Reduction of rain-induced errors for wind speed estimation on SAR observations using convolutional neural networks - Inria - Institut national de recherche en sciences et technologies du numérique
Journal Articles IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Year : 2023

Reduction of rain-induced errors for wind speed estimation on SAR observations using convolutional neural networks

Abstract

Synthetic Aperture Radar is known to be able to provide high-resolution estimates of surface wind speed. These estimates usually rely on a Geophysical Model Function (GMF) that has difficulties accounting for non-wind processes such as rain events. Convolutional neural network, on the other hand, have the capacity to use contextual information and have demonstrated their ability to delimit rainfall areas. By carefully building a large dataset of SAR observations from the Copernicus Sentinel-1 mission, collocated with both GMF and atmospheric model wind speeds as well as rainfall estimates, we were able to train a wind speed estimator with reduced errors under rain. Collocations with in-situ wind speed measurements from buoys show a root mean square error that is reduced by 27% (resp. 45%) under rainfall estimated at more than 1 mm/h (resp. 3 mm/h). These results demonstrate the capacity of deep learning models to correct rain-related errors in SAR products.
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hal-04149533 , version 1 (03-07-2023)

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Aurélien Colin, Pierre Tandeo, Charles Peureux, Romain Husson, Ronan Fablet. Reduction of rain-induced errors for wind speed estimation on SAR observations using convolutional neural networks. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023, pp.1 - 13. ⟨10.1109/jstars.2023.3291236⟩. ⟨hal-04149533⟩
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