Resolving three-dimensional surface displacements from InSAR measurements: A review

Hu, Jun; Li, Z. W.; Ding, Xiaoli; Zhu, Jianjun; Zhang, Lei; Sun, Qiliang

doi:10.1016/j.earscirev.2014.02.005

Cited by 355 publications

(211 citation statements)

References 110 publications

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“…Due to the side-looking imaging geometry of the current SAR sensors, the deformation in the LOS d LOS direction is actually the projection of the 3-D surface displacements in the vertical W, east U E , and north U N directions, according to the following equation [26,45]:…”

Section: Overview Of the Sip Methodsmentioning

confidence: 99%

“…The dominant error source in the azimuth direction is mainly due to the following; mining-induced surface deformation is dominated by vertical subsidence, and the components in the east and north directions are generally much smaller than the vertical component, particularly in the central portion of a mining-induced deformation basin [32,44]. Given that the LOS deformation is also dominated by vertical subsidence [26], mining-related LOS deformation is usually much larger than the azimuth deformation. This causes a much higher possibility of the error offsets masking the azimuth deformation than in the LOS deformation, for SAR data with a nearly equal range and azimuth resolution.…”

Section: Introductionmentioning

confidence: 99%

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Retrieving 3-D Large Displacements of Mining Areas from a Single Amplitude Pair of SAR Using Offset Tracking

et al. 2017

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Due to the side-looking imaging geometry of the current synthetic aperture radar (SAR) sensors, only ground deformation along the radar's line-of-sight (LOS) and azimuth directions can be potentially obtained from a single amplitude pair (SAP) of SAR using offset tracking (OT) procedures. This significantly hinders the accurate assessment of mining-related hazards and better understanding of the mining subsidence mechanism. In this paper, we propose a method for completely retrieving three-dimensional (3-D) mining-induced displacements with OT-derived observations of LOS deformation from a single amplitude pair of SAR (referred to as OT-SAP hereinafter). The OT-SAP method first constructs two extra constraints at each pixel of the mining area based on the proportional relationship between the horizontal motion of the mining area and the gradients of the vertical subsidence in the east and north directions. The full 3-D mining-induced displacements are then solved by coupling the two constructed extra constraints with the OT-derived observations of the LOS deformation. The Daliuta coal mining area in China was selected to test the proposed OT-SAP method. The results show that the maximum 3-D displacements of this mining area were about 4.3 m, 1.1 m, and 1.3 m in the vertical, east, and north directions, respectively, from 21 November 2012 to 6 February 2013. The accuracies of the retrieved displacements in the vertical and horizontal directions are about 0.201 m and 0.214 m, respectively, which are much smaller than the mining-induced displacements in this mining area and can satisfy the basic requirements of mining deformation monitoring.

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Section: Overview Of the Sip Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Retrieving 3-D Large Displacements of Mining Areas from a Single Amplitude Pair of SAR Using Offset Tracking

et al. 2017

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“…Generally, these methods can be divided into four categories. (i) Integrating of InSAR and Offset-Tracking: Raucoules et al [47] obtained time-variable 3-D ground displacements fields in the La Valette landslide by combining the ascending and descending Offset-Tracking [48][49][50] and InSAR measurements. The temporal discrepancy between the different acquired times of SAR images from ascending and descending tracks is ignored by interpolating the displacement rates according to the images acquired epochs.…”

Section: Introductionmentioning

confidence: 99%

“…Vollrath et al [56] decomposed InSAR time-series deformation into 3-D with the assistance of GPS data in the case of low strain rates with the SISTEM. Obviously, this method is dependent on the number and distribution of the GPS sites, which are always limited by the high deployment and operational cost [50]. (iv) Neglecting of N-S (North-South) deformation: Ozawa and Ueda [57] estimated U-D (Up-Down) and E-W (East-West) time-series deformations in Miyake-jima by neglecting the contribution of N-S displacements on InSAR LOS measurements [58], and employed a smooth constraint of temporal displacement change to settle the problem of temporal discrepancy.…”

