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.

中文翻译：

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评估用于绘制潮间带地形的 SWOT 干涉测量能力


地表水和海洋地形 (SWOT) 任务最初是为观测海洋和内陆水体而设计的，现在可以成为绘制潮间带地形图的宝贵工具。这项研究首次证明了 SWOT 使用同步干涉采集来测量潮间带地形的能力。使用了 2023 年 4 月至 7 月期间任务校准/验证 (CALVAL) 阶段获得的观测结果。 SWOT 衍生的潮间带数字高程模型 (DEM) 是从 2 级高速像素云 (L2_HR_PIXC) 产品生成的，并与机载和无人机 LiDAR 衍生的 DEM 进行比较。我们的结果表明 SWOT 观测的可靠性很高，平均绝对误差低于 0.49 m，在特定区域达到 0.13 m。此次验证证实了 SWOT 对水位测绘之外的沿海研究的贡献，展示了其在沿海和河口环境监测和管理方面的更广泛适用性。