An effective method for precisely observing large-scale land surface displacements with KOMPSAT-5 SAR satellite imagery: coarse-to-fine SAR offset tracking methods

S.-H. Chae; S.-J. Lee; K.-J. Lee

doi:10.1117/12.3029755

18 November 2024 An effective method for precisely observing large-scale land surface displacements with KOMPSAT-5 SAR satellite imagery: coarse-to-fine SAR offset tracking methods

S.-H. Chae, S.-J. Lee, K.-J. Lee

Author Affiliations +

Proceedings Volume 13195, Microwave Remote Sensing: Data Processing and Applications III; 131950L (2024) https://doi.org/10.1117/12.3029755
Event: Remote Sensing, 2024, Edinburgh, United Kingdom

Abstract

The synthetic aperture radar (SAR) offset tracking method is extensively employed to accurately measure significant surface displacements resulting from phenomena such as glacier melting, volcanic eruptions, and earthquakes, particularly when the interferometric phase lacks coherence. However, a trade-off exists between the resolution and accuracy of SAR offset tracking, determined by the selected kernel sizes. Hence, choosing optimal kernel sizes is crucial in the application of this method. In this study, we applied SAR offset tracking with a coarse-to-fine strategy, applying the kernel sizes coarsely and then fine. This approach allows for improved observational precision while maintaining resolution compared to general single-kernel offset tracking results. Applying this technique to SAR imagery from KOMPSAT-5, a South Korean X-band SAR satellite, enabled the precise observation of surface displacements caused by the melting of the Campbell Glacier in the East Antarctic and the 2023 Turkey-Syria earthquake. This marks the first instance of large-scale surface displacement observations using KOMPSAT-5 SAR imagery, affirming the effectiveness of the SAR offset tracking technique for precise land surface displacement observations with KOMPSAT-5 SAR imagery.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

S.-H. Chae, S.-J. Lee, and K.-J. Lee "An effective method for precisely observing large-scale land surface displacements with KOMPSAT-5 SAR satellite imagery: coarse-to-fine SAR offset tracking methods", Proc. SPIE 13195, Microwave Remote Sensing: Data Processing and Applications III, 131950L (18 November 2024); https://doi.org/10.1117/12.3029755

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KEYWORDS

Synthetic aperture radar

Satellite imaging

Earthquakes

Glaciers

Deformation

X band

Interferometric synthetic aperture radar

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