Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 30, issue 20
Articles | Volume 30, issue 20
https://doi.org/10.5194/hess-30-6443-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-6443-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 30, issue 20
Research article
 | 
22 Oct 2026
Research article |  | 22 Oct 2026

Evaluation of SWOT HR PIXC version D water level time series of small lakes

Simon Jakob Köhn and Karina Nielsen

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Latest update: 22 Oct 2026
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Short summary
The new Surface Water and Ocean Topography (SWOT) satellite represents a leap in satellite-based observations of surface water elevations. We evaluated SWOT’s ability to measure water levels in Danish lakes larger than 0.25km2. We compared data from the SWOT satellite with in-situ station data from 37 lakes. To ensure valid water levels, we tested six methods for selecting SWOT's data. Furthermore, we show that SWOT Pixel Cloud data contains indications of a time-varying residual roll error.
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