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

Hahn, Sebastian; Melzer, Thomas; Wagner, Wolfgang

doi:10.5194/essd-18-4393-2026

Articles | Volume 18, issue 6

https://doi.org/10.5194/essd-18-4393-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/essd-18-4393-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 6

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

Data sets

Metop ASCAT Surface Soil Moisture Climate Data Record v8 12.5 km sampling (H121) EUMETSAT H SAF https://doi.org/10.15770/EUM_SAF_H_0011

Metop ASCAT Surface Soil Moisture Climate Data Record v1 6.25 km sampling (H129) EUMETSAT H SAF https://doi.org/10.15770/EUM_SAF_H_0012

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.