Evaluating SWOT's interferometric capabilities for mapping intertidal topography

The Surface Water and Ocean Topography (SWOT) mission, originally designed for observing ocean and inland water bodies, can be a valuable tool for mapping the topography of intertidal flats. This study provides the first demonstration of SWOT's ability to measure intertidal topography using simultaneous interferometric acquisitions. Observations acquired between April and July 2023, during the calibration/validation (CALVAL) phase of the mission, were used. SWOT-derived intertidal Digital Elevation Models (DEMs) were generated from level-2 High-Rate Pixel Cloud (L2_HR_PIXC) products and compared to airborne and UAV LiDAR-derived DEMs. Our results indicate a high reliability of the SWOT observations with a mean absolute error lower than 0.49 m, reaching 0.13 m in specific areas. This validation confirms SWOT's contribution for coastal studies beyond water level mapping, showcasing its broader applicability in the monitoring and management of coastal and estuarine environments.

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Domaines

Sciences de l'environnement

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1-s2.0-S0034425724004279-main.pdf (12.58 Mo)

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https://hal.inrae.fr/hal-04820523

Soumis le : jeudi 5 décembre 2024-12:03:36

Dernière modification le : dimanche 23 novembre 2025-03:24:29

Dates et versions

hal-04820523 , version 1 (05-12-2024)

Licence

CC BY 4.0 - Attribution

Identifiants

HAL Id : hal-04820523 , version 1
DOI : 10.1016/j.rse.2024.114401
WOS : 001306858700001

Citer

Edward Salameh, Damien Desroches, Julien Deloffre, Roger Fjørtoft, Ernesto Tonatiuh Mendoza, et al.. Evaluating SWOT's interferometric capabilities for mapping intertidal topography. Remote Sensing of Environment, 2024, 314, pp.114401. ⟨10.1016/j.rse.2024.114401⟩. ⟨hal-04820523⟩