Improved SAR Image Coregistration Using Pixel-Offset Series

Wang, Teng; Jónsson, Sigurjón; Hanssen, Ramon F.

doi:10.1109/lgrs.2013.2295429

Cited by 26 publications

(7 citation statements)

References 25 publications

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“…Because of the large-magnitude deformation caused by the two main events, the near-field fringes in the InSAR interferograms are too dense to unwrap reliably. Therefore, we rely on pixel-offset tracking to measure the coseismic surface deformation caused by these two events (Wang et al, 2014(Wang et al, , 2018. The crosscorrelation of the Sentinel-1 SAR amplitude images is shown in Figure 3.…”

Section: Sentinel-1 Data Processingmentioning

confidence: 99%

Slip distribution of the February 6, 2023 Mw 7.8 and Mw 7.6, Kahramanmaraş, Turkey earthquake sequence in the East Anatolian Fault Zone

et al. 2023

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On February 6, 2023, two large earthquakes occurred near the Turkish town of Kahramanmaraş. The moment magnitude (Mw) 7.8 mainshock ruptured a 310 km-long segment of the left-lateral East Anatolian Fault, propagating through multiple releasing step-overs. The Mw 7.6 aftershock involved nearby left-lateral strike-slip faults of the East Anatolian Fault Zone, causing a 150 km-long rupture. We use remote-sensing observations to constrain the spatial distribution of coseismic slip for these two events and the February 20 Mw 6.4 aftershock near Antakya. Pixel tracking of optical and synthetic aperture radar data of the Sentinel-2 and Sentinel-1 satellites, respectively, provide near-field surface displacements. High-rate Global Navigation Satellite System data constrain each event separately. Coseismic slip extends from the surface to about 15 km depth with a shallow slip deficit. Most aftershocks cluster at major fault bends, surround the regions of high coseismic slip, or extend outward of the ruptured faults. For the mainshock, rupture propagation stopped southward at the diffuse termination of the East Anatolian fault and tapered off northward into the Pütürge segment, some 20 km south of the 2020 Mw 6.8 Elaziğ earthquake, highlighting a potential seismic gap. These events underscore the high seismic potential of immature fault systems.

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Section: Sentinel-1 Data Processingmentioning

confidence: 99%

Slip distribution of the February 6, 2023 Mw 7.8 and Mw 7.6, Kahramanmaraş, Turkey earthquake sequence in the East Anatolian Fault Zone

et al. 2023

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“…To detect interference existing in the data, a threshold .,\ is set on Pk. If we denote the outlier samples and the rest of sample set Zout and Zin, respectively, then the data samples with and without interference are sorted out by (3) The processing scheme to suppress the detected interference is shown in Fig. 1.…”

Section: Ongipmentioning

confidence: 99%

“…In [2], a SAR image co-registration procedure, based on the use of external measures is discussed. In [3], a new strategy that uses a sample offset series of detected subimage patches dominated by point-like scatterers to improve image coregistration is proposed. For practical radar systems, special coregistration procedures are designed for them.…”

Section: Introductionmentioning

confidence: 99%

Image extra-coregistration based on GIP for radar applications

Pernstal²,

Sjogren

et al. 2022

2022 RIVF International Conference on Computing and Communication Technologies (RIVF)

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Image coregistration is a mandatory procedure for radar applications such as synthetic aperture radar change detection. The spatial coregistration can be easily handled with geo-reference, whereas radiometric coregistration requires much more effort due to the randomness of noise and clutter. The per formance of a coregistration method is usually measured by the correlation coefficient that is desire to be close to unity. However, the currently used methods cannot provide coregistration with such correlation coefficient value. The paper introduces an image extra-coregistration method that helps to increase the correlation coefficient between the radar images close to unity. This strongly supports radar applications such as change detection.

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“…This component should be removed by using the DEM-assisted co-registration [28,29]. DEM and orbit ephemerides are used in conjunction to calculate the topographic offsets.…”

Section: Split-bandwidth Interferometrymentioning

confidence: 99%

“…Thus, three dimensional phase unwrapping [32] can be carried out directly to retrieve the time series displacements. by using the DEM-assisted co-registration [28,29]. DEM and orbit ephemerides are used in conjunction to calculate the topographic offsets.…”

Section: Split-bandwidth Interferometrymentioning

confidence: 99%

Landslide Displacement Monitoring with Split-Bandwidth Interferometry: A Case Study of the Shuping Landslide in the Three Gorges Area

et al. 2017

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Landslides constitute a major threat to people's lives and property in mountainous regions such, as in the Three Gorges area in China. Synthetic Aperture Radar Interferometry (InSAR) with its wide coverage and unprecedented displacement measuring capabilities has been widely used in landslide monitoring. However, it is difficult to apply traditional InSAR techniques to investigate landslides having large deformation gradients or moving primarily in north-south direction. In this study, we propose a time series split-bandwidth interferometry (SBI) procedure to measure two dimensional (azimuth and range) displacements of the Shuping landslide in the Three Gorges area with 36 TerraSAR-X high resolution spotlight (HS) images acquired from February 2009 to April 2010. Since the phase based SBI procedure is sensitive to noise, we focused on extracting displacements of corner reflectors (CRs) installed on or surrounding the Shuping landslide. Our results agreed well with measurements obtained by the point-like targets offset tracking (PTOT) technique and in-situ GPS stations. Centimeter level accuracy could be achieved with SBI on CRs which shows great potential in futures studies on fast moving geohazards.

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Improved SAR Image Coregistration Using Pixel-Offset Series

Cited by 26 publications

References 25 publications

Slip distribution of the February 6, 2023 Mw 7.8 and Mw 7.6, Kahramanmaraş, Turkey earthquake sequence in the East Anatolian Fault Zone

Slip distribution of the February 6, 2023 Mw 7.8 and Mw 7.6, Kahramanmaraş, Turkey earthquake sequence in the East Anatolian Fault Zone

Image extra-coregistration based on GIP for radar applications

Landslide Displacement Monitoring with Split-Bandwidth Interferometry: A Case Study of the Shuping Landslide in the Three Gorges Area

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