Measuring surface subsidence in Taipei, Taiwan with Sentinel-1 data using PS-InSAR

Yun-Chiao Chang; Kuo-Hsin Tseng

doi:10.1117/12.3045967

3 January 2025 Measuring surface subsidence in Taipei, Taiwan with Sentinel-1 data using PS-InSAR

Yun-Chiao Chang, Kuo-Hsin Tseng

Author Affiliations +

Proceedings Volume 13263, Land Surface and Cryosphere Remote Sensing V; 1326308 (2025) https://doi.org/10.1117/12.3045967
Event: Asia-Pacific Remote Sensing, 2024, Kaohsiung, Taiwan

Abstract

In recent years, advancements in Synthetic Aperture Radar Interferometry (InSAR) technology have accelerated progress in geology and engineering. Particularly in urban areas, using Persistent Scatterer Interferometric Synthetic Aperture Radar (PSInSAR) technology allows for acquiring long-term stable phase information to measure ground deformation down to cm level accuracy. Our research aims to implement PSInSAR technology in Taipei, which has experienced rapid development over the past few decades. However, due to the cutoff of the Keelung River in the 1990s, issues such as ground subsidence and building safety have become focal points of concern. Cracks and foundation subsidence around construction sites further highlight the necessity of monitoring this area. We utilize Sentinel-1 satellite imagery from the European Space Agency to track deformations in 2019-2023 using PSInSAR technology, and we also implement corner reflectors to verify its accuracy. Preliminary results indicate that some patches in our study area exhibit distinct and ongoing subsidence. The maximum subsidence rate is 9 mm per year.

(2025) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yun-Chiao Chang and Kuo-Hsin Tseng "Measuring surface subsidence in Taipei, Taiwan with Sentinel-1 data using PS-InSAR", Proc. SPIE 13263, Land Surface and Cryosphere Remote Sensing V, 1326308 (3 January 2025); https://doi.org/10.1117/12.3045967

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