Radar Interferometry: 20 Years of Development in Time Series Techniques and Future Perspectives

Minh, Dinh Ho Tong; Hanssen, Ramon F.; Rocca, F.

doi:10.3390/rs12091364

Cited by 76 publications

(43 citation statements)

References 88 publications

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“…Such stable targets are named Permanent/persistent Scatter (PS) which is a dominant scatterer within resolution elements [4,5,23]. In practice, the relative ε z and v for every PS pair are jointly estimated by maximizing a complex ensemble coherence in time [7]. We are then able to calculate ε z and v over the whole network by integrating their relative values from pairs of neighboring pixels for a reference pixel.…”

Section: Methodsmentioning

confidence: 99%

“…Hence, the enhanced DS targets can be combined with PS using the same PS algorithm. For more details on the technique, the reader can be found in [7]. The PSDS, nowadays, is a replacement of PS technique due to its stable performance particularly in nonurban areas [6].…”

Section: The Psds Techniquementioning

confidence: 99%

“…Since the 2000's, time series SAR interferometry (InSAR) has been exploited to map large scale surface subsidence with high accuracy from space [4,5]. Particularly, the recently advanced technique PSDS (permanent scatterers and distributed scatterers) becomes the main InSAR tool for many deformation applications due to its superior performance [6,7]. The radar interferometric measurement can only detect millimetric motion in the direction linking between the SAR's sensor and the sensed area (so-called light of sight -LOS) [8].…”

Section: Introductionmentioning

confidence: 99%

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Quantifying Horizontal and Vertical Movements in Ho Chi Minh City by Sentinel-1 Radar Interferometry

Minh¹,

Ngo²,

Lê³

et al. 2020

Preprint

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Ho Chi Minh City (HCMC), the most populous city and the economic center of Viet Nam, has faced ground subsidence in recent decades. This work aims at providing an unprecedented spatial extent coverage of the subsidence in HCMC in both horizontal and vertical components using Interferometric Synthetic Aperture Radar (InSAR) time series. For this purpose, an advanced InSAR technique PSDS (Permanent Scatterers and Distributed Scatterers) was applied to two big European Space Agency (ESA) Sentinel-1 datasets composed of 96 ascending and 202 descending images, acquired from 2014 to 2020 over HCMC area. A time series of 33 Cosmos SkyMED images was also used for comparison purpose. The combination of ascending and descending satellite passes allows the decomposition of the light of sight velocities into horizontal East-west and vertical components. By taking into account the presence of the horizontal East-west movement, our finding indicates that the precision of the decomposed vertical velocity can be improved up to 3 mm/year for Sentinel-1 data. The obtained results revealed that subsidence is most severe in areas along the Sai Gon river in the northwest-southeast axis and the southwest of the city with the maximum value up to 80 mm/year, consistent with findings in the literature. The magnitude of horizontal East-West velocities is relatively small and a large-scale westward motion can be observed in the northwest of the city at a rate of 2-5 mm/year. Together, these results reinforced the remarkable suitability of ESA's Sentinel-1 SAR for subsidence applications even for non-Europe countries such as Vietnam and Southeast Asia.

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Section: Methodsmentioning

confidence: 99%

Section: The Psds Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quantifying Horizontal and Vertical Movements in Ho Chi Minh City by Sentinel-1 Radar Interferometry

Minh¹,

Ngo²,

Lê³

et al. 2020

Preprint

Self Cite

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“…As a last resort, surface reflectors may be installed, but this eliminates some of the inherent advantages of InSAR monitoring (Ferretti 2014). An up-to-date overview of radar interferometry by Ming et al (2020) covers the many approaches that we do not have the space to include in this short discussion.…”

Section: Interferometric Synthetic Aperture Radarmentioning

confidence: 99%

Using geodetic data in geothermal areas

et al. 2020

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Geodetic observations, often in conjunction with other data, provide a cost-effective means for identifying and characterizing geothermal resources. A review of the various methods reveals how the technology for measuring deformation has advanced considerably in the past few decades. Currently, interferometric synthetic aperture radar is the method of choice for monitoring deformation at a geothermal field. A discussion of geodetic monitoring at The Geysers geothermal field, California, illustrates some of the progress made and the challenges that remain.

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“…For the SBAS algorithm [25], the temporal coherence factor was initially introduced in [57] to expressively quantify the effects of such temporal inconsistencies; hence, the temporal coherence factor represents a quality index of the ground displacement time-series reconstruction. Over the years, the temporal coherence was extensively used in several SBAS investigations, see for instance [76][77][78][79], to identify the reliable pixels after SBAS inversion. The temporal coherence factor was mathematically defined as:…”

mentioning

confidence: 99%

Multi-Temporal Small Baseline Interferometric SAR Algorithms: Error Budget and Theoretical Performance

Pepe

2021

Remote Sensing

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Multi-temporal interferometric synthetic aperture radar (MT-InSAR) techniques are well recognized as useful tools for detecting and monitoring Earth’s surface temporal changes. In this work, the fundamentals of error noise propagation and perturbation theories are applied to derive the ground displacement products’ theoretical error bounds of the small baseline (SB) differential interferometric synthetic aperture radar algorithms. A general formulation of the least-squares (LS) optimization problem, representing the SB methods implementation’s core, was adopted in this research study. A particular emphasis was placed on the effects of time-uncorrelated phase unwrapping mistakes and time-inconsistent phase disturbances in sets of SB interferograms, leading to artefacts in the attainable InSAR products. Moreover, this study created the theoretical basis for further developments aimed at quantifying the error budget of the time-uncorrelated phase unwrapping mistakes and studying time-inconsistent phase artefacts for the generation of InSAR data products. Some experiments, performed by considering a sequence of synthetic aperture radar (SAR) images collected by the ASAR sensor onboard the ENVISAT satellite, supported the developed theoretical framework.

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Radar Interferometry: 20 Years of Development in Time Series Techniques and Future Perspectives

Cited by 76 publications

References 88 publications

Quantifying Horizontal and Vertical Movements in Ho Chi Minh City by Sentinel-1 Radar Interferometry

Quantifying Horizontal and Vertical Movements in Ho Chi Minh City by Sentinel-1 Radar Interferometry

Using geodetic data in geothermal areas

Multi-Temporal Small Baseline Interferometric SAR Algorithms: Error Budget and Theoretical Performance

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