Articles | Volume 1, issue 1
https://doi.org/10.5194/eo-1-105-2026
https://doi.org/10.5194/eo-1-105-2026
Research article
 | 
17 Sep 2026
Research article |  | 17 Sep 2026

Evaluation of ASCAT soil moisture retrievals and their potential to detect intraday variability

Lan Anh Dinh, Filipe Aires, and Victor Pellet

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Cited articles

Abbaszadeh, P., Moradkhani, H., and Zhan, X.: Downscaling SMAP Radiometer Soil Moisture Over the CONUS Using an Ensemble Learning Method, Water Resour. Res., 55, 324–344, https://doi.org/10.1029/2018WR023354, 2019. a
Aires, F., Prigent, C., Rossow, W. B., and Rothstein, M.: A new neural network approach including first guess for retrieval of atmospheric water vapor, cloud liquid water path, surface temperature, and emissivities over land from satellite microwave observations, J. Geophys. Res.-Atmos., 106, 14887–14907, https://doi.org/10.1029/2001JD900085, 2001. a, b, c, d
Aires, F., Prigent, C., and Rossow, W. B.: Sensitivity of satellite microwave and infrared observations to soil moisture at a global scale: 2. Global statistical relationships, J. Geophys. Res.-Atmos., 110, https://doi.org/10.1029/2004JD005094, 2005. a
Aires, F., Boucher, E., and Pellet, V.: Convolutional neural networks for satellite remote sensing at coarse resolution. Application for the SST retrieval using IASI, Remote Sens. Environ., 263, 112553, https://doi.org/10.1016/j.rse.2021.112553, 2021a. a, b, c, d
Aires, F., Weston, P., de Rosnay, P., and Fairbairn, D.: Statistical approaches to assimilate ASCAT soil moisture information – I. Methodologies and first assessment, Q. J. Roy. Meteor. Soc., 147, 1823–1852, https://doi.org/10.1002/qj.3997, 2021b. a, b
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Short summary
Soil moisture (SM) plays a key role in weather, agriculture, and water management. While satellites can measure SM from space, obtaining accurate, frequent measurements throughout the day remains challenging. Here, we explore how deep learning models can improve sub-daily SM estimates. Our approach focuses on capturing spatial patterns and adapting to local conditions. Using data from the Advanced SCATterometer (ASCAT) satellite instrument, we show that this model can produce reliable SM estimates multiple times a day. 
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