Articles | Volume 18, issue 6
https://doi.org/10.5194/essd-18-4393-2026
https://doi.org/10.5194/essd-18-4393-2026
Data description article
 | 
26 Jun 2026
Data description article |  | 26 Jun 2026

Next-generation Metop ASCAT surface soil moisture datasets from EUMETSAT H SAF

Sebastian Hahn, Thomas Melzer, and Wolfgang Wagner

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Cited articles

Aires, F., Weston, P., 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, 2021. a
Al-Yaari, A., Dayau, S., Chipeaux, C., Aluome, C., Kruszewski, A., Loustau, D., and Wigneron, J.-P.: The AQUI Soil Moisture Network for Satellite Microwave Remote Sensing Validation in South-Western France, Remote Sens., 10, 1839, https://doi.org/10.3390/rs10111839, 2018. a
Al-Yaari, A., Wigneron, J.-P., Dorigo, W., Colliander, A., Pellarin, T., Hahn, S., Mialon, A., Richaume, P., Fernandez-Moran, R., Fan, L., Kerr, Y., and Lannoy, G. D.: Assessment and inter-comparison of recently developed/reprocessed microwave satellite soil moisture products using ISMN ground-based measurements, Remote Sens. Environ., 224, 289–303, https://doi.org/10.1016/j.rse.2019.02.008, 2019. a, b
Albergel, C., Rüdiger, C., Pellarin, T., Calvet, J.-C., Fritz, N., Froissard, F., Suquia, D., Petitpa, A., Piguet, B., and Martin, E.: From near-surface to root-zone soil moisture using an exponential filter: an assessment of the method based on in-situ observations and model simulations, Hydrol. Earth Syst. Sci., 12, 1323–1337, https://doi.org/10.5194/hess-12-1323-2008, 2008. a
Alday, J. G., Camarero, J. J., Revilla, J., and Resco de Dios, V.: Similar diurnal, seasonal and annual rhythms in radial root expansion across two coexisting Mediterranean oak species, Tree Physiol., 40, 956–968, https://doi.org/10.1093/treephys/tpaa041, 2020. a
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Short summary
This article presents the latest version of the H SAF (Satellite Application Facility on Support to Operational Hydrology and Water Management) ASCAT (Advanced Scatterometer) SSM (surface soil moisture) datasets, unifying the NRT (near real-time) product with the historical offline data record. This release now applies the latest retrieval algorithm to both data streams, creating a consistent and unified data stream that is further complemented by a new, high-resolution 6.25 km sampling SSM product. The H SAF ASCAT SSM datasets are publicly available from https://hsaf.meteoam.it.
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