A Phase-based InSAR Tropospheric Correction Method for Interseismic Deformation Based on Short-period Interferograms

Shuai Wang; Zhong Lu; Bin Wang; Yufen Niu; Chuang Song; Xing Li; Zhang Feng Ma; Caijun Xu

doi:10.1109/tgrs.2023.3296958

A Phase-based InSAR Tropospheric Correction Method for Interseismic Deformation Based on Short-period Interferograms

Shuai Wang, Zhong Lu, Bin Wang, Yufen Niu, Chuang Song, Xing Li, Zhang Feng Ma, Caijun Xu

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The new generation of SAR satellites is serving our long-standing demand for high-resolution crustal deformation over various scales. However, the reliability of InSAR measurements is still limited by varying tropospheric conditions between acquisitions, especially when mapping slow-deforming interseismic deformation. We propose here a new phase-based approach for mapping interseismic deformation using short-period interferograms. Our method formulates the InSAR phase after topographic correction as the sum of three components: (1) spatiotemporally varied turbulent tropospheric phase, (2) topography-correlated stratified tropospheric phase, and (3) interseismic-related deformation assumed to be accumulated at a constant rate. We simultaneously solve for the parameters in the model to avoid overestimating the tropospheric phases, especially when interseismic deformation and tropospheric delays are both coupled with elevation in space. Synthetic tests and practical applications to easternmost Altyn Tagh fault demonstrate that the new method can effectively recover the small-amplitude interseismic deformation caused by fault motion even when the interferograms are dominated by strong tropospheric delays.

Original language	English (US)
Pages (from-to)	1-1
Number of pages	1
Journal	IEEE Transactions on Geoscience and Remote Sensing
DOIs	https://doi.org/10.1109/tgrs.2023.3296958
State	Published - Jul 19 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-07-24
Acknowledgements: This work was supported by the National Natural Science Foundation of China under Grants 42204001 and 42004002, and also by the Natural Science Foundation of Jiangsu Province under Grant BK20200712. We would like to thank two anonymous reviewers for their valuable comments. We thank Wei Xiong for providing us the continuous GNSS data and Kang Wang for providing us the code for common-scene-stacking. Horizontal GNSS displacements are available through [46]. We recognize the European Centre for medium range weather forecasts for providing the ERA5 products.

ASJC Scopus subject areas

Electrical and Electronic Engineering
General Earth and Planetary Sciences

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10.1109/tgrs.2023.3296958

https://repository.kaust.edu.sa/bitstream/10754/693172/1/A_Phase-based_InSAR_Tropospheric_Correction_Method_for_Interseismic_Deformation_Based_on_Short-period_Interferograms.pdf

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title = "A Phase-based InSAR Tropospheric Correction Method for Interseismic Deformation Based on Short-period Interferograms",

abstract = "The new generation of SAR satellites is serving our long-standing demand for high-resolution crustal deformation over various scales. However, the reliability of InSAR measurements is still limited by varying tropospheric conditions between acquisitions, especially when mapping slow-deforming interseismic deformation. We propose here a new phase-based approach for mapping interseismic deformation using short-period interferograms. Our method formulates the InSAR phase after topographic correction as the sum of three components: (1) spatiotemporally varied turbulent tropospheric phase, (2) topography-correlated stratified tropospheric phase, and (3) interseismic-related deformation assumed to be accumulated at a constant rate. We simultaneously solve for the parameters in the model to avoid overestimating the tropospheric phases, especially when interseismic deformation and tropospheric delays are both coupled with elevation in space. Synthetic tests and practical applications to easternmost Altyn Tagh fault demonstrate that the new method can effectively recover the small-amplitude interseismic deformation caused by fault motion even when the interferograms are dominated by strong tropospheric delays.",

author = "Shuai Wang and Zhong Lu and Bin Wang and Yufen Niu and Chuang Song and Xing Li and Ma, {Zhang Feng} and Caijun Xu",

note = "KAUST Repository Item: Exported on 2023-07-24 Acknowledgements: This work was supported by the National Natural Science Foundation of China under Grants 42204001 and 42004002, and also by the Natural Science Foundation of Jiangsu Province under Grant BK20200712. We would like to thank two anonymous reviewers for their valuable comments. We thank Wei Xiong for providing us the continuous GNSS data and Kang Wang for providing us the code for common-scene-stacking. Horizontal GNSS displacements are available through [46]. We recognize the European Centre for medium range weather forecasts for providing the ERA5 products.",

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AU - Song, Chuang

AU - Li, Xing

AU - Ma, Zhang Feng

AU - Xu, Caijun

N1 - KAUST Repository Item: Exported on 2023-07-24 Acknowledgements: This work was supported by the National Natural Science Foundation of China under Grants 42204001 and 42004002, and also by the Natural Science Foundation of Jiangsu Province under Grant BK20200712. We would like to thank two anonymous reviewers for their valuable comments. We thank Wei Xiong for providing us the continuous GNSS data and Kang Wang for providing us the code for common-scene-stacking. Horizontal GNSS displacements are available through [46]. We recognize the European Centre for medium range weather forecasts for providing the ERA5 products.

PY - 2023/7/19

Y1 - 2023/7/19

N2 - The new generation of SAR satellites is serving our long-standing demand for high-resolution crustal deformation over various scales. However, the reliability of InSAR measurements is still limited by varying tropospheric conditions between acquisitions, especially when mapping slow-deforming interseismic deformation. We propose here a new phase-based approach for mapping interseismic deformation using short-period interferograms. Our method formulates the InSAR phase after topographic correction as the sum of three components: (1) spatiotemporally varied turbulent tropospheric phase, (2) topography-correlated stratified tropospheric phase, and (3) interseismic-related deformation assumed to be accumulated at a constant rate. We simultaneously solve for the parameters in the model to avoid overestimating the tropospheric phases, especially when interseismic deformation and tropospheric delays are both coupled with elevation in space. Synthetic tests and practical applications to easternmost Altyn Tagh fault demonstrate that the new method can effectively recover the small-amplitude interseismic deformation caused by fault motion even when the interferograms are dominated by strong tropospheric delays.

AB - The new generation of SAR satellites is serving our long-standing demand for high-resolution crustal deformation over various scales. However, the reliability of InSAR measurements is still limited by varying tropospheric conditions between acquisitions, especially when mapping slow-deforming interseismic deformation. We propose here a new phase-based approach for mapping interseismic deformation using short-period interferograms. Our method formulates the InSAR phase after topographic correction as the sum of three components: (1) spatiotemporally varied turbulent tropospheric phase, (2) topography-correlated stratified tropospheric phase, and (3) interseismic-related deformation assumed to be accumulated at a constant rate. We simultaneously solve for the parameters in the model to avoid overestimating the tropospheric phases, especially when interseismic deformation and tropospheric delays are both coupled with elevation in space. Synthetic tests and practical applications to easternmost Altyn Tagh fault demonstrate that the new method can effectively recover the small-amplitude interseismic deformation caused by fault motion even when the interferograms are dominated by strong tropospheric delays.

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ER -

A Phase-based InSAR Tropospheric Correction Method for Interseismic Deformation Based on Short-period Interferograms

Abstract

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