Wei Peng's research while affiliated with Changsha University of Science and Technology and other places

Publications (11)

Article
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We explored the driving factors of nonlinear signals in vertical coordinate sequences of stations in a Taiwan global navigation satellite system (GNSS) network, including atmospheric loading (ATML), hydrological loading (HYDL), and non-tidal ocean loading (NTOL) effects. At the same time, we used the finite element analysis software MIDAS to quanti...
Article
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A long-strip differential interferometric synthetic aperture radar (DInSAR) measurement based on multi-frame image mosaicking is currently the realizable approach to measure large-scale ground deformation. As the spatial range of the mosaicked images increases, the nonlinear variation of ground ocean tidal loading (OTL) displacements is more signif...
Article
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Multibaseline (MB) phase unwrapping (PU) is a key processing technique in MB interferometric synthetic aperture radar (InSAR). As one of the most popular methods, the cluster analysis (CA)-based MBPU method often suffers from the problem of low noise robustness. Therefore, the block-matching and 3D filtering (BM3D) algorithm, one of the most effect...
Article
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Deformation prediction for a salt solution mining area is essential to mining environmental protection. The combination of Synthetic Aperture Radar Interferometry (InSAR) technique with Probability Integral Method (PIM) has proven to be powerful in predicting mining-induced subsidence. However, traditional mathematical empirical models (such as lin...
Article
Long-term monitoring of highways in soft soil areas, especially during the postconstruction period, is of great significance to ensure transportation safety and the quality of highway construction. Multitemporal interferometric synthetic aperture radar (MTInSAR) provides an effective tool for soft clay highway monitoring. However, most time-series...
Article
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In recent years, multibaseline phase unwrapping (MBPU) has been widely studied, but it is still suffering from the problem of low noise robustness. In view of this, two cluster correction methods for the cluster-analysis (CA)-based MBPU algorithms are presented to improve the accuracy and effectiveness of the algorithm. In the first method, a suita...
Article
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Monitoring surface deformation for highways built on soft clay subgrades is fundamental for understanding the dynamics of the settlement process and preventing the occurrence of safety accidents. Most of the traditional Interferometric Synthetic Aperture Radar (InSAR) deformation models for highway monitoring are based on a combination of one or se...
Article
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The long-term spatial-temporal deformation monitoring of densely distributed infrastructures near the lake area is of great significance to understand the urban health status and prevent the potential traffic safety problems. In this paper, the permanent scatterer interferometry (PSI) technology with TerraSAR-X imagery over the area around Dongting...
Article
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Global Positioning System (GPS) kinematic precise point positioning (KPPP) is an effective approach for estimating the Earth’s tidal deformation. The accuracy of KPPP is usually evaluated by comparing results with tidal models. However, because of the uncertainties of the tidal models, the accuracy of KPPP-estimated tidal displacement is difficult...
Article
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The coastal crustal deformation caused by ocean tidal loading (OTL) varies spatially and temporally, and this spatiotemporal variation in satellite-based interferometric synthetic aperture radar (InSAR) measurements needs to be determined. In this paper, we propose a spatiotemporal modeling method to estimate the OTL displacements in InSAR measurem...
Article
Full-text available
Ocean tide loading (OTL) causes crustal displacements in coastal regions, and the relative variation of these ground displacements may reach several centimeters across differential interferometric synthetic aperture radar (DInSAR) interferograms. However, orbit errors seriously affect the analysis of long-wavelength crustal deformation signals such...

Citations

... Another way is to segment a large image into small blocks, which can significantly reduce the computation burden and complexity in one block and improve the efficiency of data processing. Currently, data partition strategies are applied in some steps of SAR data processing, such as phase unwrapping [17][18][19][20], orbital error correction [21], atmospheric correction [22,23], and PS point decomposition [24,25], but not the whole data process. GAMMA software provides a well-known patch-based point target analysis method, Interferometric Point Target Analysis (IPTA) [26]. ...
... Previous studies have shown that water injection for oil extraction can alleviate surface deformation of oilfield to a large extent (Yang et al., 2019;Zhang et al., 2019a), making the Gudong oilfield relatively stable. Moreover, as shown in Fig. 15 (A), precipitation and Typhoon Lekima (August 2019) can only affect water content of the shallow layer with small and high-frequency fluctuations on PC1 (Murray and Lohman, 2018;Xing et al., 2022). However, oil is usually extracted at a depth of 2 ~ 3 km in the YRD. ...
... Because of the interferograms, coherence seasonal characteristics are affected by kinds of external environmental factors such as precipitation and temperature, we performed interferogram seasonal filtering to optimize the network and select the DTs through a strict temporal coherence threshold (0.75) based on the conventional SBAS-InSAR (Rui et al., 2021;Xiang et al., 2021;Xiang et al., 2022). Whereafter, the time series deformation model based on the Poisson curve (PC) is applied to obtain high-precision time series deformation results of the DTs (Ming-hua et al., 2005;Zhu and Zhou, 2009;Yang et al., 2016;Jianjun et al., 2017;Zhu et al., 2021). ...
... Therefore, the requirements for early warning of natural disasters and emergency responses after disasters are more stringent. Synthetic aperture radar interferometry (InSAR) [1][2][3] is a powerful and well-established remote-sensing technique used to measure many important geophysical parameters, e.g., surface height of topography [4] or ground deformation [5][6][7][8], which plays an important role in early warning of natural disasters and emergency responses after disasters. Phase unwrapping (PU) is one of the key steps of InSAR [9]. ...
... Over the past two decades, thousands of GNSS continuous operation reference stations maintained by national and international organizations, such as the International GNSS Service, the Crustal Movement Observation Network of China, the Plate Boundary Observatory of the United States, and the GPS Earth Observation Network of Japan, have provided abundant observations for the estimation of OTL displacements. Many studies utilizing GPS with the PPP approach to explore the accuracy of OTL displacement estimation have been conducted at not only a regional scale, but also a global scale (Ito et al. 2009;Yuan et al. 2013;Penna et al. 2015;Wei et al. 2019). For example, Yuan et al. (2013) reported a sub-millimeter accuracy for the GPS estimation of OTL displacements for M2, N2, O1 and Q1 tidal constituents. ...
... The global OTL displacements are usually calculated using an ocean tidal model-based loading Green's function method. Taking the FES2014b model as an example, the up (U), north (N) and east (E) OTL displacements d OTL n,p of point p with an interval of 300 s in the year 2019 can be obtained by using the ocean tidal model-based loading Green function method, and the variation of the OTL displacements in three-dimension is evaluated by the standard deviation (StdDev) S OTL p , which can be expressed as [12]: ...
... Then, the crustal deformations caused by the OTL in DInSAR interferograms are analyzed. Finally, the OT model is applied to correct the OTL effect in the DInSAR interferograms [292]. Many studies have investigated the applications of the DInSAR technique for OTL analysis. ...