiangbo; Wang, G.

doi:10.1080/00396265.2015.1108069

Cited by 20 publications

(13 citation statements)

References 35 publications

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“…The useful lifetime of a regional reference frame depends on its stability. According to our previous investigations, the root-mean-square (RMS) accuracy of the PPP daily solutions is about 3 to 4 mm in the horizontal directions and 6 to 8 mm in the vertical direction within the Greater Houston region (e.g., Yu and Wang, 2017;Wang et al, 2017). For Houston20, the frame range is approximately 10 years from 2010 to 2019.…”

Section: Stability Of Houston20mentioning

confidence: 94%

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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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Section: Stability Of Houston20mentioning

confidence: 94%

“…3a). The reduction of the overall subsidence rates within the Greater Houston Region is attributed to the reduction of groundwater withdrawals due to HGSD and FBSD regulations (e.g., Yu et al, 2014;Shah et al, 2018). The subsidence time series illustrated in Fig.…”

Section: Subsidence Derived From Gps Observations (2010-2019)mentioning

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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“…The accuracy of GNSS-derived long-term site velocities does not solely rely on equipment (antennas and receivers), but largely depends on the available regional geodetic infrastructure, which can be defined by two fundamental components: a dense continuous long-history GPS network and a stable regional reference frame [11]. The former is referred to as the hardware component, and the latter is referred to as the firmware component of a regional geodetic infrastructure.…”

Section: Reference Stationsmentioning

confidence: 99%

GOM20: A Stable Geodetic Reference Frame for Subsidence, Faulting, and Sea-Level Rise Studies along the Coast of the Gulf of Mexico

et al. 2020

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We have established a stable regional geodetic reference frame using long-history (13.5 years on average) observations from 55 continuously operated Global Navigation Satellite System (GNSS) stations adjacent to the Gulf of Mexico (GOM). The regional reference frame, designated as GOM20, is aligned in origin and scale with the International GNSS Reference Frame 2014 (IGS14). The primary product from this study is the seven-parameters for transforming the Earth-Centered-Earth-Fixed (ECEF) Cartesian coordinates from IGS14 to GOM20. The frame stability of GOM20 is approximately 0.3 mm/year in the horizontal directions and 0.5 mm/year in the vertical direction. The regional reference frame can be confidently used for the time window from the 1990s to 2030 without causing positional errors larger than the accuracy of 24-h static GNSS measurements. Applications of GOM20 in delineating rapid urban subsidence, coastal subsidence and faulting, and sea-level rise are demonstrated in this article. According to this study, subsidence faster than 2 cm/year is ongoing in several major cities in central Mexico, with the most rapid subsidence reaching to 27 cm/year in Mexico City; a large portion of the Texas and Louisiana coasts are subsiding at 3 to 6.5 mm/year; the average sea-level-rise rate (with respect to GOM20) along the Gulf coast is 2.6 mm/year with a 95% confidence interval of ±1 mm/year during the past five decades. GOM20 provides a consistent platform to integrate ground deformational observations from different remote sensing techniques (e.g., GPS, InSAR, LiDAR, UAV-Photogrammetry) and ground surveys (e.g., tide gauge, leveling surveying) into a unified geodetic reference frame and enables multidisciplinary and cross-disciplinary research.

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“…The subsidence rate in the center could be more significant. Indeed, a subsidence rate of 15 cm yr −1 in Wuqing was reported by Zhang et al (2016) based on Interferometric Synthetic Aperture Radar (InSAR) observations during the period from 2012 to 2014. Other researchers also reported much faster subsidence in Tianjin during the 2000s and 2010s (Ye et al, 2016;Liu et al, 2016;Gong et al, 2018).…”

Section: Subsidence Ratesmentioning

confidence: 99%

Rapid Land Subsidence in Tianjin, China Derived from Continuous GPS Observations (2010–2019)

Zhao

Wang

et al. 2020

Proc. IAHS

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We have delineated ten years of urban subsidence derived from continuous GPS stations operated by the Crustal Movement Observational Network of China (CMONOC) within and adjacent to the municipality of Tianjin. A method for obtaining accurate site velocities with respect to a stable regional reference frame is described. CMONOC stations in Jizhou (JIXN) and Baodi (TJBD) districts recorded minor subsidence of approximately 1 to 2 mm yr −1 during the period from 2010 to 2019. One station in Wuqing (TJWQ) district and one station in Binhai (TJBH) district recorded steady subsidence of approximately 5 and 2 cm yr −1 from 2010 to 2019, respectively. One station in Cangzhou (HECX) of Hebei Province, adjacent to Tianjin, recorded steady subsidence of approximately 2.4 cm yr −1 during 2010-2014 and more rapid subsidence of 4 cm yr −1 since 2015. TJWQ recorded the most rapid land subsidence and the most significant seasonal ground oscillations (uplift and subsidence) among these five stations. This study indicates that subsidence rates in Tianjin vary significantly in space and time. Particular attention should be paid, therefore, to extrapolate or infer a rate of subsidence for an area on the basis of a subsidence rate obtained from previous GPS observations or proximal GPS sites. The subsidence time series presented in this study provide reliable "ground truth" and constraints for calibrating or validating subsidence estimations from numerical modeling and repeated surveys using other remote sensing techniques, such as Interferometric Synthetic Aperture Radar (InSAR).

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Introduction to the GNSS geodetic infrastructure in the Gulf of Mexico Region

Cited by 20 publications

References 35 publications

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

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

GOM20: A Stable Geodetic Reference Frame for Subsidence, Faulting, and Sea-Level Rise Studies along the Coast of the Gulf of Mexico

Rapid Land Subsidence in Tianjin, China Derived from Continuous GPS Observations (2010–2019)

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