Section: Introductionmentioning

confidence: 99%

Deriving 3-D Time-Series Ground Deformations Induced by Underground Fluid Flows with InSAR: Case Study of Sebei Gas Fields, China

Liu

Sun

et al. 2017

Remote Sensing

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Multi-temporal Interferometric Synthetic Aperture Radar (MT-InSAR) technique has proven to be a powerful tool for the monitoring of time-series ground deformations along the line-of-sight (LOS) direction. However, the one-dimensional (1-D) measurements cannot provide comprehensive information for interpreting the related geo-hazards. Recently, a novel method has been proposed to map the three-dimensional (3-D) deformation associated with underground fluid flows based on single-track InSAR LOS measurements and the deformation modeling associated with the Green's function. In this study, the method is extended in temporal domain by exploiting the MT-InSAR measurements, and applied for the first time to investigate the 3-D time series deformation over Sebei gas field in Qinghai, Northwest China with 37 Sentinel-1 images acquired during October 2014-July 2017. The estimated 3-D time series deformations provide a more complete view of ongoing deformation processes as compared to the 1-D time series deformations or the 3-D deformation velocities, which is of great importance for assessing the possible geohazards. In addition, the extended method allows for the retrieval of time series of fluid volume changes due to the gas extraction in the Sebei field, which agrees well with those from the PetroChina Qinghai Oilfield Company Yearbooks (PQOCYs). This provides a new way to study the variations of subsurface fluids at unprecedented resolution.

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“…The unit projection vector of LOS deformation for ascending and descending orbits are S asc " rs e , s n , s u s T " r´0.607,´0.170, 0.755s T and S des " rs e , s n , s u s T " r0.608,´0.168, 0.776s T , respectively. By assuming the north-south deformation is null and exploiting the projection vectors S asc and S des to establish observation equation, two dimensional (2D) deformations, i.e., east-west and up=down (or vertical) are derived by combing the D-InSAR and Offset Tracking measurements from ascending and descending orbits [35]. We acknowledge that neglecting the north-south deformation will induce errors in the east-west and vertical deformation estimation, but for the Illapel earthquake it might be very slim, because the azimuth deformation itself is very small.…”

Section: Precision Assessment and 2-d Displacement Retrievalmentioning

confidence: 99%

Continent-Wide 2-D Co-Seismic Deformation of the 2015 Mw 8.3 Illapel, Chile Earthquake Derived from Sentinel-1A Data: Correction of Azimuth Co-Registration Error

Feng

Zhang

et al. 2016

Remote Sensing

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Abstract:In this study, we mapped the co-seismic deformation of the 2015 Mw 8.3 Illapel, Chile earthquake with multiple Sentinel-1A TOPS data frames from both ascending and descending geometries. To meet the requirement of very high co-registration precision, an improved spectral diversity method was proposed to correct the co-registration slope error in the azimuth direction induced by multiple Sentinel-1A TOPS data frames. All phase jumps that appear in the conventional processing method have been corrected after applying the proposed method. The 2D deformation fields in the east-west and vertical directions are also resolved by combing D-InSAR and Offset Tracking measurements. The results reveal that the east-west component dominated the 2D displacement, where up to 2 m displacement towards the west was measured in the coastal area. Vertical deformations ranging between´0.25 and 0.25 m were found. The 2D displacements imply the collision of the Nazca plate squeezed the coast, which shows good accordance with the geological background of the region.

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Resolving three-dimensional surface displacements from InSAR measurements: A review

Cited by 355 publications

References 110 publications

Retrieving 3-D Large Displacements of Mining Areas from a Single Amplitude Pair of SAR Using Offset Tracking

Retrieving 3-D Large Displacements of Mining Areas from a Single Amplitude Pair of SAR Using Offset Tracking

Deriving 3-D Time-Series Ground Deformations Induced by Underground Fluid Flows with InSAR: Case Study of Sebei Gas Fields, China

Continent-Wide 2-D Co-Seismic Deformation of the 2015 Mw 8.3 Illapel, Chile Earthquake Derived from Sentinel-1A Data: Correction of Azimuth Co-Registration Error

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