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Metop ASCAT NRT Root Zone Soil Moisture Profile Index 10km resolution

Analysed liquid soil moisture profile index for four different soil layers (covering the root zone from the surface to ~ 3 metres) generated by the ECMWF soil moisture assimilation system at 24 hour time steps.

  • Coverage: Global
  • Cycle: 24 h
  • Resolution: HR: 0.1 degrees (~10km) - VR: 4 layers in the range surface to 2.89m: layer-1 (0-7cm), layer-2 (7- 28cm), layer-3 (28-100cm) and layer-4 (100-289cm)
  • Accuracy: Threshold: CC 0.50 - Target: CC 0.65 - Optimal: CC 0.80
  • Timeliness: 12 h
  • Dissemination: Means: FTP, EUMETCast - Type: NRT
  • Formats: Values on regular 0.1° lat/lon grid, in NetCDF files and Tco1279 grid in GRIB files

Short description of the basic principles for product generation

The analysed soil moisture fields are based on a modelled first guess, the screen-level temperature and humidity analyses, and the ASCAT-derived surface soil moisture. They are then re-scaled soil wetness index by normalising by the saturated soil moisture value as a function of soil type. The Global product is generated starting from the EUMETCast SSM product.

User Documents

Algorithm Theoretical Baseline Document (ATBD)


Product User Manual (PUM)


Product Validation Report (PVR)


Operational Reports